%0 Journal Article
%A Zhang, P.
%A Xu, X.
%A Shuai, P.
%A Chen, R. J.
%A Yan, X. L.
%A Zhang, Y. H.
%A Wang, M.
%A Litvinov, Yury
%A Blaum, K.
%A Xu, H. S.
%A Bao, T.
%A Chen, X. C.
%A Chen, H.
%A Fu, C. Y.
%A He, J. J.
%A Kubono, S.
%A Lam, Y. H.
%A Liu, D. W.
%A Mao, R. S.
%A Ma, X. W.
%A Sun, M. Z.
%A Tu, X. L.
%A Xing, Y. M.
%A Yang, J. C.
%A Yuan, Y. J.
%A Zeng, Q.
%A Zhou, X.
%A Zhou, X. H.
%A Zhan, W. L.
%A Litvinov, S.
%A Audi, G.
%A Uesaka, T.
%A Yamaguchi, Y.
%A Yamaguchi, T.
%A Ozawa, A.
%A Sun, B. H.
%A Sun, Y.
%A Xu, F. R.
%T High-precision Q<sub>EC</sub> values of superallowed 0<sup>+</sup> → 0<sup>+</sup> β-emitters <sup>46</sup>Cr, <sup>50</sup>Fe and <sup>54</sup>Ni
%J Physics letters / B
%V 767
%@ 0370-2693
%C Amsterdam
%I North-Holland Publ.
%M GSI-2018-00147
%P 20 - 24
%D 2017
%Z Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics "Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3."
%X Short-lived 46 Cr, 50 Fe and 54 Ni 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 Q EC (46 Cr) = 7604(11) keV, Q EC (50 Fe) = 8150(6) keV and Q EC (54 Ni) = 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000397861700004
%R 10.1016/j.physletb.2017.01.039
%U https://repository.gsi.de/record/208764