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Affiliation(s)
- F. P. Brady
- University of California-Davis, Crocker Nuclear Laboratory and Department of Physics Davis, California 95616
| | - J. L. Romero
- University of California-Davis, Crocker Nuclear Laboratory and Department of Physics Davis, California 95616
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Chung P, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Holzmann W, Huo L, Issah M, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Lisa MA, Liu H, Liu YM, Milan J, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin S, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Srivastava B, Stone NTB, Symons TJM, Taranenko A, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN, Oeschler H. Near-threshold production of the multistrange Xi- hyperon. Phys Rev Lett 2003; 91:202301. [PMID: 14683356 DOI: 10.1103/physrevlett.91.202301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2003] [Indexed: 05/24/2023]
Abstract
The yield for the multistrange Xi(-) hyperon has been measured in 6A GeV Au+Au collisions via reconstruction of its decay products pi(-) and Lambda, the latter also being reconstructed from its daughter tracks of pi(-) and p. The measurement is rather close to the threshold for Xi(-) production and therefore provides an important test of model predictions. The measured yield for Xi(-) and Lambda are compared for several centralities. In central collisions the Xi(-) yield is found to be in excellent agreement with statistical and transport model predictions, suggesting that multistrange hadron production approaches chemical equilibrium in high baryon density nuclear matter.
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Affiliation(s)
- P Chung
- Departments of Chemistry and Physics, SUNY at Stony Brook, New York 11794-3400, USA
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3
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Chung P, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Holzmann W, Huo L, Issah M, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin S, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Srivastava B, Stone NTB, Symons TJM, Taranenko A, Whitfield J, Witt R, Wood L, Zhang WN, Brown D, Pratt S, Wang F, Danielewicz P. Comparison of source images for protons, pi-'s, and lambda's in 6A GeV Au+Au collisions. Phys Rev Lett 2003; 91:162301. [PMID: 14611394 DOI: 10.1103/physrevlett.91.162301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2002] [Indexed: 05/24/2023]
Abstract
Source images are extracted from two-particle correlations constructed from strange and nonstrange hadrons produced in 6A GeV Au+Au collisions. Very different source images result from pp vs p Lambda vs pi(-)pi(-) correlations. Scaling by transverse mass can describe the apparent source size ratio for p/pi(-) but not for Lambda/pi(-) or Lambda/p. These observations suggest important differences in the space-time emission histories for protons, pions, and neutral strange baryons produced in the same events.
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Affiliation(s)
- P Chung
- Department of Chemistry, SUNY, Stony Brook, New York 11794-3400, USA
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4
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Klay JL, Ajitanand NN, Alexander JM, Anderson MG, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Krofcheck D, Lacey RA, Lauret J, Law C, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Wang S, Wells R, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN. Longitudinal flow of protons from (2-8)A GeV central Au+Au collisions. Phys Rev Lett 2002; 88:102301. [PMID: 11909348 DOI: 10.1103/physrevlett.88.102301] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2001] [Indexed: 05/23/2023]
Abstract
Rapidity distributions of protons from central 197Au+197Au collisions measured by the E895 Collaboration in the energy range from (2-8)A GeV at the Brookhaven AGS are presented. Longitudinal flow parameters derived using a thermal model including collective longitudinal expansion are extracted from these distributions. The results show an approximately linear increase in the longitudinal flow velocity, <betagamma>(L), as a function of the logarithm of beam energy.
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Affiliation(s)
- J L Klay
- University of California, Davis, California 95616, USA
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5
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Panitkin SY, Ajitanand NN, Alexander J, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance J, Chung P, Cole B, Crowe K, Das A, Draper J, Gilkes M, Gushue S, Heffner M, Hirsch A, Hjort E, Huo L, Justice M, Kaplan M, Keane D, Kintner J, Klay J, Krofcheck D, Lacey R, Lauret J, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson D, Pinkenburg C, Porile N, Rai G, Ritter HG, Romero J, Scharenberg R, Schroeder LS, Srivastava B, Stone NT, Symons TJ, Wang S, Wells R, Whitfield J, Wienold T, Witt R, Wood L, Yang X, Zhang WN, Zhang Y, Brown DA, Danielewicz P. Model-independent source imaging using two-pion correlations in (2 to 8)a GeV Au+Au collisions. Phys Rev Lett 2001; 87:112304. [PMID: 11531518 DOI: 10.1103/physrevlett.87.112304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2000] [Indexed: 05/23/2023]
Abstract
We report a particle source imaging analysis based on two-pion correlations in high multiplicity Au+Au collisions at beam energies between 2A and 8A GeV. We apply the imaging technique introduced by Brown and Danielewicz, which allows a model-independent extraction of source functions with useful accuracy out to relative pion separations of about 20 fm. The extracted source functions have Gaussian shapes. Values of source functions at zero separation are almost constant across the energy range under study. Imaging results are found to be consistent with conventional source parameters obtained from a multidimensional Hanburg-Brown-Twiss analysis.
