Resonances in Low-Energy Electron Collisions with Salicylic Acid.

IF 2.8 2区 化学 Q3 CHEMISTRY, PHYSICAL
The Journal of Physical Chemistry A Pub Date : 2025-02-06 Epub Date: 2025-01-28 DOI:10.1021/acs.jpca.4c07822
Valéria Liberti, Pedro A S Randi, Márcio H F Bettega, Alessandra Souza Barbosa
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引用次数: 0

Abstract

In this work, we report elastic integral, differential, and momentum-transfer cross sections for the scattering of low-energy electrons by salicylic acid. The cross sections were calculated with the Schwinger multichannel method implemented with norm-conserving pseudopotential within the static-exchange and static-exchange plus polarization (SEP) approximations for energies up to 15 eV. In the SEP approximation, four π* resonances were found at around 0.023, 1.27, 3.60, and 6.80 eV. While the first three are shape resonances, the latter has a mixed shape and core-excited shape character. We compare our results with available measurements in the literature, and we also discuss the role of the second resonance in the production of [M-H]- and [M-H2]- species through dissociative electron attachment.

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与水杨酸低能电子碰撞的共振。
在这项工作中,我们报告了水杨酸散射低能电子的弹性积分、微分和动量传递截面。在能量高达15 eV的静态交换和静态交换加极化(SEP)近似下,利用范数守恒赝势实现的Schwinger多通道方法计算了截面。在SEP近似下,在0.023、1.27、3.60和6.80 eV附近发现了4个π*共振。前三种共振为形状共振,而后一种共振具有混合形状和核激发形状特征。我们将我们的结果与文献中可用的测量结果进行了比较,并讨论了通过解离电子附着产生[M-H]-和[M-H2]-的第二次共振的作用。
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来源期刊
The Journal of Physical Chemistry A
The Journal of Physical Chemistry A 化学-物理:原子、分子和化学物理
CiteScore
5.20
自引率
10.30%
发文量
922
审稿时长
1.3 months
期刊介绍: The Journal of Physical Chemistry A is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.
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