2017年4月
High-precision QEC values of superallowed 0+ → 0+β-emitters 46Cr, 50Fe and 54Ni
Physics letters. B
- 巻
- 767
- 号
- 開始ページ
- 20
- 終了ページ
- 24
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.physletb.2017.01.039
- 出版者・発行元
- Elsevier B.V.
Short-lived 46Cr, 50Fe and 54Ni were studied by isochronous mass spectrometry at the HIRFL-CSR facility in Lanzhou. The measured precision mass excesses (ME) of 46Cr, 50Fe and 54Ni are −29471(11) keV, −34477(6) keV and −39278(4) keV, respectively. The superallowed 0+→0+β-decay Q values were derived to be QEC(46Cr) = 7604(11) keV, QEC(50Fe) = 8150(6) keV and QEC(54Ni) = 8731(4) keV. The values for 50Fe and 54Ni are by one order of magnitude more precise than the adopted literature values. By combining the existing half-lives and branching ratios, we obtained the corrected Ft values to be Ft(50Fe) = 3103(70)s and Ft(54Ni) = 3076(50)s. The main contribution to the Ft uncertainties is now due to β-decay branching ratios, still, more high-precision measurements of the half-lives, the masses, and especially the branching ratios are needed in order to satisfy the requirements for a stringent CVC test.
- リンク情報
- ID情報
-
- DOI : 10.1016/j.physletb.2017.01.039
- ISSN : 0370-2693
- CiNii Articles ID : 120006224082
- CiNii Books ID : AA00774026