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Photostimulated detection of defect formation in BaF 2 under irradiation of synchrotron radiation
Author(s) -
Watanabe Masayuki,
Azuma Junpei,
Asaka Shuji,
Tsujibayashi Toru,
Arimoto Osamu,
Nakanishi Shunsuke,
Itoh Hiroshi,
Kamada Masao
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201248301
Subject(s) - photoexcitation , synchrotron radiation , irradiation , atomic physics , exciton , laser , materials science , excitation , luminescence , electron , relaxation (psychology) , spectroscopy , photon , photon energy , synchrotron , fluence , extreme ultraviolet , molecular physics , chemistry , optics , optoelectronics , physics , condensed matter physics , nuclear physics , excited state , psychology , social psychology , quantum mechanics
Abstract We have investigated the defect formation processes of BaF 2 single crystals under vacuum ultraviolet radiation with the use of combination spectroscopy of synchrotron radiation (SR) and laser. The defect formation efficiency was measured as a function of excitation photon energy of SR by means of a laser‐induced luminescence method. It was found that the efficiency depends significantly on the excitation photon energy. We show that the dependence can be explained in terms of the diffusive motion of hot conduction electrons generated by the photoexcitation. The relationship between the defect formation and the energy relaxation of core excitons is also discussed.