Photodetachment study of the 1s3s4s{sup 4}S resonance in He{sup {minus}}

Journal Article · Wed Oct 01 00:00:00 EDT 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.56.2788· OSTI ID:632568

Klinkmueller, A E; Haeffler, G; Hanstorp, D; Kiyan, I Y; Berzinsh, U; Ingram, C W ^[1]; Pegg, D J ^[2]; Peterson, J R ^[3]

---

1. Department of Physics, Goeteborg University and Chalmers University of Technology, S-412 96 Goeteborg (Sweden)
2. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
3. Molecular Physics Department, SRI International, Menlo Park, California 94025 (United States)

A Feshbach resonance associated with the 1s3s4s{sup 4}S state of He{sup {minus}} has been observed in the He(1s2s{sup 3}S)thinsp+thinspe{sup {minus}}({epsilon}s) partial photodetachment cross section. The residual He(1s2s{sup 3}S) atoms were resonantly ionized and the resulting He{sup +} ions were detected in the presence of a small background. A collinear laser-ion beam apparatus was used to attain both high resolution and sensitivity. We measured a resonance energy E{sub r}=2.959thinsp255(7) eV and a width {Gamma}=0.19(3) meV, in agreement with a recent calculation. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 632568
• Journal Information: Physical Review A, Journal Name: Physical Review A Journal Issue: 4 Vol. 56; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANIONS
ELECTRON DETACHMENT
EV RANGE 01-10
HELIUM IONS
METASTABLE STATES
PHOTON-ION COLLISIONS
RESONANCE
S STATES