High-precision QEC values of superallowed 0+→ 0+ β-emitters 46Cr, 50Fe and 54Ni | Zendy

Peng Zhang | Zendy; X. Xu | Zendy; P. Shuai | Zendy; R.J. Chen | Zendy; Xin Yan | Zendy; Yuxiang Zhang | Zendy; M. Wang | Zendy; Yu. A. Litvinov | Zendy; K. Blaum | Zendy; Hu Xu | Zendy; Tong Bao | Zendy; X. C. Chen | Zendy; H. Chen | Zendy; Chuancheng Fu | Zendy; J. He | Zendy; S. Kubono | Zendy; Y. H. Lam | Zendy; Deyu Liu | Zendy; R.S. Mao | Zendy; X. Ma | Zendy; M. Z. Sun | Zendy; X. L. Tu | Zendy; Y. M. Xing | Zendy; Jiancheng Yang | Zendy; Y.J. Yuan | Zendy; Q. Zeng | Zendy; Xu Zhou | Zendy; Xianming Zhou | Zendy; Wenlong Zhan | Zendy; S. Litvinov | Zendy; G. Audi | Zendy; T. Uesaka | Zendy; Y. Yamaguchi | Zendy; Takayuki Yamaguchi | Zendy; A. Ozawa | Zendy; B. Sun | Zendy; Y. Sun | Zendy; F. R. Xu | Zendy

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High-precision QEC values of superallowed 0+→ 0+ β-emitters 46Cr, 50Fe and 54Ni

Author(s) -

Peng Zhang,

X. Xu,

P. Shuai,

R.J. Chen,

Xin Yan,

Yuxiang Zhang,

M. Wang,

Yu. A. Litvinov,

K. Blaum,

Hu Xu,

Tong Bao,

X. C. Chen,

H. Chen,

Chuancheng Fu,

J. He,

S. Kubono,

Y. H. Lam,

Deyu Liu,

R.S. Mao,

X. Ma,

M. Z. Sun,

X. L. Tu,

Y. M. Xing,

Jiancheng Yang,

Y.J. Yuan,

Q. Zeng,

Xu Zhou,

Xianming Zhou,

Wenlong Zhan,

S. Litvinov,

G. Audi,

T. Uesaka,

Y. Yamaguchi,

Takayuki Yamaguchi,

A. Ozawa,

B. Sun,

Y. Sun,

F. R. Xu

Publication year - 2017

Publication title -

physics letters b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.093

H-Index - 283

eISSN - 1873-2445

pISSN - 0370-2693

DOI - 10.1016/j.physletb.2017.01.039

Subject(s) - physics , branching (polymer chemistry) , branching fraction , nuclear physics , atomic physics , chemistry , organic chemistry

International audienceShort-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 46 Cr, 50 Fe and 54 Ni 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(Cr46)=7604(11) keV , QEC(Fe50)=8150(6) keV and QEC(Ni54)=8731(4) keV . The values for 50 Fe and 54 Ni 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(Fe50)=3103(70) s and Ft(Ni54)=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

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