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6
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Chung P, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das A, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NT, Symons TJ, Wienold T, Witt R, Whitfield J, Wood L, Zhang WN. Directed flow of lambda hyperons in (2-6 )A GeV Au+Au collisions. Phys Rev Lett 2001; 86:2533-2536. [PMID: 11289973 DOI: 10.1103/physrevlett.86.2533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2000] [Indexed: 05/23/2023]
Abstract
Directed flow measurements for Lambda hyperons are presented and compared to those for protons produced in the same Au+Au collisions (2A, 4A, and 6A GeV; b<5-6 fm). The measurements indicate that Lambda hyperons flow consistently in the same direction but with smaller magnitudes. A strong positive flow [for Lambdas] has been predicted in calculations which include the influence of the Lambda-nucleon potential. The experimental flow ratio Lambda/p is in qualitative agreement with expectations (approximately 2/3) from the quark counting rule at 2A GeV but is found to decrease with increasing beam energy.
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7
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Afanasiev SV, Anticic T, Bächler J, Barna D, Barnby LS, Bartke J, Barton RA, Betev L, Bialkowska H, Billmeier A, Blume C, Blyth CO, Boimska B, Botje M, Bracinik J, Brady FP, Bramm R, Brun R, Buncic P, Carr L, Cebra D, Cooper GE, Cramer JG, Csató P, Eckardt V, Eckhardt F, Ferenc D, Filip P, Fischer HG, Fodor Z, Foka P, Freund P, Friese V, Ftacnik J, Gál J, Gazdzicki M, Georgopoulos G, Gladysz E, Harris JW, Hegyi S, Hlinka V, Höhne C, Igo G, Ivanov M, Jacobs P, Janik R, Jones PG, Kadija K, Kolesnikov VI, Kollegger T, Kowalski M, Lasiuk B, van Leeuwen M, Lévai P, Malakhov AI, Margetis S, Markert C, Mayes BW, Melkumov GL, Mischke A, Molnár J, Nelson JM, Odyniec G, Pálla G, Panagiotou AD, Petridis A, Pikna M, Pinsky L, Poskanzer AM, Prindle DJ, Pühlhofer F, Reid JG, Renfordt R, Retyk W, Ritter HG, Röhrich D, Roland C, Roland G, Rybicki A, Sammer T, Sandoval A, Sann H, Schäfer E, Schmitz N, Seyboth P, Siklér F, Sitar B, Skrzypczak E, Snellings R, Squier GT, Stock R, Strmen P, Ströbele H, Susa T, Szarka I, Szentpétery I, Sziklai J, Toy M, Trainor TA, Trentalange S, Ullrich T, Varga D, Vassiliou M, Veres GI, Vesztergombi G, Voloshin S, Vranic D, Wang F, Weerasundara DD, Wenig S, Wetzler A, Whitten C, Xu N, Yates TA, Yoo IK, Zimányi J. Event-by-event fluctuations of the Kaon-to-Pion ratio in central Pb+Pb collisions at 158 GeV per nucleon. Phys Rev Lett 2001; 86:1965-1969. [PMID: 11289831 DOI: 10.1103/physrevlett.86.1965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2000] [Indexed: 05/23/2023]
Abstract
We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined for individual central Pb+Pb collisions. After accounting for the fluctuations due to detector resolution and finite number statistics we derive an upper limit on genuine nonstatistical fluctuations, which could be related to a first- or second-order QCD phase transition. Such fluctuations are shown to be very small.
