Absolute cross sections of the⁸⁶Sr(α,n)⁸⁹Zr reaction at energies of astrophysical interest

Abstract

Abstract.Absolute cross sections for the 86 Sr(α,n) 89 Zr reaction at energies close to the Gamow window are reported. Three thin SrF 2 targets were irradiated using the 9 MV Tandem facility in IFIN-HH Bucharest that delivered α beams for the activation process. Two high-purity Germanium detectors were used to measure the induced activity of 89 Zr in a low background environment. The experimental results are in very good agreement with Hauser-Feshbach statistical model calculations performed with the TALYS code.

Consistent optical potential for incident and emitted low-energy α particles. II. α emission in fast-neutron-induced reactions on Zr isotopes

“…Finally, a still open question concerns the optical potential which may be able to describe the α-particle emission at least in fast-neutron induced reactions. The present analysis of the (n, α) reaction on 90,94 Zr pointed out that the α-particle OMP [7], which provides a suitable description of the α-particle induced reaction data within the wide mass range 45≤A≤209, including Sr isotopes [55], has led to underestimated HF as well as PE calculation results. Much improved calculated cross sections which are obtained using the OMP found earlier to describe the neutron-induced α emission [56] make apparent two points.…”

“…The α-particle optical potential for nuclei within the 45≤A≤209 range [7] was firstly used for both α-induced reaction and α-emission calculations, following the conclusions corresponding to the A∼60 nuclei [3]. Moreover, this potential has recently been found to describe well the (α, n) reaction cross section for 84,86,87 Sr isotopes [55]. However, following the discussion on the (n, α) reactions in Sec.…”