Eur. Phys. J. D 39, 223-225 (2006)
https://doi.org/10.1140/epjd/e2006-00100-9

Double photoionization of helium atoms at 1 eV above threshold

¹ Department of Applied Mathematics, University College of Science, 92 A.P.C. Road, Kolkata, 700 009, India
² Department of Mathematics, Scottish Church College, 1 & 3 Urquhart Square, Kolkata, 700 006, India

Corresponding author: ^a kkch@eth.net

Received: 8 January 2006
Revised: 15 March 2006
Published online: 5 May 2006

Abstract

An ab initio calculation of triple differential cross-section for double photoionization of helium atoms are presented for a very low energy of just 1 eV above threshold in the equal energy sharing kinematics. We have used hyperspherical partial wave theory together with a Numerov difference scheme in place of other schemes used in our earlier works. The results are in excellent qualitative agreement with the measurements of Dörner et al. [Phys. Rev. A 57, 1074 (1998)].