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L x‐ray fluorescence cross‐sections of heavy elements in the atomic region 57 ≤ Z ≤ 71 excited by 17.78 keV photons
Author(s) -
Salah Wa'el
Publication year - 2004
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.741
Subject(s) - excited state , atomic physics , fluorescence , excitation , x ray , physics , photon , x ray fluorescence , line (geometry) , atomic number , analytical chemistry (journal) , chemistry , nuclear physics , optics , geometry , mathematics , quantum mechanics , chromatography
L x‐ray fluorescence cross‐sections (σ Lα , σ Lβ , and σ Lγ ) were measured with an accuracy of 6% (except for the L γ x‐ray line around 8%) for La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Tm, Yb and Lu at an excitation energy of 17.78 keV. Relative intensities I Kβ / I Kα and I Lγ / I Lα were also measured for the same elements. The measured cross‐sections were compared with experimental and theoretical values. Measurements of the emitted x‐rays were performed using an Si(Li) detector. Copyright © 2004 John Wiley & Sons, Ltd.