Au, Pb, Bi, and U M-subshell ionization by protons

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.28.2770· OSTI ID:5267815

de Castro Faria, N V; Freire, Jr, F L; de Pinho, A G; da Silveira, E F

M-subshell ionization cross sections of Au, Pb, Bi, and U by proton bombardment were obtained over the projectile range 0.3--4.0 MeV. X rays were detected by Si(Li) spectroscopy. At least one characteristic radiative transition line for each M subshell was isolated and measured. Radiative and nonradiative branching ratios were taken from theoretical calculations of Bhalla and McGuire. Our total x-ray-production cross sections are compared with the measurements of other authors. Comparison of our scaled subshell ionization cross sections with calculations in the plane-wave Born approximation shows, in general, good agreement. Uncertainties in fluorescence yields and in super--Coster-Kronig coefficients can introduce great imprecision in some experimentally determined subshell ionization cross sections.

• Research Organization: Departamento de Fisica, Pontificia Universidade Catolica, Caixa Postal 38071, Rio de Janeiro, Rio de Janeiro 22452, Brazil
• OSTI ID: 5267815
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 28:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ACTINIDES
ALUMINIUM
ATOM COLLISIONS
AUGER EFFECT
BISMUTH
BORN APPROXIMATION
CATIONS
CHARGED PARTICLES
COLLISIONS
COSTER-KRONIG TRANSITIONS
CROSS SECTIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FILMS
GOLD
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
INNER-SHELL IONIZATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 100-1000
LEAD
M SHELL
METALS
MEV RANGE
MEV RANGE 01-10
SPECTRA
SUBSTRATES
THIN FILMS
TRANSITION ELEMENTS
URANIUM
X-RAY SPECTRA