Determination of radioactive nuclides of uranium and thorium series and estimation of α-flux in LSI constituent materials |
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Authors: | H Yonezawa K Kudo |
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Institution: | (1) Ibaraki Electrical Communication Laboratory, Nippon Telegraph and Telephone Public Corporation, 319-11 Tokai, Ibaraki, (Japan) |
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Abstract: | Gamma-rays of nuclides of uranium and thorium series in silicone resin and ceramics were measured with a Ge(Li) detector. The state of radioactive equilibrium was determined by comparing the concentrations of uranium and thorium with the radioactive concentrations of214Pb and212Pb. The radioactive equilibrium was attained in silicone resin but not in ceramics. The -flux was calculated from the concentrations of uranium and thorium and their daughter nuclides. The calculated values of -flux agreed with that of -flux measured. |
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