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Sargsyan V, Adamian G, Antonenko N, Scheid W, Zhang H. Fusion at near-barrier energies within the quantum diffusion approach. EPJ Web of Conferences 2014. [DOI: 10.1051/epjconf/20136900015] [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: 11/14/2022] Open
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Sargsyan VV, Adamian GG, Antonenko NV, Scheid W, Zhang HQ. Role of neutron transfer and deformation effect in capture process at sub-barrier energies. EPJ Web of Conferences 2012. [DOI: 10.1051/epjconf/20123809005] [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: 11/14/2022] Open
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Sargsyan V, Kuzyakin R, Adamian G, Antonenko N, Scheid W, Zhang H. Sub-barrier capture with quantum diffusion approach. EPJ Web of Conferences 2011. [DOI: 10.1051/epjconf/20111704003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kalandarov SA, Kanokov Z, Adamian GG, Antonenko NV, Scheid W. Non-Markovian dynamics of an open quantum system with nonstationary coupling. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 83:041104. [PMID: 21599112 DOI: 10.1103/physreve.83.041104] [Citation(s) in RCA: 3] [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: 09/18/2010] [Revised: 12/18/2010] [Indexed: 05/30/2023]
Abstract
The spectral, dissipative, and statistical properties of the damped quantum oscillator are studied in the case of non-Markovian and nonstationary system-heat bath coupling. The dissipation of collective energy is shown to be slowed down, and the decoherence rate and entropy grow with modulation frequency.
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Affiliation(s)
- S A Kalandarov
- Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
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Brandau C, Kozhuharov C, Müller A, Schippers S, Beckert K, Beller P, Bernhardt D, Bosch F, Böhm S, Currell F, Franzke B, Gumberidze A, Harman Z, Jacobi J, Mokler P, Nolden F, Scheid W, Schmidt E, Spillman U, Stachura Z, Steck M, Stöhlker T. First dielectronic recombination measurements with H-like uranium. Radiat Phys Chem Oxf Engl 1993 2006. [DOI: 10.1016/j.radphyschem.2005.07.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Palchikov YV, Kanokov Z, Adamian GG, Antonenko NV, Scheid W. Non-Markovian dynamics of quantum systems. II. Decay rate, capture, and pure states. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:016122. [PMID: 15697673 DOI: 10.1103/physreve.71.016122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Indexed: 05/24/2023]
Abstract
On the basis of a master equation for the reduced density matrix of open quantum systems, we study the influence of time-dependent friction and diffusion coefficients on the decay rate from a potential well and the capture probability into a potential well. Taking into account the mixed diffusion coefficient Dqp, the quasistationary decay rates are compared with the analytically derived Kramers-type formulas for different temperatures and frictions. The diffusion coefficients supplying the purity of states are derived for a non-Markovian dynamics.
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Affiliation(s)
- Yu V Palchikov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
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Kanokov Z, Palchikov YV, Adamian GG, Antonenko NV, Scheid W. Non-Markovian dynamics of quantum systems. I. Formalism and transport coefficients. Phys Rev E Stat Nonlin Soft Matter Phys 2005; 71:016121. [PMID: 15697672 DOI: 10.1103/physreve.71.016121] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Indexed: 05/24/2023]
Abstract
Generalized Langevin equations and fluctuation-dissipation relations are derived for the case of a nonlinear non-Markovian noise. The explicit expressions for the time-dependent friction and diffusion coefficients are presented for the case of general and linear couplings in the coordinate and momentum between the collective harmonic oscillator and heat bath. The long-time tails of correlation functions are investigated in the low- and high-temperature regimes of dissipation for different couplings. The Onsager's regression hypothesis is discussed for the non-Markovian dynamics. The Lindblad theory is justified on the basis of the microscopical model.
