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Precision measurement of the decay rate ofBe7in host materials
- Source :
- Physical Review C. 75
- Publication Year :
- 2007
- Publisher :
- American Physical Society (APS), 2007.
-
Abstract
- A controlled and precise determination of the cross sections of the fusion reactions {sup 7}Be(p,{gamma}){sup 8}B and {sup 3}He({sup 4}He,{gamma}){sup 7}Be, which play an important role in determining the solar neutrino flux, necessitates the knowledge of a precise value of the electron-capture half-life of {sup 7}Be. This half-life may depend on the material hosting the {sup 7}Be atoms via small modifications of the electron density around the {sup 7}Be nucleus. In this brief communication we report on the measurement of {sup 7}Be implanted in four materials: copper, aluminum, sapphire, and PVC. The four results are consistent with a null host dependence within two standard deviations and their weighted average of 53.236(39) d agrees very well with the adopted value in the literature, 53.22(6) d. The present results may exhibit a slight (0.22%) increase of the half-life at room temperature for metals compared to insulators that requires further studies.
Details
- ISSN :
- 1089490X and 05562813
- Volume :
- 75
- Database :
- OpenAIRE
- Journal :
- Physical Review C
- Accession number :
- edsair.doi...........7fa2e8c801f608fbf0c2f6fda45fcc78