MG-25(ALPHA,N)SI-28 AND MG-26(ALPHA,N)SI-29 AS NEUTRON SOURCES IN EXPLOSIVE NEON BURNING
MR ANDERSON, LW MITCHELL, ME SEVIOR, DG SARGOOD
NUCLEAR PHYSICS A | ELSEVIER SCIENCE BV | Published : 1983
The yields of neutrons from the reaction 25Mg(α, n)28Si and of γ-rays from the reaction 25Mg(α, nγ)28Si have been measured as a function of bombarding energy over the range 1.8-6.3 MeV, and the yield of neutrons from 26Mg(α, n)29Si has been measured over the range 1.8-6.0 MeV. Cross sections for 25, 26Mg(α, n)28, 29Si were extracted from the data and compared with global statistical-model calculations. The agreement is very good. Thermonuclear reaction rates under stellar conditions appropriate for explosive neon burning are calculated and their significance for the nucleosynthesis of rare neutron-rich nuclei is discussed. © 1983.