Direct Measurement of the 21Na(p, γ) 22Mg Reaction: Resonance Strengths and Gamma-Gamma Analysis

• Published in: Nuclear physics. A Vol. 758; pp. 729 - 732
• Main Authors: Trinczek, M., Jewett, C.C., D'Auria, J.M., Bishop, S., Buchmann, L., Chen, A.A., Engel, S., Gigliotti, D., Greife, U., Hunter, D., Hussein, A., Hutcheon, D., José, J., Laird, A.M., Lamey, M., Lewis, R., Olin, A., Ottewel, D., Parker, P., Pavan, M.M., Pearson, J.E., Rogers, J., Ruiz, C., Wrede, C.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2005
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2005.05.131

A series of astrophysical measurements was recently completed at TRIUMF, related to the unknown total rate of the 21Na(p, γ) 22Mg reaction. With a high intensity 21Na beam from the ISAC facility, the DRAGON recoil mass spectrometer was used to directly measure seven resonances at center of mass energies from E c.m. = 200 to 1135 keV and determine their respective contributions to the 21Na(p, γ) 22Mg reaction rate in novae and x-ray bursts, as well as their impact on 22Na production in novae. This study also allowed the investigation of different excited states in 22Mg; proposed decays and spin assignments are given for the 6246, 6329, and 6609 keV levels.