Precision measurement of the decay rate of Be7 in host materials

Y. Nir-El, G. Haquin, Z. Yungrais, M. Hass, G. Goldring, S. K. Chamoli, B. S.Nara Singh, S. Lakshmi, U. Köster, N. Champault, A. Dorsival, G. Georgiev, V. N. Fedoseyev, B. A. Marsh, D. Schumann, G. Heidenreich, S. Teichmann

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


A controlled and precise determination of the cross sections of the fusion reactions Be7(p,I )B8 and He3(He4,I )Be7, 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 Be7. This half-life may depend on the material hosting the Be7 atoms via small modifications of the electron density around the Be7 nucleus. In this brief communication we report on the measurement of Be7 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.

Original languageEnglish
Article number012801
JournalPhysical Review C - Nuclear Physics
Issue number1
StatePublished - 1 Jan 2007
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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