Abstract
The photodisintegration cross section of the 9 Be(1/2 + ) state is investigated in a framework of the α + α + n three-body model. The 1/2 + state of 9 Be locates just above the three-body threshold, and the s -wave neutron property of this state is a long-standing problem. It has been a topic of quite interest in relation to the breakup mechanism of 9 Be into the 8 Be(0 + ) + n and ( α + α + n ) channels.
Highlights
The elements heavier than iron are mainly produced by the r-process in supernovae [1]
The photodisintegration cross section of the 9Be(1/2+) state is investigated in a framework of the α + α + n three-body model
They reported that the stellar reaction rate of 8Be(n, γ)9Be depends strongly on the properties of the 1/2+ state of 9Be just located above the α + α + n three-body threshold energy
Summary
The elements heavier than iron are mainly produced by the r-process in supernovae [1]. Buchmann et al [3] discussed the calculation of this reaction rate They reported that the stellar reaction rate of 8Be(n, γ)9Be depends strongly on the properties of the 1/2+ state of 9Be just located above the α + α + n three-body threshold energy. The measured photodisintegration cross sections of the 1/2+ state of 9Be in Refs. EPJ Web of Conferences component on the total cross section clearly, we calculate the decomposed E1 transition strengths for the 1/2+ state. We find a peak in photodisintegration cross section using the α + α + n three-body model, which agrees well with the newly measured data [7]. The 5/2+ state, a resonance energy and the contribution to the E1 strength are calculated
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