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Affiliation(s)
- Z Kanokov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
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Brandau C, Kozhuharov C, Müller A, Shi W, Schippers S, Bartsch T, Böhm S, Böhme C, Hoffknecht A, Knopp H, Grün N, Scheid W, Steih T, Bosch F, Franzke B, Mokler PH, Nolden F, Steck M, Stöhlker T, Stachura Z. Precise determination of the 2s(1/2)-2p(1/2) splitting in very heavy lithiumlike ions utilizing dielectronic recombination. Phys Rev Lett 2003; 91:073202. [PMID: 12935014 DOI: 10.1103/physrevlett.91.073202] [Citation(s) in RCA: 11] [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: 12/19/2002] [Indexed: 05/24/2023]
Abstract
The 2s(1/2)-2p(1/2) energy splittings DeltaE(L) of the lithiumlike ions 19779Au76+, 20882Pb79+, and 23892U89+ have been measured at the Experimental Storage Ring, utilizing low energy dielectronic recombination. The resonance energies in total 41 different 1s(2) 2p(1/2)nl(j(')) (n > or =20) autoionizing Rydberg states populated in the dielectronic capture process have been determined. The 2s(1/2)-->2p(1/2) excitation energies have been obtained by extrapolation of these resonance energies to the associated series limits n--> infinity. The combined analysis of the experimental data for all three ions yields DeltaE(L)=216.134(96) eV for Au76+, 230.650(81) eV for Pb79+, and 280.516(99) eV for U89+.
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Affiliation(s)
- C Brandau
- Institut für Kernphysik, Justus-Liebig-Universität, D-35392 Giessen, Germany
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Brandau C, Bartsch T, Hoffknecht A, Knopp H, Schippers S, Shi W, Müller A, Grün N, Scheid W, Steih T, Bosch F, Franzke B, Kozhuharov C, Mokler PH, Nolden F, Steck M, Stöhlker T, Stachura Z. High Rydberg resonances in dielectronic recombination of pb(79+). Phys Rev Lett 2002; 89:053201. [PMID: 12144440 DOI: 10.1103/physrevlett.89.053201] [Citation(s) in RCA: 4] [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: 12/21/2001] [Indexed: 05/23/2023]
Abstract
Dielectronic recombination resonances of Pb (79+) associated with 2s(1/2)-->2p(1/2) excitations were measured at the heavy-ion storage ring ESR at GSI. The fine structure of the energetically lowest resonance manifold Pb (78+)(1s(2)2p(1/2)20l(j)) at around 18 eV could partially be resolved, and rate coefficients on an absolute scale were obtained. A comparison of the experimental data with results of a fully relativistic theoretical approach shows that high-angular-momentum components up to j=31/2 significantly contribute to the total resonance strength demonstrating the necessity to revise the widespread notion of negligible high-angular-momentum contributions at least for very highly charged ions.
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Affiliation(s)
- C Brandau
- Institut für Kernphysik, Justus-Liebig-Universität, D-35392 Giessen, Germany
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Wang JX, Scheid W, Hoelss M, Ho YK. Comment on "Vacuum electron acceleration by coherent dipole radiation". Phys Rev E Stat Nonlin Soft Matter Phys 2002; 65:028501. [PMID: 11863702 DOI: 10.1103/physreve.65.028501] [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: 07/20/2000] [Indexed: 05/23/2023]
Abstract
Troha et al. [Phys. Rev. E 60, 926 (1999)] put forward a generalized Lawson-Woodward theorem in the study of laser accelerations. We point out that one of the assumptions used in their proof does not stand on a solid physical ground and that it is possible for electrons to obtain net energy gains from a plane-wave laser pulse in vacuum even if the radiation reaction effects are neglected.
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Wang JX, Scheid W, Hoelss M, Ho YK. Fifth-order corrected field descriptions of the Hermite-Gaussian (0,0) and (0,1) mode laser beam. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 64:066612. [PMID: 11736301 DOI: 10.1103/physreve.64.066612] [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: 05/28/2001] [Indexed: 05/23/2023]
Abstract
In this paper, we extend the work of Barton and Alexander [J. App. Phys. 66, 2800 (1989)] on the fifth-order corrected field expressions for a Hermite-Gaussian (0,0) mode laser beam to more general cases with adjustable parameters. The parametric dependence of the electron dynamics is investigated by numerical methods. Finally, the fifth-order corrected field equations for the Hermite-Gaussian (0,1) mode are also presented.
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Affiliation(s)
- J X Wang
- Institut für Theoretische Physik der Justus Liebig-Universität, Giessen, Germany.
