[ital L]-shell ionization studies of Pb and Bi with [alpha] particles

Journal Article · Sat Jan 01 00:00:00 EST 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.49.329· OSTI ID:5405954

Dhal, B B; Nandi, T; Padhi, H C ^[1]

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1. Institute of Physics, Bhubaneswar 751005 (India)

Ionization cross sections for the [ital L] subshells of Pb and Bi by [alpha]-particle bombardment (2.2--8.2 MeV) have been determined from the experimental data and the currently available radiative transition probabilities, fluorescence yields, and Coster-Kronig factors. The measured ionization cross sections and their ratios are compared with the results of ECPSSR calculations [ECPSSR denotes perturbed-stationary-state (PSS) theory with energy-loss (E), Coulomb deflection (C), and relativistic (R) corrections]. The measured individual cross sections for [ital L][sub 1] and [ital L][sub 2] subshells deviated in opposite directions from the theory, whereas their sum shows good agreement. The [ital L][sub 3] and total ionization cross sections obtained from the data also show good agreement with the ECPSSR theory. The ionization cross-section ratios [sigma][sub [ital L]1]/[sigma][sub [ital L]2] and [sigma][sub [ital L]3]/[sigma][sub [ital L]2] show large deviations from the ECPSSR theory. The experimental x-ray production cross-section ratios are found to be in better agreement with the theoretical results obtained from using ECPSSR ionization cross sections and the decay yield data of Xu and Xu [J. Phys. B 25, 695 (1992)] rather than those obtained from using the decay yield data of Krause [J. Phys. Chem. Ref. Data 8, 307 (1979)]. The x-ray production cross sections, however, are in better agreement with the theoretical results obtained from using the decay yield data of Krause. The measured centroid energy of the [ital L][gamma] lines of Pb shows large deviations at high projectile energy, whereas for Bi large deviations are found at the low-energy region.

• OSTI ID: 5405954
• Journal Information: Physical Review A; (United States), Vol. 49:1; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALPHA PARTICLES
ION-ATOM COLLISIONS
BISMUTH
INNER-SHELL IONIZATION
CROSS SECTIONS
LEAD
COSTER-KRONIG TRANSITIONS
EXPERIMENTAL DATA
FLUORESCENCE
L SHELL
MEV RANGE 01-10
PROJECTILES
YIELDS
ATOM COLLISIONS
AUGER EFFECT
CHARGED PARTICLES
COLLISIONS
DATA
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
INFORMATION
ION COLLISIONS
IONIZATION
LUMINESCENCE
METALS
MEV RANGE
NUMERICAL DATA
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)