Year: 2007
Type: article
Abstract: A controlled and precise determination of the cross sections of the fusion reactions $^{7}\mathrm{Be}$$(p,\ensuremath{\gamma})$$^{8}\mathrm{B}$ and $^{3}\mathrm{He}$($^{4}\mathrm{He}$,$\ensuremath{\gamma}$)$^{7}\mathrm{Be}$, 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 $^{7}\mathrm{Be}$. This half-life may depend on the material hosting the $^{7}\mathrm{Be}$ atoms via small modifications of the electron density around the $^{7}\mathrm{Be}$ nucleus. In this brief communication we report on the measurement of $^{7}\mathrm{Be}$ 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.
Source: Physical Review C
Institutions: Soreq Nuclear Research Center, Weizmann Institute of Science, Institut Laue-Langevin, European Organization for Nuclear Research, Université Paris-Sud, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, University of Manchester, Paul Scherrer Institute
Language: Latvian
Subfield: Radiation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2302408458