Elastic and vibrational excitation cross sections for electron collisions with propane
Elastic and vibrational excitation cross sections for electron collisions with propane
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电子与丙烷碰撞的弹性和振动激发截面
DOI：
10.1088/0953-4075/27/9/020
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
H. Sato
中科院分区：
文献类型：
--
作者：
L. Boesten;M. Dillon;Hiroshi Tanaka;M. Kimura;H. Sato
绝对，弹性微分截面（DCS）的电子-丙烷碰撞已被测量范围内的散射角从10度到130度和入射动能从2到100 eV。通过非线性相移拟合将角分布外推到0度和180度，并进行数值积分，以获得积分弹性和动量传递截面。所观察到的DCS同意约与连续多次散射计算，仅使用本地的潜力，也与多通道Schwinger变分计算。的振动非弹性DCS揭示的形状共振峰在7.5 eV的特征是捕获的价轨道与C-H反键字符，是相同的电子-甲烷和电子-乙烷散射中遇到的峰。
Absolute, elastic differential cross sections (DCS) for electron-propane collisions have been measured over a range of scattering angles from 10 degrees to 130 degrees and at incident kinetic energies from 2 to 100 eV. The angular distributions were extrapolated to 0 degrees and 180 degrees by a nonlinear phase shift fit and integrated numerically to obtain the integral elastic and momentum transfer cross sections. The observed DCS agree approximately with a continuum multiple scattering calculation that uses only local potentials and also with a multichannel Schwinger variational calculation. The vibrationally inelastic DCS reveal a shape resonance with a peak at 7.5 eV that is characteristic of trapping by valence orbitals with C-H antibonding character and is identical with peaks encountered in electron-methane and electron-ethane scattering.