Elsevier

Nuclear Physics A

Volume 226, Issue 3, 8 July 1974, Pages 493-505
Nuclear Physics A

Cross sections of the 21Ne(α, n)24Mg and 22Ne(α, n)25Mg reactions at low energies of astrophysical interest

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Abstract

The 21Ne(α, n)24Mg reaction has been studied over the energy range Ec.m. = 1.4−2.57MeV, by neutron time-of-flight spectroscopy and by the detection of the subsequent γ-ray transitions in 24Mg. The astrophysical cross-section factor S(0) was determined and reaction rates were calculated for temperatures up to 5×109°K. In favorable circumstances, this reaction can provide a significant neutron flux for nucleosynthesis. The absolute normalization of the cross sections obtained in our earlier work on the reaction 22Ne(α, n)25Mg has also been verified.

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Supported in part by the National Science Foundation [GP-28027].

††

Present address: Physics Department, Queens's University, Kingston, Ontario, Canada.

†††

Present address: Physics Department, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel.

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