Eur. Phys. J. D (2014) 68: 75
https://doi.org/10.1140/epjd/e2014-40791-5

Regular Article

Collimated positronium production from gases^*

¹ UCL Department of Physics and Astronomy, University College London, Gower St., London, WC1E 6BT, UK
² Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4001 Debrecen, P.O. Box 51, Hungary

^a e-mail: michael.shipman.09@ucl.ac.uk
^b e-mail: g.laricchia@ucl.ac.uk

Received: 12 December 2013
Received in final form: 4 February 2014
Published online: 3 April 2014

Abstract

New data for positronium beam production efficiency are presented. As a converter of positrons to forward-going positronium, O₂ has been found to be as good as CO₂ from ~250 to 400 eV. Preliminary data is also presented for the production efficiency from Ar at 2.8 eV.