L-subshell x-ray production cross sections of Ba, La and Ce for proton energies from 0. 25 to 2. 00 MeV

Journal Article · Fri Apr 01 04:00:00 EST 1983 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/TNS.1983.4332426· OSTI ID:5837702

Rayburn, L A

Protons from the University of Texas at Arlington's 2 MV Van de Graaff accelerator were used to produce characteristic L x-rays from thin targets of Ba, La and Ce. The incident proton energy was varied from 0.25 to 2.00 MeV. The x-rays were detected by a detector mounted at 90/sup 0/ to the incident beam direction. Measured x-ray production cross sections were converted to ionization cross sections by the use of subshell fluorescence yields and CosterKronig transition probabilities taken from Bambynek. Inflection points are found in the L/sub 1/-subshell ionization cross section for all three elements. Although the theoretical plane-wave Born approximation (PWBA) curves do have inflection points (whereas the binary encounter approximation (BEA) curves do not), the PWBA theory does not correctly predict the proton energies at which these occur for all three elements.

• Research Organization: Dept. of Physics, Univ. of Texas at Arlington, Arlington, TX 76019
• OSTI ID: 5837702
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Journal Name: IEEE Trans. Nucl. Sci.; (United States) Vol. 30:2; ISSN IETNA
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATORS
ALKALINE EARTH METALS
AUGER EFFECT
BARIUM
BARYONS
BEAM PRODUCTION
BEAMS
BORN APPROXIMATION
CERIUM
COLLISIONS
COSTER-KRONIG TRANSITIONS
CROSS SECTIONS
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELECTROSTATIC ACCELERATORS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
ENRICHED URANIUM REACTORS
FERMIONS
FLUORESCENCE
HADRONS
HOMOGENEOUS REACTORS
HYDRIDE MODERATED REACTORS
ION BEAMS
ION COLLISIONS
IONIZATION
IONIZING RADIATIONS
IRRADIATION REACTORS
ISOTOPE PRODUCTION REACTORS
L SHELL
LANTHANUM
LUMINESCENCE
METALS
MEV RANGE
MEV RANGE 01-10
NUCLEONS
PROBABILITY
PROTONS
PULSED REACTORS
RADIATION DETECTION
RADIATIONS
RARE EARTHS
REACTORS
RESEARCH AND TEST REACTORS
SOLID HOMOGENEOUS REACTORS
TARGETS
THERMAL REACTORS
TRIGA TYPE REACTORS
TRIGA-TEXAS REACTOR
VAN DE GRAAFF ACCELERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
X RADIATION