The 42Ca(α, γ)46Ti and 42Ca(α, p)45Sc cross sections and the mass-45 bottleneck |
| |
Authors: | L.W. Mitchell R.W. Kavanagh M.E. Sevior C.I.W. Tingwell D.G. Sargood |
| |
Affiliation: | School of Physics, University of Melbourne, Parkville, Victoria 3052, Australia |
| |
Abstract: | The yield of γ-rays from the reaction 42Ca(α, γ)46Ti has been measured as a function of bombarding energy over the range Eα = 3.42–5.62 MeV and from 42Ca(α, pγ)45Sc over the range Eα = 4.06–5.92 MeV, and the yield of protons from the reaction 42Ca(α, p)45Sc has been measured over the range Eα = 4.78–5.92 MeV. Cross sections for all three reactions have been extracted from the data and compared with global statistical-model calculations. The agreement is good. Thermonuclear reaction rates under stellar conditions appropriate for silicon burning are calculated and their significance for the approach to and bridging of the mass-45 bottleneck in the upward flow of nucleosynthesis is discussed. |
| |
Keywords: | Nuclear Reactions |
本文献已被 ScienceDirect 等数据库收录! |
|