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Phys Rev Lett
; 85(3): 530-3, 2000 Jul 17.
Artículo
en Inglés
| MEDLINE
| ID: mdl-10991332
RESUMEN
Double photoionization of helium has been studied using a new instrument which allows one to detect the two emitted electrons over 4 pi steradians and measure their individual momenta. The experiments have been performed at 0.2 and 0.1 eV above threshold, and both double and triple differential cross sections have been extracted. In comparison with higher energy data, the results show that the strength of angular correlation between the two electrons increases towards threshold.