Theoretical calculation of positron annihilation spectrum using positron‐electron correlation‐polarization potential
Theoretical calculation of positron annihilation spectrum using positron‐electron correlation‐polarization potential
复制标题
利用正电子电子相关极化势理论计算正电子湮没谱
DOI:
10.1002/qua.26376
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
M. Tachikawa
中科院分区:
文献类型:
--
作者:
Y. Sugiura;T. Takayanagi;M. Tachikawa
The positron‐electron correlation‐polarization potential model is used to calculate annihilation spectra of carbon disulfide and benzene. We assume that the positron is captured in the vibrationally excited states of the target molecule through vibrational Feshbach resonances. Using the standard normal mode representation, we calculated the resonance energies and widths for each vibrational mode. The resonance widths were calculated with Fermi's Golden Rule approximation, where the time‐dependent wave packet approach has been applied. We found that vibrational resonances of infrared‐active modes play a dominant role in resonant annihilation; however, infrared‐inactive modes also contribute to the annihilation spectrum through polarizability changes along normal mode coordinates.
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期刊:
Journal of Physics: Conference Series
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