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8
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Ackermann KH, Adams N, Adler C, Ahammed Z, Ahmad S, Allgower C, Amsbaugh J, Anderson M, Anderssen E, Arnesen H, Arnold L, Averichev GS, Baldwin A, Balewski J, Barannikova O, Barnby LS, Baudot J, Beddo M, Bekele S, Belaga VV, Bellwied R, Bennett S, Bercovitz J, Berger J, Betts W, Bichsel H, Bieser F, Bland LC, Bloomer M, Blyth CO, Boehm J, Bonner BE, Bonnet D, Bossingham R, Botlo M, Boucham A, Bouillo N, Bouvier S, Bradley K, Brady FP, Braithwaite ES, Braithwaite W, Brandin A, Brown RL, Brugalette G, Byrd C, Caines H, Calderón de la Barca Sánchez M, Cardenas A, Carr L, Carroll J, Castillo J, Caylor B, Cebra D, Chatopadhyay S, Chen ML, Chen W, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Chrin J, Christie W, Coffin JP, Conin L, Consiglio C, Cormier TM, Cramer JG, Crawford HJ, Danilov VI, Dayton D, DeMello M, Deng WS, Derevschikov AA, Dialinas M, Diaz H, DeYoung PA, Didenko L, Dimassimo D, Dioguardi J, Dominik W, Drancourt C, Draper JE, Dunin VB, Dunlop JC, Eckardt V, Edwards WR, Efimov LG, Eggert T, Emelianov V, Engelage J, Eppley G, Erazmus B, Etkin A, Fachini P, Feliciano C, Ferenc D, Ferguson MI, Fessler H, Finch E, Fine V, Fisyak Y, Flierl D, Flores I, Foley KJ, Fritz D, Gagunashvili N, Gans J, Gazdzicki M, Germain M, Geurts F, Ghazikhanian V, Gojak C, Grabski J, Grachov O, Grau M, Greiner D, Greiner L, Grigoriev V, Grosnick D, Gross J, Guilloux G, Gushin E, Hall J, Hallman TJ, Hardtke D, Harper G, Harris JW, He P, Heffner M, Heppelmann S, Herston T, Hill D, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Howe M, Huang HZ, Humanic TJ, Hümmler H, Hunt W, Hunter J, Igo GJ, Ishihara A, Ivanshin YI, Jacobs P, Jacobs WW, Jacobson S, Jared R, Jensen P, Johnson I, Jones PG, Judd E, Kaneta M, Kaplan M, Keane D, Kenney VP, Khodinov A, Klay J, Klein SR, Klyachko A, Koehler G, Konstantinov AS, Kormilitsyne V, Kotchenda L, Kotov I, Kovalenko AD, Kramer M, Kravtsov P, Krueger K, Krupien T, Kuczewski P, Kuhn C, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lakehal-Ayat L, Lamas-Valverde J, Lamont MA, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lebedev A, LeCompte T, Leonhardt WJ, Leontiev VM, Leszczynski P, LeVine MJ, Li Q, Li Q, Li Z, Liaw CJ, Lin J, Lindenbaum SJ, Lindenstruth V, Lindstrom PJ, Lisa MA, Liu H, Ljubicic T, Llope WJ, LoCurto G, Long H, Longacre RS, Lopez-Noriega M, Lopiano D, Love WA, Lutz JR, Lynn D, Madansky L, Maier R, Majka R, Maliszewski A, Margetis S, Marks K, Marstaller R, Martin L, Marx J, Matis HS, Matulenko YA, Matyushevski EA, McParland C, McShane TS, Meier J, Melnick Y, Meschanin A, Middlekamp P, Mikhalin N, Miller B, Milosevich Z, Minaev NG, Minor B, Mitchell J, Mogavero E, Moiseenko VA, Moltz D, Moore CF, Morozov V, Morse R, de Moura MM, Munhoz MG, Mutchler GS, Nelson JM, Nevski P, Ngo T, Nguyen M, Nguyen T, Nikitin VA, Nogach LV, Noggle T, Norman B, Nurushev SB, Nussbaum T, Nystrand J, Odyniec G, Ogawa A, Ogilvie CA, Olchanski K, Oldenburg M, Olson D, Ososkov GA, Ott G, Padrazo D, Paic G, Pandey SU, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Pentia M, Perevotchikov V, Peryt W, Petrov VA, Pinganaud W, Pirogov S, Platner E, Pluta J, Polk I, Porile N, Porter J, Poskanzer AM, Potrebenikova E, Prindle D, Pruneau C, Puskar-Pasewicz J, Rai G, Rasson J, Ravel O, Ray RL, Razin SV, Reichhold D, Reid J, Renfordt RE, Retiere F, Ridiger A, Riso J, Ritter HG, Roberts JB, Roehrich D, Rogachevski OV, Romero JL, Roy C, Russ D, Rykov V, Sakrejda I, Sanchez R, Sandler Z, Sandweiss J, Sappenfield P, Saulys AC, Savin I, Schambach J, Scharenberg RP, Scheblien J, Scheetz R, Schlueter R, Schmitz N, Schroeder LS, Schulz M, Schüttauf A, Sedlmeir J, Seger