Investigation of excited states in Mg22 via resonant elastic scattering of Na21+p and its astrophysical implications

J. J. He, S. Kubono, T. Teranishi, J. Hu, M. Notani, H. Baba, S. Nishimura, J. Y. Moon, M. Nishimura, H. Iwasaki, Y. Yanagisawa, N. Hokoiwa, M. Kibe, J. H. Lee, S. Kato, Y. Gono, C. S. Lee

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Abstract

The excited states in Mg22 have been investigated by the resonant elastic scattering of Na21+p. A 4.0 MeV/nucleon Na21 beam was separated by the Center for Nuclear Study (CNS) radioactive ion beam separator (CRIB) and then used to bombard a thick (CH2)n target. The energy spectra of recoiled protons were measured at scattering angles of θc.m. 172,146, and 134, respectively. A wide energy-range of excitation function in Mg22 (up to Ex~8.9 MeV) was obtained simultaneously with a thick-target method, and a state at 7.06 MeV was newly observed. The resonant parameters were deduced from an R-matrix analysis of the center-of-mass (c.m.) differential cross-section data with a SAMMY-M6-BETA code. The astrophysical resonant reaction rate for the Ne18(α,p)Na21 reaction was recalculated based on the present parameters. Generally speaking, the present rates are much smaller than the previous ones.

Original languageEnglish
Article number015801
JournalPhysical Review C - Nuclear Physics
Volume80
Issue number1
DOIs
Publication statusPublished - Aug 6 2009

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    He, J. J., Kubono, S., Teranishi, T., Hu, J., Notani, M., Baba, H., Nishimura, S., Moon, J. Y., Nishimura, M., Iwasaki, H., Yanagisawa, Y., Hokoiwa, N., Kibe, M., Lee, J. H., Kato, S., Gono, Y., & Lee, C. S. (2009). Investigation of excited states in Mg22 via resonant elastic scattering of Na21+p and its astrophysical implications. Physical Review C - Nuclear Physics, 80(1), [015801]. https://doi.org/10.1103/PhysRevC.80.015801