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/lp/american-physical-society-aps/be-9-n-c-12-reaction-and-the-parameters-of-the-7-66-mev-state-of-c-12-FpSf30j6dY
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- Publisher
- American Physical Society (APS)
- Copyright
- Copyright © 1960 The American Physical Society
- ISSN
- 1536-6065
- DOI
- 10.1103/PhysRev.120.500
- Publisher site
- See Article on Publisher Site
Abstract
The Be 9 ( α , n ) C 12 reaction has been studied at E ¯ α = 5.6 and 5.78 Mev. Neutron groups have been observed to the first three states of C 12 . The ratio of the population of the 4.43- and 7.66- Mev states has been determined to be 8.1±1 at E ¯ α = 5.6 Mev. This value, together with information from a number of other sources, demonstrates that the 7.66-Mev state has J π = 0 + , that its width for alpha emission is approximately the Wigner limit ( Γ ∼ 8 ev) and that in ∼ 10 - 3 % of the cases the state decays to the ground state of C 12 by pair emission. It is also estimated that the 7.66-Mev state can decay by γ emission via the 2 + , 4.43-Mev state with a probability of 1 5000 . This information reinforces the proposal that the 7.66-Mev state has the necessary properties to participate in the buildup of the elements in red giant stars.
Journal
Physical Review – American Physical Society (APS)
Published: Oct 15, 1960