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Correlated charge changing ion-atom collisions: Progress report for the period August 15, 1984-February 14, 1987

Technical Report ·
OSTI ID:7019921
;
Correlations between x-ray emission and charge-changing interactions have been measured for high charged ions (16 less than or equal to Z less than or equal to 23) in the energy range of 0.1 to 10 MeV/u incident on gas targets under single collision conditions. These experiments combined with theoretical studies have established the existence of resonant transfer and excitation (RTE) and indicated a close relationship between RTE and dielectronic recombination. Detailed investigations of RTE include: (1) the projectile Z dependence; (2) the projectile charge-state dependence; (3) the effect of the target electron momentum distribution; and (4) observations of RTE involving L-shell excitation. These measurements are in reasonable agreement with theoretical calculations. Evidence for non-resonant transfer and excitation has been obtained from studies of 15 to 200 MeV S/sup 13 +/ + He collisions. Single-electron capture and loss were measured for 2.5 to 200 MeV S/sup 13 +/ + He thereby providing a comparison with theory over a very wide energy range. For single capture in Ca/sup 16,17,18,19/sup +/ + H/sub 2/ a significant contribution due to RTE was observed for energies where RTE is important. Cross sections for double-electron capture for S/sup 13 +/ + He and Ne and Ar/sup 15 +/ + Ne were found to be 1 to 2 orders of magnitude smaller than the corresponding single-capture cross sections. Target ionization associated with projectile charge exchange has been measured for 0.5 to 1.5 MeV/u O/sup 5,6,7,8/sup +/ + He and H/sub 2/. 26 refs., 13 figs.
Research Organization:
Western Michigan Univ., Kalamazoo (USA). Dept. of Physics
DOE Contract Number:
AC02-83ER13116
OSTI ID:
7019921
Report Number(s):
DOE/ER/13116-9; ON: DE87005660
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOM COLLISIONS
CALCIUM IONS
CAPTURE
CHARGED PARTICLES
COLLISIONS
DATA
ELECTRON CAPTURE
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
INFORMATION
ION COLLISIONS
ION SPECTROSCOPY
ION-ATOM COLLISIONS
IONS
MULTICHARGED IONS
NEON
NONMETALS
NUMERICAL DATA
RARE GASES
RECOMBINATION
RESEARCH PROGRAMS
SPECTROSCOPY
SULFUR IONS
THEORETICAL DATA