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Isar A, Sandulescu A, Scheid W. Purity and decoherence in the theory of a damped harmonic oscillator. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1999; 60:6371-81. [PMID: 11970551 DOI: 10.1103/physreve.60.6371] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/1998] [Revised: 08/02/1999] [Indexed: 04/18/2023]
Abstract
For the generalized master equations derived by Karrlein and Grabert for the microscopic model of a damped harmonic oscillator, the conditions for purity of states are written, in particular for different initial conditions and different types of damping, including Ohmic, Drude, and weak coupling cases, and the Agarwal and Weidlich-Haake models. It is shown that the states which remain pure are the squeezed states with variances that are constant in time. For pure states, generalized nonlinear Schrödinger-type equations corresponding to these master equations are also obtained. Then the condition for purity of states of a damped harmonic oscillator is considered in the framework of Lindblad theory for open quantum systems. For a special choice of the environment coefficients, correlated coherent states with constant variances and covariance are shown to be the only states which remain pure all the time during the evolution of the considered system. In Karrlein-Grabert and Lindblad models, as well as in the particular models considered, expressions for the rate of entropy production are written, and it is shown that state which preserve their purity in time are also states which minimize entropy production and, therefore, are the most stable state under evolution in the presence of the environment, and play an important role in the description of decoherence phenomenon.
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Affiliation(s)
- A Isar
- Department of Theoretical Physics, Institute of Atomic Physics, Bucharest-Magurele, Romania.
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Wang JX, Ho YK, Feng L, Kong Q, Wang PX, Yuan ZS, Scheid W. High-intensity laser-induced electron acceleration in vacuum. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1999; 60:7473-8. [PMID: 11970695 DOI: 10.1103/physreve.60.7473] [Citation(s) in RCA: 6] [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: 05/17/1999] [Indexed: 04/18/2023]
Abstract
In this paper, an approximate pulsed-laser-beam solution of Maxwell's equation in vacuum is derived. Then with the numerical simulation method, electron acceleration induced by high-intensity [Q(0)=eE(0)/(m(e)omega c)=3] lasers is discussed in connection with the recent experiment of Malka et al. It is found that the maximum energy gain and the relationship between the final energy and the scattering angle can be well reproduced, but the polarization effect of electron-laser interactions is not very prominent. These results show that the ponderomotive potential model is still applicable, which means that the stimulated Compton scattering is the main fundamental mechanism responsible for the electron acceleration at this laser intensity.
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Affiliation(s)
- J X Wang
- Institute of Modern Physics, Fudan University, Shanghai 200433, China
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Boreham BW, Bolton P, Newman D, Hora H, Aydin M, Azechi H, Cicchitelli L, Eliezer S, Goldsworthy M, Häuser T, Kasotakis G, Kitagawa Y, Martinez-Val JM, Mima K, Murakami M, Nishihara K, Piera M, Ray P, Scheid W, Sarris E, Stening R, Takabe H, Velarde G, Yamanaka M, Yamanaka T, Castillo R, Osman F. Beam matter interaction physics for fast ignitors. Fusion Engineering and Design 1999. [DOI: 10.1016/s0920-3796(98)00277-4] [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: 10/18/2022]
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Grun N, Scheid W. Calculation of the impact parameter dependence of the charge exchange for Li3++H at 10.5 keV by the finite difference method. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/16/14/007] [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: 11/12/2022]
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Becker U, Grun N, Scheid W. Solution of the time-dependent Dirac equation by the finite difference method and application for Ca20++U91+. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/16/11/017] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [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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Becker U, Grun N, Scheid W. Direct electron-positron pair production in relativistic heavy-ion collisions in the semiclassical approximation. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/19/9/015] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Yamaji S, Scheid W, Fink HJ, Greiner W. On the production of superheavy elements due to collective mass transfer in the collision238U-238U. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4616/2/11/002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Eichenauer D, Grun N, Scheid W. Classical trajectory calculations for H+-H collisions with the Wigner function as initial phase space distribution. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/14/20/017] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.8] [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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Momberger K, Grun N, Scheid W, Becker U, Soff G. Muon pair production with inner-shell capture in relativistic U92+-U92+collisions. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/20/9/003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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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Terlecki G, Grun N, Scheid W. Trajectory method for the solution of the time-dependent Schrodinger equation in atomic physics and application to H+-H scattering. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/17/18/011] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Eichenauer D, Grun N, Scheid W. Classical-trajectory calculations of the differential cross section for charge transfer in H+-H collisions. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/15/1/004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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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Gramlich K, Grun N, Scheid W. The time-dependent Hartree-Fock method within a Gauss-lobe basis and application to proton-He collisions. