Relativistic calculation of atomic N-shell ionization by protons

Technical Report · Tue Jul 01 00:00:00 EDT 1986

OSTI ID:6925448

Chen, M H; Crasemann, B

Relativistic plane-wave Born-approximation calculations of cross sections for N-shell ionization of Bi and U by protons with incident energies from 0.02 to 5 MeV are reported. The calculations were carried out by using Dirac-Hartree-Slater wave functions. Binding-energy change and Coulomb deflection were taken into account. The relativistic cross sections are compared with values from nonrelativistic Hartree-Slater wave functions to study the effects of relativity. A test calculation with hydrogenic wave functions yields very different results. The only available measurements (for W 74), revised with a corrected 4 d fluorescence yield, agree with present theoretical predictions for E/sub 0/ < or = 0.1 MeV, but fall below theory by a factor of 6 above E/sub 0/ = 0.4 MeV. This glaring discrepancy invites further investigation.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• OSTI ID: 6925448
• Report Number(s): AD-A-174846/6/XAB
• Resource Relation: Other Information: Published in Physical Review A, Vol. 34, No. 1, 87-92(Jul 1986)
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BISMUTH
N SHELL
PROTON REACTIONS
IONIZATION
URANIUM
BORN APPROXIMATION
CROSS SECTIONS
KEV RANGE 10-100
KEV RANGE 100-1000
MEV RANGE 01-10
WAVE FUNCTIONS
ACTINIDES
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY RANGE
FUNCTIONS
HADRON REACTIONS
KEV RANGE
METALS
MEV RANGE
NUCLEAR REACTIONS
NUCLEON REACTIONS
640304* - Atomic
Molecular &amp; Chemical Physics- Collision Phenomena