Threshold krypton charge-state distributions coincident with K-shell fluorescence

Journal Article · Tue Apr 01 00:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.042718· OSTI ID:20633991

Armen, G B; Levin, J C ^[1]; Kanter, E P; Kraessig, B; Southworth, S H; Young, L ^[2]

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1. Department of Physics, University of Tennessee, Knoxville, Tennessee 37996 (United States)
2. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Measurements of Kr{sup q+} yields in coincidence with K-shell fluorescence, as incident x-ray energy is varied across the K-shell threshold, are reported. Near threshold, we observe slight variations in the branching ratios as a function of energy, which are connected with the different behaviors of the flux-normalized partial yields for each q. The lower-q yields show a resonance peak near threshold superimposed on a smoothly rising edge, whereas the higher-q yields show only a smooth rise. A simple model is developed which accounts for these features, incorporating both the threshold photoexcitation and the cascade behavior of the spectator electrons.

• OSTI ID: 20633991
• Journal Information: Physical Review. A, Vol. 67, Issue 4; Other Information: DOI: 10.1103/PhysRevA.67.042718; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BRANCHING RATIO
CATIONS
CHARGE STATES
ELECTRONS
ENERGY DEPENDENCE
FLUORESCENCE
K SHELL
KRYPTON
PHOTOIONIZATION
VARIATIONS
X RADIATION