J, Seliverstov D, Seyboth J, Seyboth P, Seymour R, Shakaliev EI, Shestermanov KE, Shi Y, Shimanskii SS, Shuman D, Shvetcov VS, Skoro G, Smirnov N, Smykov LP, Snellings R, Solberg K, Sowinski J, Spinka HM, Srivastava B, Stephenson EJ, Stock R, Stolpovsky A, Stone N, Stone R, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide AA, Sugarbaker E, Suire C, Symons TJ, Takahashi J, Tang AH, Tarchini A, Tarzian J, Thomas JH, Tikhomirov V, Szanto De Toledo A, Tonse S, Trainor T, Trentalange S, Tokarev M, Tonjes MB, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood DG, Vakula I, Van Buren G, VanderMolen AM, Vanyashin A, Vasilevski IM, Vasiliev AN, Vigdor SE, Visser G, Voloshin SA, Vu C, Wang F, Ward H, Weerasundara D, Weidenbach R, Wells R, Wells R, Wenaus T, Westfall GD, Whitfield JP, Whitten C, Wieman H, Willson R, Wilson K, Wirth J, Wisdom J, Wissink SW, Witt R, Wolf J, Wood L, Xu N, Xu Z, Yakutin AE, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich VI, Zanevski YV, Zhang J, Zhang WM, Zhu J, Zimmerman D, Zoulkarneev R, Zubarev AN. Elliptic flow in Au+Au collisions at square root(S)NN = 130 GeV. Phys Rev Lett 2001; 86:402-407. [PMID: 11177841 DOI: 10.1103/physrevlett.86.402] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2000] [Indexed: 05/23/2023]
Abstract
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at square root(S)NN = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
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9
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Elliott JB, Moretto LG, Phair L, Wozniak GJ, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra DA, Chacon AD, Chance JL, Choi Y, Costa S, Gilkes ML, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner JC, Lindenstruth V, Lisa MA, Matis HS, McMahan M, McParland C. Nuclear multifragmentation, percolation, and the fisher droplet model: common features of reducibility and thermal scaling. Phys Rev Lett 2000; 85:1194-1197. [PMID: 10991510 DOI: 10.1103/physrevlett.85.1194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2000] [Indexed: 05/23/2023]
Abstract
It is shown that the Fisher droplet model, percolation, and nuclear multifragmentation share the common features of reducibility (stochasticity in multiplicity distributions) and thermal scaling (one-fragment production probabilities are Boltzmann factors). Barriers obtained, for cluster production on percolation lattices, from the Boltzmann factors show a power-law dependence on cluster size with an exponent of 0.42+/-0.02. The EOS Collaboration Au multifragmentation data yield barriers with a power-law exponent of 0.68+/-0.03. Values of the surface energy coefficient of a low density nuclear system are also extracted.
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Affiliation(s)
- JB Elliott
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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10
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Chung P, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das A, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D. Antiflow of K(0)(s) mesons in 6A GeV Au + Au collisions. Phys Rev Lett 2000; 85:940-943. [PMID: 10991444 DOI: 10.1103/physrevlett.85.940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2000] [Indexed: 05/23/2023]
Abstract
We have measured the sideward flow of neutral strange ( K(0)(s)) mesons in 6A GeV Au+Au collisions. A prominent antiflow signal is observed for an impact parameter range ( b less, similar7 fm) which spans central and midcentral events. Since the K(0)(s) scattering cross section is relatively small in nuclear matter, this observation suggests that the in-medium kaon vector potential plays an important role in high density nuclear matter.
