Spectroscopy of Al24 and extraction of Gamow-Teller strengths with the Mg24(He3,t) reaction at 420 MeV

R. G.T. Zegers, R. Meharchand, T. Adachi, Sam M. Austin, B. A. Brown, Y. Fujita, M. Fujiwara, C. J. Guess, H. Hashimoto, K. Hatanaka, M. E. Howard, H. Matsubara, K. Nakanishi, T. Ohta, H. Okamura, Y. Sakemi, Y. Shimbara, Y. Shimizu, C. Scholl, A. SignoracciY. Tameshige, A. Tamii, M. Yosoi

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The Mg24(He3,t)24Al reaction was studied at E(3He)=420 MeV. An energy resolution of 35 keV was achieved. Gamow-Teller strengths to discrete levels in Al24 were extracted by using a recently developed empirical relationship for the proportionality between Gamow-Teller strengths and differential cross sections at zero momentum transfer. Except for small discrepancies for a few weak excitations, good agreement with previous Mg24(p,n) data and nuclear-structure calculations using the USDA/B interactions in the sd shell-model space was found. The excitation energy of several levels in Al24 of significance for determination of the Mg23(p,γ)24Al thermonuclear reaction rate were measured. Results are consistent with two of the three previous (He3,t) measurements, performed at much lower beam energies. However, a new state at Ex(24Al)=2.605(10) MeV was found and is the third state above the proton separation energy.

Original languageEnglish
Article number014314
JournalPhysical Review C - Nuclear Physics
Issue number1
Publication statusPublished - 23-07-2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics


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