Single vs. double electron emission following the beta decay of He-6
Abstract
When a helium atom containing a 6He halo nucleus undergoes beta decay, the two atomic electrons become redistributed over all possible states of the daughter 6Li nucleus, including single- and double-electron emission (shake-off). The present study focuses on the probability for double electron emission to form Li3+, where there is a substantial disagreement between theory and experiment. We use pseudospectral representations together with Stieltjes imaging to separate the Li3+ + 2e- channel from the energetically overlapping Li2+ +e- single ionization channel. We find that the formation of Li3+ is strongly suppressed near threshold relative to Li2+, thereby accounting for part of the disagreement with experiment. However, there still remains a substantial disagreement in the total probability.
*NSERC and SHARCnet are gratefully acknowledged.- Publication:
-
APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DMPH02004B