Calculation of beta decay half-lives and delayed neutron branching ratio of fission fragments with Skyrme-QRPA
湊 太志
Minato, Futoshi
Nuclear beta-decay and delayed neutron (DN) emission is important for the $$r$$-process nucleosynthesis after the freeze-out and stable and safe operation of nuclear reactors. Even though radioactive beam facilities have enabled us to measure beta-decay and DN branching ratio of neutron-rich nuclei apart from the stability line in the nuclear chart, there are still a lot of nuclei which one cannot investigate. In particular, information on DN is rather scarce than that of $$T_{1/2}$$. To predict $$T_{1/2}$$ and DN branching ratios, we recently developed a method which comprises QRPA and Hauser-Feshbach model. In this work, we calculate fission fragments with $$T_{1/2}le50$$. We obtain the RMS deviation from experimental half-life of 5.06. However, there are odd-even staggering when looking at theoretical $$T_{1/2}$$ along an isotopic chain, which is not observed experimentally. There are also deviations of DN branching ratios. We discuss the cause of these problems and how to remedy them.
使用言語 : English
掲載資料名 : EPJ Web of Conferences (Internet)
: 122
ページ数 : p.10001_1 - 10001_13
発行年月 : 2016/06
出版社名 : EDP Sciences
発表会議名 : 5th International Workshop on Compound-Nuclear Reactions and Related Topics (CNR$$^{*}$$15)
開催年月 : 2015/10
開催都市 : Tokyo
開催国 : Japan
特許データ :
論文URL :
キーワード : no keyword
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 :
登録番号 : BB20150323
抄録集掲載番号 : 44001187
論文投稿番号 : 17869
Accesses  (From Jun. 2, 2014)
- Accesses
Add This