TY - JOUR
T1 - Searching for the low-energy resonances in the 12C( 12C,n)23Mg reaction cross section relevant for s-process nucleosynthesis
AU - Bucher, B.
AU - Fang, X.
AU - Almaraz-Calderon, S.
AU - Alongi, A.
AU - Ayangeakaa, A. D.
AU - Beard, M.
AU - Best, A.
AU - Browne, J.
AU - Cahillane, C.
AU - Couder, M.
AU - Deboer, R.
AU - Kontos, A.
AU - Long, A.
AU - Lu, W.
AU - Lyons, S.
AU - Notani, M.
AU - Patel, D.
AU - Paul, N.
AU - Roberts, A.
AU - Robertson, D.
AU - Smith, K.
AU - Stech, E.
AU - Talwar, R.
AU - Tan, W.
AU - Tang, X. D.
PY - 2013
Y1 - 2013
N2 - The 12C(12C,n) reaction (Q=-2.6 MeV) is a potential neutron source for the weak s-process occurring in shell-carbon burning of massive stars. The uncertainty in this reaction rate limits our understanding of the production of elements in the range 60 < A < 110. Current stellar models must rely on the smooth extrapolation of a dubious statistical model calculation based on experimental data taken at energies well above the Gamow window which lies below 3.2 MeV. At Notre Dame, this reaction cross section has been measured in finer steps at energies above 3.5 MeV, while successful measurements down to 3.1 MeV have just recently been achieved. In addition, a new extrapolation based on measurements of the mirror system has been developed which predicts a number of low-energy resonances while accounting well for the high-energy resonances. An overview of this work along with the most recent results and astrophysical implications are presented.
AB - The 12C(12C,n) reaction (Q=-2.6 MeV) is a potential neutron source for the weak s-process occurring in shell-carbon burning of massive stars. The uncertainty in this reaction rate limits our understanding of the production of elements in the range 60 < A < 110. Current stellar models must rely on the smooth extrapolation of a dubious statistical model calculation based on experimental data taken at energies well above the Gamow window which lies below 3.2 MeV. At Notre Dame, this reaction cross section has been measured in finer steps at energies above 3.5 MeV, while successful measurements down to 3.1 MeV have just recently been achieved. In addition, a new extrapolation based on measurements of the mirror system has been developed which predicts a number of low-energy resonances while accounting well for the high-energy resonances. An overview of this work along with the most recent results and astrophysical implications are presented.
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U2 - 10.1088/1742-6596/420/1/012141
DO - 10.1088/1742-6596/420/1/012141
M3 - Conference article
AN - SCOPUS:84875970173
SN - 1742-6588
VL - 420
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012141
T2 - 11th International Conference on Nucleus-Nucleus Collisions, NN 2012
Y2 - 27 May 2012 through 1 June 2012
ER -