Threshold behavior of Cu-, Ge-, Ag-K-, and Au-L/sub 3/-shell ionization cross sections by electron impact

Journal Article · Wed Jul 01 04:00:00 EDT 1981 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.24.72· OSTI ID:6194076

Shima, K; Nakagawa, T; Umetani, K; Mikumo, T

Electron-induced Cu-, Ge-, Ag-K shells, and Au-L/sub 3/-shell ionization cross sections have been obtained from the measurement of K..cap alpha.. and L..cap alpha.. x-ray emission cross sections around the threshold energy. K- and L/sub 3/-shell ionization cross sections have been observed to rise as a function of ln(U/sub i/)/U/sub i/, where U/sub i/ is the ratio of electron impact energy to ionization energy. In the increasing behavior of Au-L..cap alpha.. and -L..beta.. x-ray emission cross sections with increasing impact energies, the onset of L/sub 2/- and L/sub 1/-shell ionizations have been observed at L/sub 2/- and L/sub 1/-shell ionization energies. Absolute values of Cu-, Ge-, Ag-K-shell ionization cross sections are well reproduced by the empirical formula of Green and Cosslett down to the vicinity of threshold energy.

• Research Organization: Tandem Accelerator Center, University of Tsukuba, Ibaraki 305, Japan
• OSTI ID: 6194076
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 24:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
COPPER
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRONIC STRUCTURE
ELEMENTS
EMISSION SPECTRA
EXPERIMENTAL DATA
GERMANIUM
GOLD
INFORMATION
IONIZATION
K SHELL
L SHELL
METALS
NUMERICAL DATA
SILVER
SPECTRA
TRANSITION ELEMENTS
X-RAY SPECTRA