The 21 Na (p,γ) 22 Mg reaction from Ec.m. =200 to 1103 keV in novae and x-ray bursts
Abstract
The long-lived radioactive nuclide 22 Na ( t1/2 =2.6 yr) is an astronomical observable for understanding the physical processes of oxygen-neon novae. Yields of 22Na in these events are sensitive to the unknown total rate of the 21 Na (p,γ) 22 Mg reaction. Using a high intensity 21 Na beam at the TRIUMF-ISAC facility, the strengths of seven resonances in 22 Mg , of potential astrophysical importance, have been directly measured at center of mass energies from Ec.m. =200 to 1103 keV . We report the results obtained for these resonances and their respective contributions to the 21 Na (p,γ) 22 Mg rate in novae and x-ray bursts, and their impact on 22 Na production in novae.
- Publication:
-
Physical Review C
- Pub Date:
- June 2004
- DOI:
- 10.1103/PhysRevC.69.065803
- Bibcode:
- 2004PhRvC..69f5803D
- Keywords:
-
- 25.40.Lw;
- 26.30.+k;
- 21.10.-k;
- 27.30.+t;
- Radiative capture;
- Nucleosynthesis in novae supernovae and other explosive environments;
- Properties of nuclei;
- nuclear energy levels;
- 20<
- =A<
- =38