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L-shell x-ray production cross sections for $sup 16$O ions on Ce, Pr, Sm, Eu, Dy, and Ho: 0.50 to 2.25 MeV/amu

Journal Article · · Phys. Rev., A, v. 12, no. 4, pp. 1237-1245
OSTI ID:4178260
; ; ; ;
L-shell and individual x-ray production cross sections for 8--36-MeV oxygen ions on thin solid targets of Ce, Pr, Sm, Eu, Dy, and Ho are measured and compared with predictions of theories of direct Coulomb ionization. In comparing theory and experiment, we use, with reasonable justification, fluorescence yields, Coster-Kronig yields, and radiative widths obtained from single-hole initial configurations. The theoretical treatment which provides the best overall fit to the data is the plane-wave Born approximation with corrections for Coulomb deflection of the projectile and increased binding of the target electrons. The effects of multiple ionization are examined through measurement of x-ray energy shifts as measured with Si(Li) detectors and by vacuum crystal- spectrometer measurements of L x-ray spectra produced by 3-MeV proton and 25-MeV oxygen-ion bombardment of a thick La target.
Research Organization:
Department of Physics, North Texas State University, Denton, Texas 76203
NSA Number:
NSA-33-004013
OSTI ID:
4178260
Journal Information:
Phys. Rev., A, v. 12, no. 4, pp. 1237-1245, Journal Name: Phys. Rev., A, v. 12, no. 4, pp. 1237-1245; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

*CERIUM-- ION COLLISIONS
*DYSPROSIUM-- ION COLLISIONS
*EUROPIUM-- ION COLLISIONS
*HOLMIUM-- ION COLLISIONS
*OXYGEN IONS-- COLLISIONS
*PRASEODYMIUM-- ION COLLISIONS
*SAMARIUM-- ION COLLISIONS
640304* --Physics Research--Atomic
Molecular & Chemical Physics--Collision Phenomena
BORN APPROXIMATION
COULOMB SCATTERING
CROSS SECTIONS
IONIZATION
MEV RANGE 01-10
MEV RANGE 10-100
N60400* --Physics (Atomic & Molecular)--Collision Phenomena
SPECTRAL SHIFT
X RADIATION