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Van Den Heuvel N, Reijers I, Versluis J, Rozeman E, Jóźwiak K, Blommers K, Saw R, Suijkerbuijk K, Kapiteijn E, Van der Veldt A, Hospers G, Spillane A, Pennington T, Wouters M, Menzies A, van Akkooi A, de Poll-Franse LV, Long G, Blank C, Boekhout A. 1085P Health-related quality of life in stage III melanoma patients treated with neoadjuvant ipilimumab and nivolumab followed by index lymph node excision only versus therapeutic lymph node dissection: 24-week results of the PRADO trial. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Nassar H, Paul M, Ahmad I, Ben-Dov Y, Caggiano J, Ghelberg S, Goriely S, Greene JP, Hass M, Heger A, Heinz A, Henderson DJ, Janssens RVF, Jiang CL, Kashiv Y, Nara Singh BS, Ofan A, Pardo RC, Pennington T, Rehm KE, Savard G, Scott R, Vondrasek R. 40Ca(alpha, gamma)44Ti reaction in the energy regime of supernova nucleosynthesis. Phys Rev Lett 2006; 96:041102. [PMID: 16486801 DOI: 10.1103/physrevlett.96.041102] [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: 08/31/2005] [Indexed: 05/06/2023]
Abstract
The 44Ti(t1/2=59 yr) nuclide, an important signature of supernova nucleosynthesis, has recently been observed as live radioactivity by gamma-ray astronomy from the Cas A remnant. We investigate in the laboratory the major 44Ti production reaction 40Ca(alpha, gamma)44Ti (Ec.m. approximately 0.6-1.2 MeV/u by direct off-line counting of 44Ti nuclei. The yield, significantly higher than inferred from previous experiments, is analyzed in terms of a statistical model using microscopic nuclear inputs. The associated stellar rate has important astrophysical consequences, increasing the calculated supernova 44Ti yield by a factor approximately 2 over previous estimates and bringing it closer to Cas A observations.
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Affiliation(s)
- H Nassar
- Racah Institute of Physics, Hebrew University, 91904 Jerusalem, Israel
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Nassar H, Paul M, Ahmad I, Berkovits D, Bettan M, Collon P, Dababneh S, Ghelberg S, Greene JP, Heger A, Heil M, Henderson DJ, Jiang CL, Käppeler F, Koivisto H, O'Brien S, Pardo RC, Patronis N, Pennington T, Plag R, Rehm KE, Reifarth R, Scott R, Sinha S, Tang X, Vondrasek R. Stellar (n,gamma) cross section of 62Ni. Phys Rev Lett 2005; 94:092504. [PMID: 15783960 DOI: 10.1103/physrevlett.94.092504] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2004] [Revised: 12/15/2004] [Indexed: 05/24/2023]
Abstract
The 62Ni(n,gamma)63Ni(t(1/2)=100+/-2 yr) reaction plays an important role in the control of the flow path of the slow neutron-capture (s) nucleosynthesis process. We have measured for the first time the total cross section of this reaction for a quasi-Maxwellian (kT=25 keV) neutron flux. The measurement was performed by fast-neutron activation, combined with accelerator mass spectrometry to detect directly the 63Ni product nuclei. The experimental value of 28.4+/-2.8 mb, fairly consistent with a recent calculation, affects the calculated net yield of 62Ni itself and the whole distribution of nuclei with 62<A<90 produced by the weak s process in massive stars.
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Affiliation(s)
- H Nassar
- Racah Institute of Physics, Hebrew University, Jerusalem, Israel, 91904
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Winter WT, Freedman SJ, Rehm KE, Ahmad I, Greene JP, Heinz A, Henderson D, Janssens RVF, Jiang CL, Moore EF, Mukherjee G, Pardo RC, Pennington T, Savard G, Schiffer JP, Seweryniak D, Zinkann G, Paul M. Determination of the 8B neutrino spectrum. Phys Rev Lett 2003; 91:252501. [PMID: 14754108 DOI: 10.1103/physrevlett.91.252501] [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: 03/19/2003] [Revised: 09/22/2003] [Indexed: 05/24/2023]
Abstract
We have measured the total energy of the alpha particles following the beta decay of 8B by implanting 8B into a planar silicon surface barrier detector. Calibration was performed using alpha particles following the beta decay of 20Na, similarly implanted. The alpha spectrum is used to infer the 8B neutrino spectrum which is an important input in the interpretation of experiments that detect energetic neutrinos from the Sun. The alpha spectrum reported here is in disagreement with the previous best measurement which used two detectors in coincidence.
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Affiliation(s)
- W T Winter
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Rehm KE, Jiang CL, Ahmad I, Caggiano J, Collon P, Greene JP, Henderson D, Heinz A, Janssens RVF, Pardo RC, Pennington T, Schiffer JP, Siemssen RH, Wuosmaa AH, Paul M, Mohr P. Large angle elastic alpha scattering on a N=Z nucleus above A=40. Phys Rev Lett 2002; 89:132501. [PMID: 12225019 DOI: 10.1103/physrevlett.89.132501] [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: 05/06/2002] [Indexed: 05/23/2023]
Abstract
Scattering of alpha particles from 44Ti, the lightest unstable alpha-particle nucleus above A=40, has been measured at backward angles. The "anomalous" order-of-magnitude enhancement that is characteristic of 40Ca and other light alpha-particle nuclei is not observed. Instead, the backward yield is similar to that observed for other nuclei heavier than 40Ca, and is well described with average optical model parameters.
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Affiliation(s)
- K E Rehm
- Argonne National Laboratory, Argonne, Illinois 60439, USA
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Pennington T, Wang A, Xaio H, May R. Manufacturing of a fiber optic Young's double pinhole interferometer for use as a 3-D profilometer. Opt Express 2000; 6:196-201. [PMID: 19404351 DOI: 10.1364/oe.6.000196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The method used to manufacture a Young's double pinhole interferometer is dis ussed. This interferometer is destined to be used in a surface profilometer using two wavelengths so that the zero order fringe can be determined. Hence stringent requirements are placed on the absolute length difference between the two output fibers of a single mode coupler. These requirements are discussed along with the manufacturing process. The interferometer is shown along with measurements showing a length difference on the order of 6microm.
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Adriani O, Ahlen S, Ambrosi G, Babucci E, Barbagli G, Baschirotto A, Battiston R, Bay A, Bencze G, Bene P, Bertucci B, Biasini M, Bilei G, Boissevain J, Bosetti M, Brooks M, Busenitz J, Burger W, Camps C, Caria M, Castellini G, Castello R, Checcucci B, Chen A, Chen W, Coan T, Commichau V, DiBitonto D, Easo S, Extermann P, Fiandrini E, Gougas A, Hangarter K, Hauviller C, Herve A, Hofer H, Kapustinski J, Kinnison W, Kirst H, Krastev V, Landi G, Lebeau M, Lecoq P, Lee D, Leiste R, Lin W, Lohmann W, Lübelsmeyer K, MacDermott M, Marin A, Masciocchi F, Matay G, Miller G, Mills G, Nowak H, Passaleva G, Pennington T, Paul T, Pauluzzi M, Pensotti S, Perrin E, Rancoita P, Rattaggi M, Richeux JP, Santocchia A, Sachwitz M, Schmitz P, Schöneich B, Servoli L, Siedling R, Subhani K, Terzi G, Thompson T, Tonisch F, Trowitzsch G, Viertel G, Vogt H, Waldmeier S, Wang S, Weill R, Yeh S, Zhou B. Status of the L3 silicon microvertex detector. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0920-5632(93)90025-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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