Low-energy behavior of the 3He(α, γ)7Be cross section |
| |
| Authors: | JL Osborne CA Barnes RW Kavanagh RM Kremer GJ Mathews JL Zyskind PD Parker AJ Howard |
| |
| Institution: | 1. A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 USA;2. W. K. Kellogg Laboratory, California Institute of Technology, Pasadena, California 91125, USA;3. Trinity College, Hartford, Connecticut 06106 USA;4. W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA |
| |
| Abstract: | Cross sections for the 3He(α, γ)7Be reaction have been measured at several energies from Ec.m. = 165 to 1169 keV by counting prompt γ-rays from a windowless, differentially pumped, recirculating, 3He gas target. The cross-section factor S34(Ec.m.) and branching ratio γ1/γ0 were determined at each energy. Cross sections were also measured at Ec.m. = 947 and 1255 keV by counting the γ-rays from the 7Be produced in a 3He gas cell with a Ni entrance foil. Combining the results of these two independent experiments yields a zero-energy intercept for the cross-section factor of S34(0) = 0.53 ± 0.03 keV · b. The relationship between these measurements and several theoretical calculations, and the import of the extrapolated cross section for the solar-neutrino problem are discussed. |
| |
| Keywords: | Nuclear reactions |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
