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Tritation of benzoic acid by 6 Li(n,α) 3 H reaction with enriched lithium‐6
Author(s) -
Oohashi Kunio,
Nogawa Norio,
Makide Yoshihiro,
Morikawa Naotake,
Izumo Misiroku
Publication year - 1998
Publication title -
journal of labelled compounds and radiopharmaceuticals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 47
eISSN - 1099-1344
pISSN - 0362-4803
DOI - 10.1002/(sici)1099-1344(1998100)41:10<951::aid-jlcr148>3.0.co;2-k
Subject(s) - chemistry , tritium , lithium (medication) , benzoic acid , irradiation , radiochemistry , benzene , neutron , ring (chemistry) , abundance (ecology) , isotopes of lithium , lithium atom , neutron temperature , nuclear chemistry , ion , organic chemistry , nuclear physics , ionization , medicine , physics , fishery , ion exchange , biology , endocrinology
Lithium benzoate containing 95 atom% lithium‐6 (abbreviation: enriched) was tritiated by neutron irradiation in a pile. The degree of tritium incorporation to the benzene ring was 6.9 to 7.6 times that for the benzoate of natural isotopic abundance (abbreviation: natural abundance) according to the sample size, i.e., the geometries of irradiation samples were compared under the same thermal neutron fluence. The computed self‐shielding effect for incident neutrons was negligible in the irradiation of the latter benzoate, while in the case of the former one rather large effects were observed in thick samples used in the present experiment. The tritium distribution in the benzene ring showed a slight ortho orientation in the irradiation of enriched 6 Li compound, but was almost uniform in the other compounds. Copyright © 1998 John Wiley & Sons, Ltd.