Atomic charge exchange between fast helium ions and targets from carbon to bismuth at [beta]=0. 36

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.3992· OSTI ID:6904169

Dennis, K; Akimune, H; Berg, G P.A.; Chang, S; Davis, B; Fujiwara, M; Harakeh, M N; Jaenecke, J; Liu, J; Pham, K; Roberts, D A; Stephenson, E J ^[1]

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1. The University of Michigan, Ann Arbor, Michigan 48109 (United States) Department of Physics, Kyoto University, Kyoto 606 (Japan) Indiana University Cyclotron Facility, Bloomington, Indiana 47408 (United States) University of Notre Dame, Notre Dame, Indiana 47408 (United States) Research Center for Nuclear Physics, Osaka University, Osaka 567 (Japan) Kernfysisch Versneller Instituut, 9747AA Groningen (Netherlands)

Equilibrium charge-state distributions for singly and doubly ionized [sup 3]He ions of energy [ital E]([sup 3]He)=200 MeV ([beta]=0.36) have been measured for atomic targets ranging from carbon to bismuth ([ital Z]=6,14,28,40,50,67,73,83). A magnetic spectrometer was used to simultaneously measure the rate of [sup 3]He[sup +] ions and the current of the incident beam of [sup 3]He[sup 2+] ions. The ratio of the fraction of ions [ital Y]([sup 3]He)[sup +]/[ital Y]([sup 3]He[sup 2+]) was found to increase from 3[times]10[sup [minus]9] for [ital Z]=6 to 2[times]10[sup [minus]7] for [ital Z]=83. Very good agreement with the experimental ratios was obtained for calculated ratios based on theoretical stripping (ionization) and capture cross sections. The cross sections are dominated by capture from [ital K] orbits only for atoms up to about [ital Z]=25. For target atoms with high [ital Z], contributions up to principal quantum numbers [ital n]=4 ([ital N] orbits) must be included.

• OSTI ID: 6904169
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:5; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOMIC NUMBER
BISMUTH
CAPTURE
CARBON
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON CAPTURE
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
EVEN-ODD NUCLEI
HELIUM 3
HELIUM IONS
HELIUM ISOTOPES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
ISOTOPES
K SHELL
LIGHT NUCLEI
METALS
NONMETALS
NUCLEI
RELATIVISTIC RANGE
SENSITIVITY
STABLE ISOTOPES
TARGETS