The Range-Energy Curves for Alpha-Particles and Protons
The Range-Energy Curves for Alpha-Particles and Protons
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DOI：
10.1103/physrev.78.1
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发表时间：
1950-04
期刊：
影响因子：
--
通讯作者：
W. P. Jesse;J. Sadauskis
中科院分区：
文献类型：
--
作者：
W. P. Jesse;J. Sadauskis
以前的实验已经表明，在氩气中，α粒子的能量与它产生的总电离量之间存在很好的比例关系，但在空气中，这种比例关系并不存在，在低α能量时，电离量比能量下降得更快。在0-5 Mev范围内确定的射程-能量曲线，其中空气中的电离被用作α能量的量度，因此给出的能量值太低。这样的曲线，当在氩气中的等效电离值校正，显示出更好的协议与范围和来自核反应的能量数据。从α曲线导出的质子射程-能量曲线也表明，当用修正后的α射程-能量曲线代替旧的曲线时，与核数据的一致性有所提高。
Previous experiments have shown that in argon there exists a very good proportionality between the energy of an alpha-particle and the total ionization produced by it. In air this proportionality is not found, the ionization decreasing more rapidly than energy at low alpha-energies. Range-energy curves determined in the region 0-5 Mev, where the ionization in air is used as a measure of the alpha-energy, hence give too low energy values. Such curves, when corrected to equivalent ionization values in argon, show much better agreement with range and energy data derived from nuclear reactions. The range-energy curve for protons, derived from the alpha-curve, also shows improved agreement with nuclear data when the corrected alpha-range-energy curve is substituted for the old.