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Affiliation(s)
- P Chung
- Departments of Chemistry and Physics, SUNY, Stony Brook, New York 11794-3400, USA
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11
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Liu H, Ajitanand NN, Alexander J, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance J, Cole B, Crowe K, Das A, Draper J, Gilkes M, Gushue S, Heffner M, Hirsch A, Hjort E, Huo L, Justice M, Kaplan M, Keane D, Kintner J, Klay J, Krofcheck D. Sideward flow in Au+Au collisions between 2A and 8A GeV. Phys Rev Lett 2000; 84:5488-5492. [PMID: 10990976 DOI: 10.1103/physrevlett.84.5488] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/1999] [Revised: 04/05/2000] [Indexed: 05/23/2023]
Abstract
Using the large acceptance Time Projection Chamber of experiment E895 at Brookhaven, measurements of collective sideward flow in Au+Au collisions at beam energies of 2A, 4A, 6A, and 8A GeV are presented in the form of in-plane transverse momentum <p(x)> and the first Fourier coefficient of azimuthal anisotropy v(1). These measurements indicate a smooth variation of sideward flow as a function of beam energy. The data are compared with four nuclear transport models which have an orientation towards this energy range. All four exhibit some qualitative trends similar to those found in the data, although none show a consistent pattern of agreement within experimental uncertainties.
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Affiliation(s)
- H Liu
- Kent State University, Kent, Ohio 44242, USA
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12
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Lisa MA, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J. Bombarding energy dependence of pi(-) interferometry at the brookhaven AGS. Phys Rev Lett 2000; 84:2798-2802. [PMID: 11018945 DOI: 10.1103/physrevlett.84.2798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/1999] [Indexed: 05/23/2023]
Abstract
We present the first excitation function of pi(-) intensity interferometry at Alternating Gradient Synchrotron (AGS) energies (2-8 A GeV). The sensitivity of the multidimensional correlation functions to the geometry and dynamics of the pion-emitting system provides a stringent test of transport models of heavy ion collisions. Detailed comparisons with a realistic transport model, both with and without an explicit nuclear mean field, suggest that the beam energy evolution in the reaction dynamics is different in the model than in the data. A significantly increased pi(-) emission time scale, which has been suggested as a signal of the onset of the transition to quark-gluon plasma, is not observed.
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Affiliation(s)
- MA Lisa
- The Ohio State University, Columbus, Ohio 43210, USA
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13
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Brady FP, Needham GA, Ullmann JL, Castaneda CM, Ford TD, King NSP, Romero JL, Webb ML, Brown VR, Poppe CH. Excitation of analogue isovector resonances via the (n,p) reaction at 60 MeV. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4616/10/3/011] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hauger JA, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra DA, Chacon AD, Chance JL, Choi Y, Costa S, Elliott JB, Gilkes ML, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner JC, Lindenstruth V, Lisa MA, Lynen U, Matis HS, McMahan M, McParland C, Müller WF, Olson DL, Partlan MD, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Sann H, Scharenberg R, Scott A, Shao Y, Srivastava BK, Symons TJ, Tincknell M, Tuvé C, Wang S, Warren P, Wieman HH, Wienold T, Wolf K. Dynamics of the Multifragmentation of 1A GeV Gold on Carbon. Phys Rev Lett 1996; 77:235-238. [PMID: 10062400 DOI: 10.1103/physrevlett.77.235] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wang S, Lisa MA, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra DA, Chacon AD, Chance JL, Choi Y, Costa