Transmission experiment for measuring total positron–atom collision cross sections in a curved, axial magnetic field
Transmission experiment for measuring total positron–atom collision cross sections in a curved, axial magnetic field
复制标题
用于测量弯曲轴向磁场中总正电子原子碰撞截面的透射实验
DOI：
10.1063/1.1135164
复制
发表时间：
1977
影响因子：
1.6
通讯作者：
V. Pol
中科院分区：
文献类型：
--
作者：
W. Kauppila;T. Stein;G. Jesion;M. Dababneh;V. Pol
我们描述并分析了一个传输实验，该实验用于测量低能正子（0.3-250 eV）与包含弯曲轴向磁场的区域中的气体碰撞的总散射截面。它是确定的螺旋不明显增加通过弯曲，轴向磁场中的气体散射区域的光束路径长度。通过测量能量范围从1.5到30 eV的电子与氦原子和氩原子碰撞的总截面，对实验装置和技术进行了全面测试，发现目前的测量值在最可靠的先前测量值的15%以内。
We describe and analyze a transmission experiment developed for measuring total scattering cross sections for low‐energy poistrons (0.3–250 eV) colliding with gases in a region containing a curved, axial magnetic field. It is determined that spiralling does not appreciably increase the beam path length through the curved, axial magnetic field in the gas scattering region. An overall test of the experimental apparatus and technique is made by measuring total cross sections for electrons colliding with helium and argon atoms in the energy range from 1.5 to 30 eV, where it is found that the present measurements are within 15% of the most reliable prior measurements.