Elastic scattering of intermediate energy electrons by HCN
Elastic scattering of intermediate energy electrons by HCN
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HCN 对中能电子的弹性散射
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
A. Chutjian
中科院分区：
文献类型：
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作者：
S. Srivastava;H. Tanaka;A. Chutjian
利用交叉电子束-分子束几何构型和相对气流技术，测量了电子碰撞能量为3，5，11.6，21.6和50 eV，散射角为20° ~ 130°时HCN与He的弹性微分截面之比σ（HCN，He）/σ（He，He）。通过将这些比值乘以先前报道的σ（He，He）的绝对值，获得了σ（HCN，HCN）的归一化绝对值。由于HCN的转动-振动结构在目前的测量中没有得到解决，这里的弹性一词包括来自弹性散射的贡献，以及来自纯转动和1-0，ν2振动激发的贡献。的弹性微分截面进行了比较与玻恩近似和经典微扰理论的预测。在0° ~ 20°和130° ~ 180°角区，用外推法求得了σ（HCN，HCN）值。这些值已被用于计算积分和动量传递交叉。
Utilizing a crossed electron beam–molecular beam geometry and a relative gas flow technique, ratios σ (HCN,ϑ)/σ (He,ϑ) of elastic differential cross sections of HCN to those of He have been measured at electron impact energies of 3,5,11.6, 21.6, and 50 eV and at scattering angles of 20° to 130°. Normalized absolute values of σ (HCN,ϑ) have been obtained by multiplying these ratios by the absolute values of σ (He,ϑ) reported previously. Since the rotational–vibrational structure in HCN was not resolved in the present measurements, the term elastic here includes contributions from elastic scattering, as well as from pure rotational and the 1–0, ν2 vibrational excitations. The elastic differential cross sections have been compared with the predictions of the Born approximation and classical perturbation theory. For angular regions lying between 0° and 20°, and 130° and 180°, σ (HCN,ϑ) values have been obtained by extrapolation. These values have been used to calculate the integral and momentum‐transfer cross...