S, Elliott JB, Gilkes ML, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner J, Lindenstruth V, Liu H, Matis HS, McMahan M, McParland C, Olson DL, Partlan MD, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Scharenberg RP, Scott A, Shao Y, Srivastava BK, Symons TJ, Tincknell ML, Tuvè C, Warren PG, Weerasundara D, Wieman HH, Wolf KL. In-plane retardation of collective expansion in Au+Au collisions. Phys Rev Lett 1996; 76:3911-3914. [PMID: 10061144 DOI: 10.1103/physrevlett.76.3911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wang K, Martoff CJ, Pocanic D, Hanna SS, Brady FP, Romero JL, Castaneda CM, Drummond JR, McEachern B, Sorenson DS. Reaction 13C(n,p)13B at 65 MeV. Phys Rev C Nucl Phys 1996; 53:1718-1724. [PMID: 9971122 DOI: 10.1103/physrevc.53.1718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Hjort EL, Brady FP, Drummond JR, McEachern B, Osborne JH, Romero JL, Sorenson DS, Tang HH. Measurements of 65 MeV Fe, Sn, and Pb(n,n'x) continuum cross sections. Phys Rev C Nucl Phys 1996; 53:237-242. [PMID: 9970933 DOI: 10.1103/physrevc.53.237] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Alber T, Appelshäuser H, Bächler J, Bartke J, Bialkowska H, Bieser F, Bloomer MA, Blyth CO, Bock R, Bormann C, Brady FP, Brockmann R, Buncic P, Caines HL, Cebra D, Chan P, Cooper GE, Cramer JG, Cramer PB, Csato P, Derado I, Dunn J, Eckardt V, Eckhardt F, Euler S, Ferguson MI, Fischer HG, Fodor Z, Foka P, Freund P, Fuchs M, Gal J, Gazdzicki M, Gladysz E, Grebieszkow J, Günther J, Harris JW, Heck W, Hegyi S, Hill LA, Huang I, Howe MA, Igo G, Irmscher D, Jacobs P, Jones PG, Kadija K, Kecskemeti J, Kowalski M, Kühmichel A, Lasiuk B, Margetis S, Mitchell JW, Mock A, Nelson JM, Odyniec G, Palinkas J, Palla G, Panagiotou AD, Petridis A, Piper A, Poskanzer AM, Prindle DJ, Pühlhofer F. Transverse energy production in 208Pb+Pb collisions at 158 GeV per nucleon. Phys Rev Lett 1995; 75:3814-3817. [PMID: 10059738 DOI: 10.1103/physrevlett.75.3814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Lisa MA, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra DA, Chacon AD, Chance JL, Choi Y, Costa S, Elliott JB, Gilkes ML, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner J, Matis HS, McMahan M, McParland C, Olson DL, Partlan MD, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Scharenberg R, Scott A, Shao Y, Srivastava BK, Symons TJ, Tincknell M, Tuvé C, Wang S, Warren P, Westfall GD, Wieman HH, Wolf K. Radial flow in Au+Au collisions at E=(0.25-1.15)A GeV. Phys Rev Lett 1995; 75:2662-2665. [PMID: 10059373 DOI: 10.1103/physrevlett.75.2662] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Partlan MD, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra D, Chacon AD, Chance J, Choi Y, Costa S, Elliott JB, Gilkes ML, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner J, Lisa MA, Matis HS, McMahan M, McParland C, Olson DL, Peilert G, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Scharenberg RP, Scott A, Shao Y, Srivastava BK, Symons TJ, Tincknell ML, Tuvé C, Wang S, Warren PG, Wieman HH, Wolf K. Fragment flow in Au+Au collisions. Phys Rev Lett 1995; 75:2100-2103. [PMID: 10059214 DOI: 10.1103/physrevlett.75.2100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wang S, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra DA, Chacon AD, Chance JL, Choi Y, Costa S, Elliott JB, Gilkes ML, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner J, Lisa MA, Matis HS, McMahan M, McParland C, Olson DL, Partlan MD, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Scharenberg RP, Scott A, Shao Y, Srivastava BK, Symons TJ, Tincknell ML, Tuvè C, Warren PG, Weerasundara D, Wieman HH, Wolf KL. Light Fragment Production and Power Law Behavior in Au + Au Collisions. Phys Rev Lett 1995; 74:2646-2649. [PMID: 10057982 DOI: 10.1103/physrevlett.74.2646] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Gilkes ML, Albergo S, Bieser F, Brady FP, Caccia Z, Cebra DA, Chacon AD, Chance JL, Choi Y, Costa S, Elliott JB, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner