Laboratory simulation of direct positron annihilation in a neutral-hydrogen galactic environment

Details Laboratory simulation of direct positron annihilation in a neutral-hydrogen galactic environment Laboratory simulation of direct positron annihilation in a neutral-hydrogen galactic environment

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..57.1651b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 57, Sept. 29, 1986, p. 1651-1654.

Physics

24

Galactic Nuclei, Hydrogen Clouds, Molecular Gases, Neutral Gases, Positron Annihilation, Molecular Collisions

Scientific paper

The linewidth for thermalized positrons directly annihilating with bound electrons in low-density molecular hydrogen gas has been found to be 1.56±0.09 keV, by use of a Ge detector with a low-energy pulsed positron beam. This linewidth measurement together with previous experimental results makes it possible to determine precisely the composite spectrum due to positrons annihilating in a neutral-hydrogen galactic medium.

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