Abstract
Experimental studies on astrophysical reactions involving radioactive isotopes (RI) often accompany technical challenges. Studies on such nuclear reactions have been conducted at the low-energy RI beam separator CRIB, operated by Center for Nuclear Study, the University of Tokyo. We discuss two cases of astrophysical reaction studies at CRIB; one is for the 7Be+n reactions which may affect the primordial 7Li abundance in the Big-Bang nucleosynthesis, and the other is for the 22Mg(α, p) reaction relevantin X-raybursts.
Highlights
Astrophysical reactions involving radioactive isotopes (RI) often play an important role in explosive stellar environments
We introduce below two latest works at CRIB [5, 6], in which RI-involving astrophysical reactions were measured at astrophysical energies in indirect ways
We have studied the 7Be(n, p0)7Li, 7Be(n, p1)7Li∗and 7Be(n, α)4He reactions, which may affect the primordial 7Li abundance [5]
Summary
Astrophysical reactions involving radioactive isotopes (RI) often play an important role in explosive stellar environments. Reaction measurements with RI beams often suffer from the limitation of beam intensities, which are typically as small as 105 particles per second (pps) or less, while > 1014 pps is available for light-ion beams. This great difference in the beam intensity is fundamental for the feasibility of the measurement. We discuss possible approaches to study RI-involving reactions in spite of the technical limitation of the RI beam, introducing recent representative results from the low-energy RI beam facility CRIB [1,2,3] of the University of Tokyo.
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