排序方式: 共有6条查询结果,搜索用时 15 毫秒
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Pochodzalla J Möhlenkamp T Rubehn T Schüttauf A Wörner A Zude E Begemann-Blaich M Blaich T Emling H Ferrero A Gross C Immé G Iori I Kunde GJ Kunze WD Lindenstruth V Lynen U Moroni A Müller WF Ocker B Raciti G Sann H Schwarz C Seidel W Serfling V Stroth J Trautmann W Trzcinski A Tucholski A Verde G Zwieglinski B 《Physical review letters》1995,75(6):1040-1043
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Th. Rubehn W. F. J. Müller R. Bassini M. Begemann-Blaich Th. Blaich A. Ferrero C. Groß G. Imme I. Iori G. J. Kunde W. D. Kunze V. Lindenstruth U. Lynen T. Möhlenkamp L. G. Moretto B. Ocker J. Pochodzalla G. Raciti S. Reito H. Sann A. Schüttauf W. Seidel V. Serfling W. Trautmann A. Trzcinski G. Verde A. Wörner E. Zude B. Zwieglinski 《Zeitschrift für Physik A Hadrons and Nuclei》1995,353(2):197-204
Electromagnetic fission of238U projectiles at E/A =600 and 1000 MeV was studied with the ALADIN spectrometer at the heavy-ion synchrotron SIS. Seven different targets (Be, C, Al, Cu, In, Au and U) were used. By considering only those fission events where the two charges added up to 92, most of the nuclear interactions were excluded. The nuclear contributions to the measured fission cross sections were determined by extrapolating from beryllium to the heavier targets with the concept of factorization. The obtained cross sections for electromagnetic fission are well reproduced by extended Weizsäcker-Williams calculations which include E1 and E2 excitations. The asymmetry of the fission fragments' charge distribution gives evidence for the excitation of the double giant-dipole resonance in uranium.Communicated by V. Metag 相似文献
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Kunde GJ Hsi WC Kunze WD Schüttauf A Wörner A Begemann-Blaich M Blaich T Bowman DR Charity RJ Cosmo A Ferrero A Gelbke CK Hubele J Immé G Iori I Kreutz P Lindenstruth V Lisa MA Lynch WG Lynen U Mang M Möhlenkamp T Moroni A Müller WF Neumann M Ocker B Ogilvie CA Peaslee GF Pochodzalla J Raciti G Rubehn T Sann H Seidel W Serfling V Sobotka LG Stroth J Stuttge L Tomasevic S Trautmann W Tsang MB Tucholski A Verde G Williams CW Zude E Zwieglinski B 《Physical review letters》1995,74(1):38-41
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Hongfei Xi T. Odeh R. Bassini M. Begemann-Blaich A. S. Botvina S. Fritz S. J. Gaff C. Groß G. Immé I. Iori U. Kleinevoß G. J. Kunde W. D. Kunze U. Lynen V. Maddalena M. Mahi T. Möhlenkamp A. Moroni W. F. J. Müller C. Nociforo B. Ocker F. Petruzzelli J. Pochodzalla G. Raciti G. Riccobene F. P. Romano Th. Rubehn A. Saija M. Schnittker A. Schüttauf C. Schwarz W. Seidel V. Serfling C. Sfienti W. Trautmann A. Trzcinski G. Verde A. Wörner B. Zwieglinski 《Zeitschrift für Physik A Hadrons and Nuclei》1997,359(4):397-406
Breakup temperatures were deduced from double ratios of isotope yields for target spectators produced in the reaction 197Au + 197Au at 1000 MeV per nucleon. Pairs of 3,4He and 6,7Li isotopes and pairs of 3,4He and H isotopes (p, d and d, t) yield consistent temperatures after feeding corrections, based on the quantum statistical model, are applied. The temperatures rise with decreasing impact parameter from 4 MeV for peripheral to about 10 MeV for the most central collisions. The good agreement with the breakup temperatures measured previously for projectile spectators at an incident energy of 600 MeV per nucleon confirms the universality established for the spectator decayat relativistic bombarding energies. The measured temperatures also agree with the breakup temperatures predicted by the statistical multifragmentation model. For these calculations a relation between the initial excitation energy and mass was derived which gives good simultaneous agreement for the fragment charge correlations. The energy spectra of light charged particles, measured at τlab = 150°, exhibit Maxwellian shapes with inverse slope parameters much higher than the breakup temperatures. The statistical multifragmentation model, because Coulomb repulsion and sequential decay processes are included, yields light-particle spectra with inverse slope parameters higher than the breakup temperatures but considerably below the measured values. The systematic behavior of the differences suggests that they are caused by light-charged-particle emission prior to the final breakup stage. 相似文献
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Pochodzalla J Möhlenkamp T Rubehn T Schüttauf A Wörner A Zude E Begemann-Blaich M Blaich T Emling H Ferrero A Gross C Immé G Iori I Kunde GJ Kunze WD Lindenstruth V Lynen U Moroni A Müller WF Ocker B Raciti G Sann H Schwarz C Seidel W Serfling V Stroth J Trautmann W Trzcinski A Tucholski A Verde G Zwieglinski B 《Physical review letters》1996,76(15):2823
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