JC, Lindenstruth V, Lisa MA, Lynen U, Matis HS, McMahan M, McParland C, Müller WF, Olson DL, Partlan MD, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Sann H, Scharenberg R, Scott A, Shao Y, Srivastava BK, Symons TJ, Tincknell M, Tuvé C, Wang S, Warren P, Wieman HH, Wolf K. Determination of critical exponents from the multifragmentation of gold nuclei. Phys Rev Lett 1994; 73:1590-1593. [PMID: 10056833 DOI: 10.1103/physrevlett.73.1590] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Brady FP, Christie WB, Romero JL, Tull CE, Chance JL, Grim GP, Young JC, Crawford HJ, Kobayashi T, Lindstrom PJ, Olson DL, Symons TJ, Tanihata I, Wieman H, Müller WF, Sann H, Lynen U. Fragment mass dependence of pT at GeV per nucleon energies. Phys Rev C Nucl Phys 1994; 50:R525-R529. [PMID: 9969777 DOI: 10.1103/physrevc.50.r525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Hjort EL, Brady FP, Romero JL, Drummond JR, Sorenson DS, Osborne JH, McEachern B, Hansen LF. Measurements and analysis of neutron elastic scattering at 65 MeV. Phys Rev C Nucl Phys 1994; 50:275-281. [PMID: 9969657 DOI: 10.1103/physrevc.50.275] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Christie WB, Romero JL, Brady FP, Tull CE, Grim GP, McEachern B, Young JC, Crawford HJ, Greiner DE, Lindstrom PJ, Sann H, Lynen U. Fragmentation of 1.2 GeV per nucleon 139La. Phys Rev C Nucl Phys 1993; 48:2973-2983. [PMID: 9969175 DOI: 10.1103/physrevc.48.2973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Park BK, Rapaport J, Fink G, Ullmann JL, Ling AG, Sorenson DS, Brady FP, Romero JL, Howell CR, Tornow W, Unkelbach W. Energy dependence of multipole strength distributions in the 32S(n,p)32P reaction. Phys Rev C Nucl Phys 1993; 48:711-722. [PMID: 9968882 DOI: 10.1103/physrevc.48.711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Christie WB, Olson DL, Tull CE, Brady FP, Grim GP, Osborne JH, Partlan ML, Romero JL, Chang J, Fung SY, Kang J, Zhang S, Keane D, Beavis D, Dardenne Y. Pion correlations for 1.2A GeV lanthanum on lanthanum. Phys Rev C Nucl Phys 1993; 47:779-787. [PMID: 9968494 DOI: 10.1103/physrevc.47.779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Christie WB, Mueller WF, Olson DL, Symons TJ, Wieman HH, Beavis D, Brady FP, Romero JL, Tull CE, Abbott T, Fung SY, Keane D, Liu Y. Pion correlations in 1.8A GeV Ar on KCl and La and 1.2A GeV Xe on La. Phys Rev C Nucl Phys 1992; 45:2836-2853. [PMID: 9968049 DOI: 10.1103/physrevc.45.2836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Park BK, Rapaport J, Ullmann JL, Ling AG, Sorenson DS, Brady FP, Romero JL, Howell CR, Tornow W, Rönnqvist CT. Gamow-Teller and dipole strength distribution in 40Ca(n,p)40K reaction. Phys Rev C Nucl Phys 1992; 45:1791-1802. [PMID: 9967932 DOI: 10.1103/physrevc.45.1791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Sorenson DS, Aslanoglou X, Brady FP, Drummond JR, Haight RC, Howell CR, King NS, Ling A, Lisowski PW, Park BK, Rapaport J, Romero JL, Tornow W, Ullmann JL. Energy dependence of the Gamow-Teller strength in p-shell nuclei observed in the (n,p) reaction. Phys Rev C Nucl Phys 1992; 45:R500-R503. [PMID: 9967833 DOI: 10.1103/physrevc.45.r500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ling A, Aslanoglou X, Brady FP, Finlay RW, Haight RC, Howell CR, King NS, Lisowski PW, Park BK, Rapaport J, Romero JL, Sorenson DS, Tornow W, Ullmann JL. Ground-state Gamow-Teller strength in 64Ni(n,p)64Co cross sections at 90-240 MeV. Phys Rev C Nucl Phys 1991; 44:2794-2800. [PMID: 9967715 DOI: 10.1103/physrevc.44.2794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Brady FP, Ford TD, Needham GA, Romero JL, Sorenson DS, Castaneda CM, Drummond JL, Hjort EL, McEachern B, King NS, Millener DJ. 12C(n,p)12B reaction at 56, 60, and 65 MeV. Phys Rev C Nucl Phys 1991; 43:2284-2302. [PMID: 9967279 DOI: 10.1103/physrevc.43.2284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Hart L, Donovan RM, Goldstein E, Brady FP. Detection of human immunodeficiency virus in infected CEM cells using fluorescent DNA