Enhancement of direct positron annihilation due to temporal capture by an atom

Nobuhiro Yamanaka, Yasushi Kino, Yasushi Takano, Hiroshi Kudo, Atsushi Ichimura

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The direct positron annihilation during a collision in a gas was investigated. From the evolution of a wave packet with a time width much shorter than the Ps lifetime, the cross section of direct annihilation was calculated, where the direct contribution was extracted through the time dependence of survival probability. It was found that the cross section obtained for hydrogen atom was enhanced in energies around 10 eV well above the Ps formation threshold voltage.

Original languageEnglish
Article number052712
Pages (from-to)527121-527124
Number of pages4
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume67
Issue number5
Publication statusPublished - 2003 May

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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