par Pogliano, F.;Larsen, A.C.;Goriely, Stéphane 
;Siess, Lionel ;Markova, Maria;Görgen, Andreas;Heines, J.;Ingeberg, V.W.;Kjus, R.G.;Larsson, J.E.L.;Li, K.C.W.;Martinsen, E.M.;Owens-Fryar, G.J.;Pedersen, L.G.;Siem, Sunniva;Torvund, G.S.;Tsantiri, A.
Référence Physical review. C, Nuclear physics, 107, page (064614)
Publication Publié, 2023-06-28
;Siess, Lionel ;Markova, Maria;Görgen, Andreas;Heines, J.;Ingeberg, V.W.;Kjus, R.G.;Larsson, J.E.L.;Li, K.C.W.;Martinsen, E.M.;Owens-Fryar, G.J.;Pedersen, L.G.;Siem, Sunniva;Torvund, G.S.;Tsantiri, A.Référence Physical review. C, Nuclear physics, 107, page (064614)
Publication Publié, 2023-06-28
Article révisé par les pairs
| Résumé : | The γ-ray strength function and the nuclear level density of Ho167 have been extracted using the Oslo method from a Dy164(α,pγ)Ho167 experiment carried out at the Oslo Cyclotron Laboratory. The level density displays a shape that is compatible with the constant temperature model in the quasicontinuum, while the strength function shows structures indicating the presence of both a scissors resonance and a pygmy dipole resonance. Using our present results as well as data from a previous Dy163(α,pγ)Ho166 experiment, the Ho165(n,γ) and Ho166(n,γ) eellian-averaged cross section (MACS) uncertainties have been constrained. The possible influence of the low-lying, long-lived 6 keV isomer Ho166 in the s process is investigated in the context of a 2M⊙, [Fe/H]=-0.5 asymptotic giant branch star. We show that the newly obtained Ho165(n,γ) MACS affects the final Ho165 abundance, while the Ho166(n,γ) MACS only impacts the enrichment of Er166,167 to a limited degree due to the relatively rapid β decay of the thermalized Ho166 at typical s-process temperatures. |