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/19/10/015] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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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Förster W, Scheid W, Weber J, Schürenberg M, Traut H, Busse H. Fluence and mutagenic side effects of excimer laser radiation applied in ophthalmology in human lymphocytes in vitro. Acta Ophthalmol Scand 1997; 75:124-7. [PMID: 9197554 DOI: 10.1111/j.1600-0420.1997.tb00105.x] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PURPOSE To investigate the influence of different fluences in 193 and 248 nm excimer laser radiation on the yields of chromatid and chromosome aberrations induced in human lymphocytes in vitro. METHOD Heparinized human blood was exposed to 193 or 248 nm excimer laser radiation. The fluence was gradually increased from 21 to 400 mJ/cm2 in 193 nm (constant total energy of 250 J) and from 150 to 377 mJ/cm2 in 248 nm radiation (constant total energy of 500 J). Chromatid and chromosome aberrations were then analysed microscopically. RESULTS The yields of chromatid breaks and achromatic lesions depend on the fluence per pulse. This dependence contains a linear component, indicating a threshold of about 70 mJ/cm2 fluence in 193 nm and of about 250 mJ/cm2 fluence in 248 nm laser radiation. An increase of the yield of dicentric chromosomes could only be observed at the highest fluence tested (377 mJ/cm2) in the 248 nm series. Over 126 mJ/cm2 in 193 nm radiation no lymphocytes could be cultured and therefore no aberrations could be found. CONCLUSIONS Our findings show that the fluence of 193 nm and of 248 nm excimer laser radiation has an effect on the yields of chromatid breaks and achromatic lesions in human lymphocytes under in vitro conditions.
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Affiliation(s)
- W Förster
- University Eye Hospital Munster, Germany
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Eberspächer M, Apagyi B, Scheid W. Solution of a Coupled Channel Inverse Scattering Problem at Fixed Energy by a Modified Newton-Sabatier Method. Phys Rev Lett 1996; 77:1921-1924. [PMID: 10061813 DOI: 10.1103/physrevlett.77.1921] [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: 05/23/2023]
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Stefanescu E, Scheid W, Sandulescu A, Greiner W. Cold fission as cluster decay with dissipation. Phys Rev C Nucl Phys 1996; 53:3014-3021. [PMID: 9971289 DOI: 10.1103/physrevc.53.3014] [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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Schmidt J, Scheid W. Molecular states in the equator-equator orientation of two oblately deformed 12C nuclei. Phys Rev C Nucl Phys 1996; 53:322-333. [PMID: 9970942 DOI: 10.1103/physrevc.53.322] [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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35
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Gupta RK, Singh S, Münzenberg G, Scheid W. Neutron-halo nuclei in cold synthesis and cluster decay of heavy nuclei: Z=104 nucleus as an example. Phys Rev C Nucl Phys 1995; 51:2623-2629. [PMID: 9970347 DOI: 10.1103/physrevc.51.2623] [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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36
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Silisteanu I, Scheid W. Half-lives of cluster radioactivity within a model including superfluid phenomena and resonance effects. Phys Rev C Nucl Phys 1995; 51:2023-2030. [PMID: 9970271 DOI: 10.1103/physrevc.51.2023] [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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Abstract
The yield of chromosome aberrations (dicentric and ring chromosomes) was determined for five patients who had been extensively exposed to diagnostic x rays. Remarkably high aberration yields were obtained for each of them leading to correspondingly high equivalent whole body doses ("biological dosimetry"). The contribution of iodized contrast media and computing tomography to the biologically estimated doses is discussed.
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Affiliation(s)
- J Weber
- Institute of Radiation Biology, University of Münster, F.R.G
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Antonenko NV, Ivanova SP, Jolos RV, Scheid W. Light nuclei production in fusion of heavy ions. Phys Rev C Nucl Phys 1994; 50:2063-2068. [PMID: 9969883 DOI: 10.1103/physrevc.50.2063] [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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39
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Heumann D, Greiner M, Scheid W, Braunss G. Spin-dependent generalized collective model in relation to the j=3/2 interacting boson fermion model. Phys Rev C Nucl Phys 1994; 50:812-817. [PMID: 9969723 DOI: 10.1103/physrevc.50.812] [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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40
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Apagyi B, Schmidt A, Scheid W, Voit H. 12C+12C elastic scattering potentials obtained by unifying phase-shift analysis with the modified Newton-Sabatier inverse method. Phys Rev C Nucl Phys 1994; 49:2608-2617. [PMID: 9969510 DOI: 10.1103/physrevc.49.2608] [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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41
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Scheid W, Weber J, Traut H, Gabriel HW. Chromosome aberrations induced in the lymphocytes of pilots and stewardesses. Naturwissenschaften 1993; 80:528-30. [PMID: 8264808 DOI: 10.1007/bf01140813] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- W Scheid
- Institut für Strahlenbiologie der Universität, Münster
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Cseh J, Lévai G, Scheid W. Algebraic 12C+12C cluster model of the 24Mg nucleus. Phys Rev C Nucl Phys 1993; 48:1724-1738. [PMID: 9969016 DOI: 10.1103/physrevc.48.1724] [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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Abstract
Sixteen people (15 from Byelorussia, one from Kiev) possibly exposed to radioactivity released by the Chernobyl accident were investigated for chromosome aberrations induced in lymphocytes. Statistically significant increases of the yield of dicentric chromosomes were observed in five people.
