dorsal/arxiv
View SchemaSpin-dipole induced lifetime of the least-bound quintet sigma state of He(2S)+He(2S)
| Authors | Timothy J. Beams, Gillian Peach, Ian B. Whittingham |
|---|---|
| Categories | |
| ArXiv ID | physics/0604189 |
| URL | https://arxiv.org/abs/physics/0604189 |
| DOI | 10.1103/PhysRevA.74.014702 |
Abstract
The properties of the least-bound vibrational level (v=14) of the quintet sigma state formed during the ultracold collision of two spin-polarized metastable helium atoms are crucial to studies of photoassociation spectroscopy of metastable helium. We report a calculation of the autoionization lifetime of this state induced by spin-dipole coupling of the quintet sigma state to the singlet sigma state from which Penning and associative ionization processes are highly probable. We find a lifetime of about 150 microseconds, significantly larger than the recent experimental estimates of (4-5) microseconds.
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"abstract": "The properties of the least-bound vibrational level (v=14) of the quintet\nsigma state formed during the ultracold collision of two spin-polarized\nmetastable helium atoms are crucial to studies of photoassociation spectroscopy\nof metastable helium. We report a calculation of the autoionization lifetime of\nthis state induced by spin-dipole coupling of the quintet sigma state to the\nsinglet sigma state from which Penning and associative ionization processes are\nhighly probable. We find a lifetime of about 150 microseconds, significantly\nlarger than the recent experimental estimates of (4-5) microseconds.",
"arxiv_id": "physics/0604189",
"authors": [
"Timothy J. Beams",
"Gillian Peach",
"Ian B. Whittingham"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.74.014702",
"title": "Spin-dipole induced lifetime of the least-bound quintet sigma state of He(2S)+He(2S)",
"url": "https://arxiv.org/abs/physics/0604189"
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