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The Yields of Radioactivities Induced by (γ, n) Reactions with 20 MeV Bremsstrahlung

1967; Oxford University Press; Volume: 40; Issue: 3 Linguagem: Inglês

10.1246/bcsj.40.575

1348-0634

Yoshinaga OKA, Toyoaki Kato, Koichi Nomura, Tatsuya Saito,

Boron Compounds in Chemistry

Abstract The yields of radioactivities resulting from the (γ, n) reactions on 37 elements covering the periodic table have been determined by means of 20 MeV linear accelerator bremsstrahlung and gamma-ray spectrometry. The yield values, as measured in the number of photodisintegrations per mole per roentgen for each of the (γ, n) reactions, increase in the main regularly with atomic number from 103 through 107 order of magnitude. Anomalously small yield values are obtained in the irradiation of the nuclides with neutron or proton number of the magic numbers. The present results permit studies of general behavior of the photoneutron reactions and of the application of their products to the photoactivation analyses of many elements distributed throughout the periodic table.