Positronium collisions with rare-gas atoms: Free-electron gas plus orthogonalizing pseudopotential model
Positronium collisions with rare-gas atoms: Free-electron gas plus orthogonalizing pseudopotential model
复制标题
正电子与稀有气体原子的碰撞:自由电子气体加上正交赝势模型
DOI:
10.1103/physreva.98.042703
复制
发表时间:
2018
影响因子:
2.9
通讯作者:
Fabrikant, I. I.
中科院分区:
文献类型:
--
作者:
Wilde, R. S.;Fabrikant, I. I.
Positronium collisions with rare-gas atoms are treated using the free-electron-gas approximation for exchange and correlation potential. The results confirm the absence of the Ramsauer-Townsend minimum in elastic scattering cross sections, but show lower cross sections in the lower-energy region when compared to previous pseudopotential calculations. This is explained by a more attractiveab initiocorrelation potential as compared to the previously used empirical potential. The results in the thermal-energy region agree very well with most swarm measurements for all rare-gas atoms. At higher energies, the results are compared with beam experiments and agreement for heavier rare-gas atoms Ar, Kr, and Xe is found to be very good. For He and Ne, some discrepancies with beam measurements are observed. This is explained by a poorer performance of the free-electron-gas potentials, based on the statistical Thomas-Fermi model, for systems with fewer electrons.
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DOI:
10.1088/0953-4075/35/12/303
发表时间:
2002
期刊:
Journal of Physics B
影响因子:
--
作者:
Jennifer E. Blackwood;M. Mcalinden;H. Walters
通讯作者:
H. Walters
影响因子:
8.6
作者:
Brawley SJ
通讯作者:
Brawley SJ
影响因子:
2.9
作者:
I. Fabrikant;R. Wilde
通讯作者:
R. Wilde
影响因子:
2.9
作者:
M. Skalsey;J. Engbrecht;C. Nakamura;R. Vallery;D. Gidley
通讯作者:
D. Gidley
影响因子:
2.9
作者:
J. Mitroy;I. Ivanov
通讯作者:
I. Ivanov