Stopping power of protons and alpha particles in H/sub 2/, He, N/sub 2/, O/sub 2/, CH/sub 4/, and air
Stopping power of protons and alpha particles in H/sub 2/, He, N/sub 2/, O/sub 2/, CH/sub 4/, and air
复制标题
H/sub 2/、He、N/sub 2/、O/sub 2/、CH/sub 4/ 和空气中质子和 α 粒子的阻止本领
DOI：
10.1103/physreva.25.2499
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
L. Porter
中科院分区：
文献类型：
--
作者：
H. Bichsel;L. Porter
在H/ sub2 /、He、N/ sub2 /、O/ sub2 /和CH/ sub4 /等气体中带电粒子能量损失理论的最新发展，允许只用一个自由参数来计算停止功率，即在描述抛射电荷的立方修正项时所需要的。这些气体对质子和α粒子的阻挡力的实验数据与计算值进行了比较。一旦假设了自由参数的值，似乎就不需要进一步改进理论来解释弹丸能量高于0.5 MeV/u的数据。对于这些能量，理论的误差大概在+- 2%左右。
Recent developments in the theory of the energy loss of charged particles in the gases H/sub 2/, He, N/sub 2/, O/sub 2/, and CH/sub 4/, permit a calculation of the stopping power with only one free parameter, : that needed in the description of the cubic correction term for the projectile charge. Experimental data for the stopping power of these gases for protons and alpha particles have been compared with calculated values. Once a value of the free parameter is assumed, it appears that no further improvements in the theory are required to explain the data for projectile energies above 0.5 MeV/u. The error of the theory is probably about +- 2% for these energies.