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

作者：Ye Wei^*; Wang Ning

来源：Nuclear Science and Techniques, 2013, 24(5): 050521.

• Spallation reaction
• Nuclear dissipation
• Excitation energy at scission

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 (E-sc*) to the nuclear friction strength (beta). It is shown that the sensitivity is enhanced substantially with increasing E*. Moreover, we find that the significant sensitivity of E-sc* to beta 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 E-sc* 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.

• 出版日期2013-10
• 单位东南大学