α-induced cross sections ofCd106for the astrophysicalpprocess

Abstract

The 106 Cd(α, γ) 110 Sn reaction cross section has been measured in the energy range of the Gamow window for the astrophysical p-process scenario. The cross sections for 106 Cd(α,n) 109 Sn and for 106 Cd(α,p) 109 In below the (α,n) threshold have also been determined. The results are compared with predictions of the statistical model code NON SMOKER using different input parameters. The comparison shows that a discrepancy for 106 Cd(α, γ) 110 Sn when using the standard optical potentials can be removed with a different α+ 106 Cd potential. Some astrophysical implications are discussed.

Measurement of120Te(α,n) cross sections relevant to the astrophysicalp

“…These rates are typically calculated with the statistical Hauser Feshbach (HF) model [4] in a reaction network involving thousands of nuclei. However, the HF model predictions are in disagreement with measured (α,γ) cross sections at low energies [5,6]. To improve the reliability of the HF reaction rates, experimental verifications and constraints are needed.…”

“…In recent years, a number of α-beam activation measurements have been conducted for targets relevant to pprocess [5][6][7][8][9][10][11][12][13]. Cross sections of the corresponding (α,x) reactions were measured at, or close to, the astrophysically relevant energy.…”

Systematic study of theα-optical potential via elastic scattering near theZ=50region forp-process nuclei

“…The data were taken from Ref. [12] and compared with the calculations using the new parametrization proposed in Sec. IV B (solid lines), that of McFadden and Satchler [29] (dashed lines), and Potential I of Demetriou et al [34] (dotted lines) for the α-optical potential.…”

“…Generally large discrepancies, within a factor of 10, were observed between the data and model predictions. In particular, the widely used NON-SMOKER calculations [18] tend to over-predict the (α,γ) cross sections especially at lower energies [12,13]. One of the possible causes is the uncertainty of the α-optical potential used in the HF calculations.…”

“…Contrarily and complementarily, the inverse (α,γ) reactions have often been studied via activation technique. In recent years, a number of α-beam activation measurements have been conducted for targets relevant to p process [9][10][11][12][13][14][15][16][17]. Cross sections of the corresponding (α,x) reactions were measured at or close to the astrophysically relevant energy.…”