Single and double scattering mechanisms in ionization of helium by electron vortex projectiles
Single and double scattering mechanisms in ionization of helium by electron vortex projectiles
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电子涡流射弹电离氦的单散射和双散射机制
DOI:
10.1088/1361-6455/ac1c38
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Harris, A L
中科院分区:
文献类型:
--
作者:
Harris, A L
Triple differential cross sections (TDCSs) for electron vortex projectile ionization of helium into the azimuthal plane are calculated using the distorted wave Born approximation. In this collision geometry, the TDCSs at low and intermediate energies exhibit unique qualitative features that can be used to identify single and double scattering mechanisms. In general, our results predict that the ionization dynamics for vortex projectiles are similar to those of their non-vortex counterparts. However, some key differences are observed. For non-vortex projectiles, a double scattering mechanism is required to emit electrons into the azimuthal plane, and this mechanism becomes more important with increasing energy. Our results demonstrate that for vortex projectiles, emission into the azimuthal plane does not require a double scattering mechanism, although this process still significantly influences the shape of the TDCS at higher energies. At low projectile energies, non-vortex ionization proceeds primarily through single binary collisions. The same is generally true for vortex projectiles, although our results indicate that double scattering is also important, even at low energy. Vortex projectiles have an inherent uncertainty in their incident momentum, which causes a broadening of the binary peak at all energies and results in a splitting of the binary peak at higher energies. The results presented here lead to several predictions that can be experimentally tested.
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DOI:
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发表时间:
2015
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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1993
期刊:
Physical Review A. Atomic, Molecular, and Optical Physics
影响因子:
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作者:
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2015
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1992
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1997
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作者:
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通讯作者:
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