Abstract:
We present detailed calculations for one- and two-photon above-threshold detachment (ATD) cross-sections of the negative positronium ion Ps - ( e + e - e - ), below the threshold of Ps(n = 2), using a configuration interaction (CI) method on a B splines basis. Both the one- and two-photon detachment cross-sections have a form similar to the corresponding spectra of the H- ion, scaled accordingly. The peak value of the one-photon cross-section agrees very well with the calculations by Bathia and Drachman [1], while it differs from those by Igarashi et al. [2], which give a value of 15% lower. Two-photon detachment cross-sections are also reported.
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Received 24 January 2002 / Received in final form 9 April 2002 Published online 19 July 2002
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Maniadaki, K., Nikolopoulos, L. & Lambropoulos, P. One and two-photon detachment cross-sections of Ps- . Eur. Phys. J. D 20, 205–209 (2002). https://doi.org/10.1140/epjd/e2002-00123-2
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DOI: https://doi.org/10.1140/epjd/e2002-00123-2