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首页> 外文期刊>The Journal of Chemical Physics >Absolute cross section measurements for the scattering of low- and intermediate-energy electrons from PF3. II. Inelastic scattering of vibrational and electronic excitations
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Absolute cross section measurements for the scattering of low- and intermediate-energy electrons from PF3. II. Inelastic scattering of vibrational and electronic excitations

机译：从PF3散射低和中间能电子的绝对横截面测量。 II。 振动和电子激发的无弹性散射

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摘要

As a sequel paper to our study of the elastic scattering for electron collisions with phosphorus trifluoride, PF3 molecules, we report absolute inelastic differential and integral cross sections (DCS and ICS) of vibrational excitations for the compound fundamental vibrational modes v(13) (v(1) + v(3)), v(24) (v(2) + v(4)), and their sum in the impact energy range of 2.0-10 eV and over a scattering angle range of 20 degrees-130 degrees. The measured angular distributions of scattered electron intensities for the present inelastic scattering are normalized to the elastic peak intensity corresponding to the DCSs of He. These vibrational excitation measurements demonstrate the presence of resonances around 2 eV and also around 6-10 eV. In addition, a generalized oscillator strength analysis is applied to derive oscillator strength f(0)-values and (unscaled Born) ICSs from the corresponding DCSs measured for the low-lying optically allowed 8a(1)(-1) - 7e (sigma*) excitation band, which is assigned as the Jahn-Teller splitting and 8a(1)(-1) - 4s Rydberg transition at impact energies of 100, 200, and 300 eV, over a scattering angle range of 1.0 degrees-15 degrees. The f(0)-values obtained in the present study are compared with the results of previous photoabsorption and pseudo-optical measurements. The unscaled Born ICSs are compared with the binary-encounter f-scaled Born ICSs estimated over a wide impact energy region from the excitation thresholds. Published by AIP Publishing.
机译：作为我们对与三氟化磷的电子碰撞的弹性散射研究的续集纸，PF3分子，我们报告了化合物基本振动模式V（13）的振动激发的绝对非弹性差分和整体横截面（DCS和IC）（V. （1）+ v（3）），V（24）（V（2）+ V（4）），其碰撞能量范围为2.0-10 EV，散射角范围为20度-130程度。对于本间隙散射的散射电子强度的测量角分布被归一化为对应于他的DCS的弹性峰强度。这些振动激发测量显示出围绕2eV的共振的存在，并且还在6-10 ev约为6-10 ev。另外，施加广泛的振荡器强度分析以从测量的低位光学允许的8a（ - 1） - ＆gt测量的相应DCS从测量的相应DCS获得振荡器强度F（0）和（未乘积的出生）ICS。 7e（Sigma *）激励带，其被分配为Jahn-externer分裂和8a（1）（ - 1） - ＆ 4S rydberg在100,200和300eV的冲击能量下过渡，在1.0度-15度的散射角度范围内。将本研究中获得的F（0）值与先前的光吸收和伪光学测量的结果进行比较。将未扫描的出生的ICSS与从激励阈值的宽冲击能源区域估计的二进制遇到F扩展的ICS进行比较。通过AIP发布发布。

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