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Applications of TAGS data in beta decay energies and decay heat calculations

ベータ崩壊エネルギー及び崩壊熱計算へのTAGSデータの適用

Pham, N. S.*; 片倉 純一

Pham, N. S.*; Katakura, Junichi

全吸収$$gamma$$線分光器(TAGS: Total Absorption Gamma-ray Spectrometer)を用いて幾つかの核分裂生成物(FP)に対して得られたベータ線強度の最近の測定データを平均エネルギー,スペクトル計算や崩壊熱総和計算に適用した。測定で得られたベータ強度を用いてベータ崩壊の大局的理論により平均エネルギーやスペクトル計算を実施した。JENDL FP Decay Data File 2000のデータを用いた計算との違いを検討した。$$^{144}$$La及び$$^{141}$$Csの崩壊エネルギーに関し新たな推定値を提案した。

The recent data of beta-decay intensity measured by using the total absorption $$gamma$$-ray spectrometer (TAGS), for several fission products (FP), has been applied for calculations of the average energies and spectra, and decay heat summations. The calculations were performed based on the Gross theory of beta decay, in which the beta strength functions were experimentally derived from TAGS data. The deviations of decay heat power predictions from the original decay data of JENDL Decay Data File 2000, when applying the present values of average energies, were investigated. New estimations of decay energy data for $$^{144}$$La and $$^{141}$$Cs are proposed.

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