Projectile and target L x-ray spectra produced in fast Kr ion collisions

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:199637

Blackadar, J M; Horvat, V; Watson, R L ^[1]

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1. Texas A&M Univ., College Station, TX (United States); and others

Spectra of L x rays emitted by 6 and 12 MeV/amu Kr ions traveling in a variety of solid targets have been measured with a curved crystal spectrometer. Preliminary analysis indicates that for a given energy the relative subshell population distributions and fluorescence yields are about the same for the M, N, and O shells. The spectra also reflect differences in the charge state distribution and in the electron capture cross sections at the two projectile energies. Target L x-ray spectra produced by the interaction of 6 MeV/amu Kr ions with thick, solid targets of Rb, Mo, and La were also measured. These spectra are all characterized by several sharp lines adjacent or superimposed upon one or more very broad peaks. The sharp lines were found to be due to the L{alpha}, L{beta}{sub 1}, and L{beta}{sub 2,15} transitions in target atoms having single L vacancies. They are evidently excited as a result of photoionization by high fluxes of photons produced inside the targets with energies just above the L absorption edges. The broad peaks, on the other hand are apparently due to the L x rays from target atoms having several L vacancies and are produced by ion-atom collisions.

• OSTI ID: 199637
• Report Number(s): CONF-941129--
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
HEAVY ION REACTIONS
KRYPTON IONS
L SHELL
LANTHANUM
MOLYBDENUM
RUBIDIUM
SOLIDS
X-RAY SPECTRA