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Helium (γ, 2e) triple differential cross sections at an excess energy of 60 eV

Lookup NU author(s): Carol Dawson, Dr Slobodan Cvejanovic, Dr Dominic Paul Seccombe, Dr Timothy Reddish, Dr Fritz Maulbetsch


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(γ, 2e) triple differential cross sections are presented for helium at 60 eV above the photodouble ionization threshold with energy-sharing ratios (R = E2/E1) for the two ejected electrons of R = 1, 5 and 11. The measurements were taken using a toroidal spectrometer and linearly polarized light from an undulator beamline (SU6) at the Super-ACO storage ring. Good agreement is found with TDCSs obtained by the CCC method and by the length gauge of 3C theory.

Publication metadata

Author(s): Dawson C, Cvejanovic S, Seccombe DP, Reddish TJ, Maulbetsch F, Huetz A, Mazeau J, Kheifets AS

Publication type: Letter

Publication status: Published

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Year: 2001

Volume: 34

Issue: 16

Pages: L525-L533

ISSN (print): 0953-4075

ISSN (electronic): 1361-6455


DOI: 10.1088/0953-4075/34/16/104