probes and a laser-based computerized image cytofluorometry system. Anal Quant Cytol Histol 1990; 12:127-34. [PMID: 2112391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Quantitative nonradioactive methods to measure the human immunodeficiency virus (HIV) in individually infected cells are needed for the direct assessment of HIV infection, for the evaluation of antiviral chemotherapy and for testing the efficacy of vaccines. As a first step in accomplishing this goal, we built an argon ion laser-based computerized image cytofluorometry (ALCIC) system and determined this instrument's ability to quantitatively measure HIV nucleotides in infected lymphocytes. ALCIC consisted of a 43-mW argon ion laser connected to a Zeiss Universal microscope via a fiberoptic cable, a charged coupled-device video camera, a video frame grabber and array processor and a Micro Vax II computer using computer programs written in FORTRAN. HIV RNA and DNA were detected in infected CEM lymphocytes in culture by in situ hybridization using acetylaminofluorene (AAF)-labeled HIV-DNA probes, a rabbit anti-AAF antibody and a fluorescein-labeled goat anti-rabbit antibody. ALCIC measurements showed that 61% of the CEM cells were infected and that quantitative differences were distinguishable within this group. The levels of fluorescein isothiocyanate (FITC) fluorescence were sixfold or more greater than that observed with the same system using a 100-W mercury lamp for illumination; the improved intensity of the laser-based system is due to greater excitation intensity of the laser and the matching of the excitation spectrum to the peak wavelength of FITC. ALCIC has potential clinical value for determining the effect of antiviral agents on HIV infection and for assessing the susceptibility of different cell types to infection.
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Affiliation(s)
- L Hart
- Department of Physics, University of California, Davis 95616
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Brady FP, Ford TD, Romero JL, Castaneda CM, Drummond JR, Hjort EL, King NS, McEachern B, Sorenson DS, Aung Z, Klein A, Love WG, Wambach JK. Gamow-Teller and spin-dipole strength in 90Zr(n,p) at 65 MeV. Phys Rev C Nucl Phys 1989; 40:475-478. [PMID: 9966003 DOI: 10.1103/physrevc.40.r475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Hjort EL, Brady FP, Romero JL, Drummond JR, Hamilton MA, McEachern B, Smith RD, Brown VR, Petrovich F, Madsen VA. Pb(n,n'x) at 65 MeV and the isospin structure of the giant quadrupole resonance region. Phys Rev Lett 1989; 62:870-873. [PMID: 10040359 DOI: 10.1103/physrevlett.62.870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Brady FP, Christie WB, Romero JL, Tull CE, McEachern B, Webb ML, Young JC, Crawford HJ, Greiner DE, Lindstrom PJ, Sann H. Large pT from the fragmentation of 1.2-GeV/nucleon 139La nuclei. Phys Rev Lett 1988; 60:1699-1702. [PMID: 10038117 DOI: 10.1103/physrevlett.60.1699] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Subramanian TS, Romero JL, Brady FP, Fitzgerald DH, Garrett R, Needham GA, Ullmann JL, Watson JW, Zanelli CI, Brenner DJ, Prael RE. Double-differential inclusive hydrogen and helium spectra from neutron-induced reactions at 27.4, 39.7, and 60.7 MeV: Oxygen and nitrogen. Phys Rev C Nucl Phys 1986; 34:1580-1587. [PMID: 9953626 DOI: 10.1103/physrevc.34.1580] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Klages HO, Brady FP, Doll P, Garrett R, Hansmeyer J, Heeringa W, Hiebert JC, Hofmann K, Jany P, Krupp H, Maier C, Nitz W, Wilczynski J. Few nucleon experiments with fast polarized neutrons. ACTA ACUST UNITED AC 1986. [DOI: 10.1080/00337578608208378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Zanelli CI, Brady FP, Romero JL, Castaneda CM, Johnson DL. Neutron total cross section in Ca and Fe at 35.3, 40.3, and 50.4 MeV. Phys Rev C Nucl Phys 1986; 33:66-70. [PMID: 9953120 DOI: 10.1103/physrevc.33.66] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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