## 抄録

The asymptotic behavior of the FP decay heat has been studied toward the very short cooling-time range down to 0.1s after a fission event. For this purpose we apply the second generation of the gross theory of β-decay and estimate the decay properties of short-lived FP nuclides. In order to reproduce the recent measurements adequately, we introduce a new parameter named the Q_{00}-factor, and optimize it in terms of the calculation of the half-lives and the average β- and γ-ray energy releases per decay (E_{β−} and E_{γ}-values). The favorable value of the Q_{00}-factor is 1.0 for the half-lives and about 0.4 for the E_{β−} and E_{γ}-values. The E_{β} and E_{γ}-values thus calculated for the short-lived nuclides, whose β-decay Q-values are larger than 3–4 MeV, guarantee a good reproduction of asymptotic behavior of the measured decay heat toward the very short cooling-time range. Adoption of the present calculation to data files for the summation calculations is recommended from a practical point of view.

本文言語 | English |
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ページ（範囲） | 491-497 |

ページ数 | 7 |

ジャーナル | Journal of Nuclear Science and Technology |

巻 | 37 |

号 | 6 |

DOI | |

出版ステータス | Published - 2000 6月 |

## ASJC Scopus subject areas

- 核物理学および高エネルギー物理学
- 原子力エネルギーおよび原子力工学