| Autor: |
Knecht A; Department of Physics and Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA. knechta@uw.edu, Hong R, Zumwalt DW, Delbridge BG, García A, Müller P, Swanson HE, Towner IS, Utsuno S, Williams W, Wrede C |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2012 Mar 23; Vol. 108 (12), pp. 122502. Date of Electronic Publication: 2012 Mar 23. |
| DOI: |
10.1103/PhysRevLett.108.122502 |
| Abstrakt: |
Studies of 6He beta decay along with tritium can play an important role in testing ab initio nuclear wave-function calculations and may allow for fixing low-energy constants in effective-field theories. Here, we present an improved determination of the 6He half-life to a relative precision of 3×10(-4). Our value of 806.89±0.11(stat)(-0.19syst)(+0.23) ms resolves a major discrepancy between previous measurements. Calculating the statistical rate function we determined the ft value to be 803.04(-0.23)(+0.26) s. The extracted Gamow-Teller matrix element agrees within a few percent with ab initio calculations. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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