Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (5): 050521 doi: 10.13538/j.1001-8042/nst.2013.05.021

Special Issue: Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012)

• Special Section on International Workshop on Nuclear Dynamics in Heavy-Ion Reaction (IWND2012) • Previous Articles     Next Articles

Spallation reaction and the probe of nuclear dissipation with excitation energy at scission  

YE Wei* WANG Ning   

  1. Department of Physics, Southeast University, Nanjing 210096, China  
  • Received:2013-06-27
  • Contact: YE Wei E-mail: yewei@seu.edu.cn
  • Supported by:

    Supported by National Natural Science Foundation of China (NSFC) Projects (No.11075034)

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YE Wei, WANG Ning. Spallation reaction and the probe of nuclear dissipation with excitation energy at scission  .Nuclear Science and Techniques, 2013, 24(5): 050521     doi: 10.13538/j.1001-8042/nst.2013.05.021

Abstract:

We study in the framework of the Langevin model the influence of initial excitation energy (E*) of Hg compound nuclei (CNs) on the sensitivity of the excitation energy at scission (Esc*) to the nuclear friction strength (β). It is shown that the sensitivity is enhanced substantially with increasing E*. Moreover, we find that the significant sensitivity of Esc*  to β at high E* is little affected by a marked difference in the neutron-to-proton ratio of a CN and in its size and fissility. Our findings suggest that, on the experimental side, a measurement of Esc*  in energetic proton-induced spallation reactions can provide not only a sensitive but also a robust probe of nuclear dissipation in fission of highly excited nuclei. Further development of a suitable approach to spallation reaction is discussed.

Key words:  Spallation reaction, Nuclear dissipation, Excitation energy at scission