High-precision half-life measurement of the β+ decay of 21Na

被引：7
|
作者：
Shidling, P. D. [1 ]
Behling, R. S. [1 ,2 ]
Fenker, B. [1 ,3 ]
Hardy, J. C. [1 ,3 ]
Iacob, V. E. [1 ]
Mehlman, M. [1 ,3 ]
Park, H. I. [1 ]
Roeder, B. T. [1 ]
Melconian, D. [1 ,3 ]
机构：
[1] Texas A&M Univ, Cyclotron Inst, College Stn, TX 77843 USA
[2] Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA
[3] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
来源：
PHYSICAL REVIEW C | 2018年 / 98卷 / 01期
关键词：
LIVES;
D O I：
10.1103/PhysRevC.98.015502
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The beta(+) decay of Na-21 to Ne-21 is one of the four cases currently being used to determine the value of V-ud from nuclear mirror (T = 1/2) transitions. To date, published values for the half-life of Na-21 have not been consistent with one another. We report here a new measurement of the half-life: 22.4615 +/- 0.0039((stat)) +/-(0.0001)(0.0015(syst))s. This result increases the world average of the Na-21 half-life by 0.0048 s and reduces the uncertainty by a factor of 1.5.
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页数：7
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