Published January 1997
| Version v1
Journal article
Observation of low-lying resonance states of He- at the 2 1S and 2 3S He thresholds
Creators
- 1. Centro Atomico Bariloche, Comision Nacional de Energia Atomica (CNEA), 8400 San Carlos de Bariloche, Rio Negro (Argentina)
- 2. Instituto de Astronomia y Fisica del Espacio, Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Casilla de Correo 67, Succursale 28, 1428 Buenos Aires (Argentina)
- 3. Western Michigan University, Kalamazoo, Michigan 49008 (United States)
- 4. Institut fuer Kernphysik der J. W. Goethe-Universitaet, August-Euler Strasse 6, D-60486 Frankfurt am Main (Germany)
- 5. Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), H-4001 Debrecen, P. O. Box 51 (Hungary)
Description
We measured the cusp electron production associated with target ionization at the impact of a 400-keV pure23S He beam and a mixed beam containing all three long-lived He states, i.e., 11S, 21S, and 23S. Using the results of an earlier experiment [Kuzel et al., Phys. Rev. A 48, R1745 (1993)], we estimated the cross section for both metastable states of He. We found that the cusp for the 21S state is much larger and sharper than for the 23S state. The peaks are manifestations of excitation of low-lying virtual or weakly bound states of the He- ion at the 21S and 23S thresholds. copyright 1997 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. A
- Journal Volume
- 55
- Journal Issue
- 1
- Journal Page Range
- p. R14-R17.
- ISSN
- 1050-2947
- CODEN
- PLRAAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28032547
- Subject category
- S74: ATOMIC AND MOLECULAR PHYSICS;
- Descriptors DEI
- ATOM-ATOM COLLISIONS; CROSS SECTIONS; ELECTRON CAPTURE; ELECTRON SPECTRA; HELIUM; HELIUM IONS; HELIUM 4; HELIUM 4 BEAMS; IONIZATION; KEV RANGE 100-1000; METASTABLE STATES; RESONANCE; S STATES; THRESHOLD ENERGY
- Descriptors DEC
- ATOM COLLISIONS; BEAMS; CAPTURE; CHARGED PARTICLES; COLLISIONS; ELEMENTS; ENERGY; ENERGY LEVELS; ENERGY RANGE; EVEN-EVEN NUCLEI; EXCITED STATES; HELIUM ISOTOPES; ION BEAMS; IONS; ISOTOPES; KEV RANGE; LIGHT NUCLEI; NONMETALS; NUCLEI; RARE GASES; SPECTRA; STABLE ISOTOPES