Dynamic properties of the energy loss of multi-MeV charged particles traveling in two-component warm dense plasmas

作者：Fu, Zhen-Guo; Wang, Zhigang; Li, Meng-Lei; Li, Da-Fang; Kang, Wei^*; Zhang, Ping

来源：Physical Review E, 2016, 94(6): 063203.

DOI：10.1103/PhysRevE.94.063203

• LINDHARD DIELECTRIC FUNCTION
• STOPPING POWER
• HEAVY-IONS
• VELOCITY
• SCATTERING

The energy loss of multi-MeV charged particles moving in two-component warm dense plasmas (WDPs) is studied theoretically beyond the random-phase approximation. The short-range correlations between particles are taken into account via dynamic local field corrections (DLFC) in a Mermin dielectric function for two-component plasmas. The mean ionization states are obtained by employing the detailed configuration accounting model. The Yukawa-type effective potential is used to derive the DLFC. Numerically, the DLFC are obtained via self-consistent iterative operations. We find that the DLFC are significant around the maximum of the stopping power. Furthermore, by using the two-component extended Mermin dielectric function model including the DLFC, the energy loss of a proton with an initial energy of similar to 15 MeV passing through a WDP of beryllium with an electronic density around the solid value ne approximate to 3 x 10(23) cm(-3) and with temperature around similar to 40 eV is estimated numerically. The numerical result is reasonably consistent with the experimental observations [A. B. Zylsta et al., Phys. Rev. Lett. 111, 215002 (2013)]. Our results show that the partial ionization and the dynamic properties should be of importance for the stopping of charged particles moving in the WDP.

• 出版日期2016-12-9
• 单位中国工程物理研究院; 北京应用物理与计算数学研究所; 北京大学