Measurement of Electron-Drift Velocity in Ar+CH ₄ Mixtures Using Double-Grid Method

Abstract

Based on analyzing the induced signals from the double-grids of an ionization chamber, the electron-drift time between the two grids is determined and the electron-drift velocity is derived. A waveform digitizer is employed to record pulses from the two grids of the ionization chamber. The electron-drift velocity is measured as a function of the reduced electric field 𝐸/𝑝 for eight different ratios of Ar+CH4 mixtures. By analyzing the experimental data of this study, self-consistency of experimental data is achieved, and formulae for calculating electron-drift velocity in any ratio of Ar+CH4 mixtures are obtained.

Progress of experimental researches on neutron induced light charged-particle emission nuclear reactions

“…反应堆中子源, 典型的是法国Grenoble的ILL, 它 是世界上最强的反应堆中子源, 可以提供热中子束与 冷中子束. 依托该中子源, 开展了热中子诱发的 35 Cl(n,p) (1994), 50 V(n,p) (1994), 17 O(n,α) (1995), 36 Cl (n,p)和(n,α) (1996), 41 Ca(n,p)和(n,α) (1998), 37 Ar(n,p)和 (n,α) (1999,2001), 14 N(n,p) (2000), 26 Al(n,p i ) (n,α i ) (2001)等一系列带电粒子出射核反应截面测量 [2][3][4] . 采 用极化的冷中子束, 分别在2011和2017年, 得到了 6 Li (n,t) 4 He反应中的t粒子和 10 B(n,α) 7 Li*→ 7 Li+γ反应中的 γ射线及α粒子的所谓P-odd asymmetry实验结果 [5,6] .…”