Akademik Veri Yönetim Sistemi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, cilt.366, ss.145-149, 2016 (SCI-Expanded)
The azimuthal and polar angle dependence of L X-ray was investigated in the same experimental setup to remove the existing ambiguity about alignments measurements. We measured Ll, L alpha, L beta and L gamma X-ray differential cross sections of Yb for several different azimuthal angles (30 degrees, 20 degrees, 10 degrees, 0 degrees, -10 degrees and 20 degrees) and polar angles (90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees and 140 degrees) at 59.54 keV photon energy by using a Si(Li) detector. The azimuthal angle dependence of Ll and L alpha X-rays were observed. The azimuthal anisotropy of L beta and L gamma X-rays were not observed. On the other hand, differential cross-sections for L beta and L gamma X-rays were found independent on the polar angle within experimental error, those for Ll and L alpha X-rays depended on the polar angles. Azimuthal and polar angles dependence of L X-ray differential cross-sections contrast with the other experimental and theoretical results, which report evidence of the isotropic emission of Ll and L alpha X-rays following photoionization. (C) 2015 Elsevier B.V. All rights reserved.