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L AND M X-RAY PRODUCTION CROSS SECTIONS OF HEAVY RARF EARTH ELEMENTS IN THE 3-40 MeV/amu PROJECTILE-ENERGY RANGE

K. SERA

Cyclotron Research Center, Iwate Medical University, Tomegamori, 020-01 Takizawa, Japan

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K. ISHII

Cyclotron Radioisotope Center, Tohoku University, Aramaki, Aoba, 980 Sendai, Japan

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, and

H. ORIHARA

Cyclotron Radioisotope Center, Tohoku University, Aramaki, Aoba, 980 Sendai, Japan

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https://doi.org/10.1142/S0129083598000285Cited by:1 (Source: Crossref)

Abstract

Partial L- and M-x-ray production cross sections for Dy, Er and Lu have been systematically measured over the wide projectile-energy range of 3-40 MeV/amu for proton and ³He-ion impact, and values of partial x-ray production cross sections were compared with those predicted by the ECPSSR theory. As the result, it is confirmed that the ECPSSR theory gives consistent ionization cross sections for each subshell in L- and M-shells. It is also found that values of x-ray transition rate are correct for Mα,β and Lα₁₂ lines which are predominant in M and L x-ray spectra, respectively. However, it is pointed out that some of the values of x-ray transition rates must be revised, and improved values were obtained experimentally for the first time.

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