Study of the beta-delayed alpha-particle emission of 16N
Abstract
The beta-delayed alpha-particle emission of 16N has been studied, with 16N nuclei produced using 80 MeV/nucleon 18O beams on 9Be targets. The 16N secondary nuclei were mass analyzed and separated from the reaction products using the Michigan State University A1200 isotope separator. A detector array, including four thin surface barrier detectors, a p-i-n diode, a Ge gamma-ray detector, and a two-dimensional position sensitive parallel plate avalanche counter, was used for implantation and study of the separated nuclei. A beta-decay branching ratio of (1.3+/-0.3)×10-5 to the 1- state at 9.6 MeV and a centroid of 2.35+/-0.05 MeV for the beta-delayed alpha-particle emission were measured. These results are essential for the analysis of a high sensitivity measurement at Yale University of the low-energy beta-delayed alpha-particle emission of 16N, and for understanding the 12C(α,γ)16O reaction in the helium burning process in massive stars.
- Publication:
-
Physical Review C
- Pub Date:
- July 1993
- DOI:
- 10.1103/PhysRevC.48.429
- Bibcode:
- 1993PhRvC..48..429Z
- Keywords:
-
- 23.40.-s;
- 23.60.+e;
- 97.10.Cv;
- Beta decay;
- double beta decay;
- electron and muon capture;
- Alpha decay;
- Stellar structure interiors evolution nucleosynthesis ages