Correlated charge changing ion-atom collisions. Progress report, March 15, 1985-March 14, 1986

Technical Report · Tue Apr 01 04:00:00 EST 1986

OSTI ID:5800727

Bernstein, E M; Tanis, J A

X-ray emission associated with projectile charge-changing events in ion-atom collisions has been used to isolate and investigate excitation, ionization, and charge transfer, as well as combinations of these processes. New measurements were made of K-shell and L-shell resonant transfer and excitation (RTE) for 210 to 300 MeV /sub 20/Ca/sup 10,11+/ + H/sub 2/ collisions and 230 to 610 MeV /sub 41/Nb/sup 31 +/ + H/sub 2/ collisions, respectively. Nonresonant transfer and excitation (NTE) was studied for 40 to 160 MeV S/sup 13 +/ + Ne. Single-electron capture and loss measurements, requiring accel-decel techniques, were made for 2.5 to 200 MeV S/sup 13 +/ on He. In the case of Ca/sup 16,17,18,19/sup +// + H/sub 2/ collisions the single capture cross cross sections exhibit a nonmonotonic energy dependence which we attribute to RTE. Double-electron capture in single collisions was investigated for S/sup 13 +/ + He and Ne and Ar/sup 15 +/ + Ne and the cross sections were found to be 10 to 100 times smaller than the single-capture cross sections. Measured two-electron loss cross sections for Ca/sup q/sup +// ions incident on H/sub 2/ vary with charge state and depend strongly on whether L- or K-shell electrons are removed. Measurements of simultaneous projectile excitation and electron loss for several collision systems indicate that K-vacancy production occurs primarily through excitation rather than loss of the 1s electron. 13 refs.

• Research Organization: Western Michigan Univ., Kalamazoo (USA)
• DOE Contract Number: AC02-83ER13116
• OSTI ID: 5800727
• Report Number(s): DOE/ER/13116-8; ON: DE86010390
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOM COLLISIONS
CALCIUM IONS
CAPTURE
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HYDROGEN
INFORMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZING RADIATIONS
IONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
MULTICHARGED IONS
NEON
NIOBIUM IONS
NONMETALS
NUMERICAL DATA
RADIATIONS
RARE GASES
SULFUR IONS
X RADIATION