Oscillator strengths and cross sections of the valence shell excitations in nitrous oxide studied by high-energy electron scattering

被引：3

作者：

Chen, Jin-Feng ^{[1
,2
]}

Wang, Shu-Xing ^{[1
,2
]}

Li, Heng-Hui ^{[1
,2
]}

Zhu, Jian-Hui ^{[1
,2
]}

Nie, Zhi-Wei ^{[1
,2
]}

Li, Tian-Jun ^{[1
,2
]}

Ma, Zi-Ru ^{[1
,2
]}

Wang, Li-Han ^{[1
,2
]}

Zhu, Lin-Fan ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Res Ctr Phys Sci, Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

来源：

CHEMICAL PHYSICS | 2023年 / 568卷

基金：

中国国家自然科学基金;

关键词：

Nitrous oxide; Inelastic electron scattering; Oscillator strength; Cross section; First Born approximation; BE-scaling method; VACUUM-ULTRAVIOLET; N2O; ABSORPTION; MOLECULES; HELIUM; IMPACT; RADIATION; SPECTRUM; REGION;

D O I：

10.1016/j.chemphys.2023.111826

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Generalized oscillator strengths (GOSs) of the valence shell excitations to the A(1)Sigma(-) + B-1 Delta, C-1 Pi, D-1 Sigma(+) and 2(1) Pi states in nitrous oxide have been determined by employing an angle-resolved electron energy loss spectrometer operated at an incident energy of 1500 eV and an energy resolution of about 80 meV. Detailed comparisons with the previous data indicate that the higher-order Born terms play a significant role in the GOSs of C-1 Pi and D-1 Sigma(+) states at either low impact energies or large momentum transfers, and the GOSs of A(1)Sigma(-) + B-1 Delta and C-1 Pi states measured with the gas cell may suffer from the pressure effect. The measured GOS data are fitted with the Lassettre formula to determine the corresponding optical oscillator strengths (OOSs) and calculate the integral cross sections (ICSs) based on the BE-scaling method. The oscillator strengths and cross sections in this work provide a cross check on the previous data and can serve as a benchmark for testing the developed theoretical models and computational codes.

引用

页数：7

共 49 条

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[2]

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