Spin-dipole-induced lifetime of the least-bound 5Σ+g state of He(23S1)+He(23S1)
Beams, Timothy J., Peach, Gillian, and Whittingham, Ian B. (2006) Spin-dipole-induced lifetime of the least-bound 5Σ+g state of He(23S1)+He(23S1). Physical Review A (Atomic, Molecular and Optical Physics), 74 (1). 014702-1.
![[img]](https://researchonline.jcu.edu.au/style/images/fileicons/application_pdf.png) |
PDF (Published Version)
- Published Version
Restricted to Repository staff only |
Abstract
The properties of the least-bound vibrational level (v=14) of the Σg+5 state formed during the ultracold collision of two spin-polarized metastable 2S13 helium atoms are crucial to studies of photoassociation spectroscopy of metastable helium. We report a calculation of the autoionization lifetime τg of this state induced by spin-dipole coupling of the Σg+5 state to the Σg+1 state from which Penning and associative ionization processes are highly probable. We find τg≈150μs , significantly larger than the recent experimental estimates of (0.5‑3)μs.
| Item ID: | 4655 |
|---|---|
| Item Type: | Article (Research - C1) |
| ISSN: | 1050-2947 |
| Keywords: | atomic scattering; ultracold atomic collisions; helium neutral atoms; autoionisation; vibrational states; metastable states; Penning ionisation; associative ionisation; atom-photon collisions; radiative lifetimes; bound states |
| Date Deposited: | 17 Jun 2009 22:58 |
| FoR Codes: | 02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020201 Atomic and Molecular Physics @ 100% |
| SEO Codes: | 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100% |
| Downloads: |
Total: 4 |
| More Statistics |
Actions (Repository Staff Only)
 |
Item Control Page |