Decay mechanism of a highly excited nucleus produced in the reaction at 10.6 MeV/nucleon
1996; Elsevier BV; Volume: 607; Issue: 1 Linguagem: Inglês
10.1016/0375-9474(96)00223-0
ISSN1873-1554
AutoresYasuyuki Futami, K. Yuasa-Nakagawa, T. Nakagawa, S.M. Lee, K. Furutaka, K. Matsuda, K. Yoshida, S. C. Jeong, H. Fujiwara, T. Mizota, Yuji Honjo, S. Tomita, B. Heusch, K. Ieki, J. Kasagi, W. Q. Shen, T. Matsuse,
Tópico(s)Advanced Chemical Physics Studies
ResumoThe cross section, energy distribution and angular distribution of complex fragments emitted in the reaction 84Kr + 27Al at the incident energy of 10.6 MeV/nucleon were measured to study the decay mechanism of a highly excited nucleus. Through coincidence measurements between the light charged particles and the binary decay fragments it is found that the pre-scission charge multiplicity is about 80% of the total one. The experimental distributions are well reproduced by the Extended Hauser-Feshbach Method (EHFM), introducing a cut-off energy of the excitation energy of fragments Ecut-off. The fission delay time is determined to be 2 × 10−20 seconds. The role and the physical meaning of Ecut-off is discussed.
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