Proton stopping power of aluminum ions
Proton stopping power of aluminum ions
复制标题
DOI：
10.1103/physreva.26.1318
复制
发表时间：
1982-09
影响因子：
2.9
通讯作者：
E. J. Mcguire;J. Peek;L. Pitchford
中科院分区：
文献类型：
--
作者：
E. J. Mcguire;J. Peek;L. Pitchford
利用平面波玻恩近似的广义振子强度公式，计算了质子能量在0.1 ~ 100 MeV范围内Al/supn/+（0 ≤ n ≤ 11）的单个次壳层电离和激发对质子阻止本领的贡献.中性铝的计算结果与实验符合得很好。由于电离的子壳峰阻止本领与标度的中性原子值非常一致。用光学振子强度计算了所有Al离子的Bethe平均激发能I。将100 MeV时的阻止本领与贝特公式等同，得到了另一个I值。虽然两个I值对于某些离子是一致的，但对于其他离子，它们的差异高达50%。然而，即使在这种情况下，在100 MeV时阻止本领的变化小于10%，两种计算I的方法之间也会产生一致性。
With the use of the generalized-oscillator-strength formulation of the plane-wave Born approximation, the contribution of individual subshell ionization and excitation to the proton stopping power is calculated for Al/sup n/+ (0< or =n< or =11) for proton energies between 0.1 and 100 MeV. The neutral-Al results are in excellent agreement with experiment. The subshell-peak stopping power due to ionization is in excellent agreement with scaled neutral-atom values. The optical oscillator strength was used to calculate the Bethe mean-excitation energy I for all the Al ions. Equating the explicitly calculated stopping power at 100 MeV to the Bethe formula led to an alternative I value. While the two I values agreed for some ions, for others they disagreed by as much as 50%. However, even in such cases, a change of less than 10% in the stopping power at 100 MeV would produce agreement between the two methods of calculating I.