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Affiliation(s)
- W Scheid
- Institute of Radiation Biology, University of Münster, F.R.G
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Gupta RK, Singh S, Puri RK, Scheid W. Instabilities against exotic cluster decays in "stable" nuclei with Z and N in the neighborhood of spherical and deformed closed shells. Phys Rev C Nucl Phys 1993; 47:561-566. [PMID: 9968472 DOI: 10.1103/physrevc.47.561] [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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45
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Spies W, Müller A, Linkemann J, Frank A, Wagner M, Kozhuharov C, Franzke B, Beckert K, Bosch F, Eickhoff H, Jung M, Klepper O, König W, Mokler PH, Moshammer R, Nolden F, Schaaf U, Spädtke P, Steck M, Zimmerer P, Grün N, Scheid W, Pindzola MS, Badnell NR. Dielectronic and radiative recombination of lithiumlike gold. Phys Rev Lett 1992; 69:2768-2771. [PMID: 10046584 DOI: 10.1103/physrevlett.69.2768] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [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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46
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Thiel J, Bunker A, Momberger K, Grün N, Scheid W. Electron-positron pair creation with capture and ionization in relativistic heavy-ion collisions by the finite-difference method. Phys Rev A 1992; 46:2607-2612. [PMID: 9908419 DOI: 10.1103/physreva.46.2607] [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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47
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Lévai G, Cseh J, Scheid W. Semimicroscopic algebraic study of the alpha -cluster states of the 18O nucleus. Phys Rev C Nucl Phys 1992; 46:548-557. [PMID: 9968149 DOI: 10.1103/physrevc.46.548] [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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48
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Abstract
The amount of time-saving by using the Metafer2 metaphase finder for routine analysis of radiation-induced chromosome aberrations (biological dosimetry) was determined. Metaphases were prepared by standard methods from cultures of human peripheral blood lymphocytes and stained either with Giemsa or with the FPG method. The metaphase finder was used for detecting metaphases on the microscope slides and for automatically processing the evaluation data. In our laboratory, standardized analysis of 1000 metaphases requires at least 3 working days for cell culturing and slide preparation and 51.5 working hours for cytogenetic analysis. When using the metaphase finder the time required for cytogenetic analysis is reduced to 17.3 working hours (time-saving factor: 51.5/17.3 h = 3.0). In our prolonged method, including more than one scoring of each slide and karyotyping of metaphases with chromosome aberrations, the analysis times for 1000 cells are 132 and 70 working hours, respectively (time saving factor: 132/70 h = 1.9).
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Affiliation(s)
- J Weber
- Institute of Radiation Biology, University of Münster, Germany
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49
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Abstract
The continuous accumulation of control data in multicellular mutagen screening systems prompted us to study the dependence of the statistical power on the size of the control sample (for fixed control values). Two widely used screening systems were chosen: dicentric chromosomes in human lymphocytes and recessive sex-linked lethals in Drosophila melanogaster. The power increases rapidly at first as the control sample size increases, then levels off at a few tens of thousands of control units tested and thereafter remains almost constant up to the historical control. The practical implications from our study are discussed.
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Affiliation(s)
- H Traut
- Institute of Radiation Biology, University of Münster, Germany
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50
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Häuser T, Scheid W, Hora H. Theory of ions emitted from a plasma by relativistic self-focusing of laser beams. Phys Rev A 1992; 45:1278-1281. [PMID: 9907099 DOI: 10.1103/physreva.45.1278] [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: 05/22/2023]
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