The 77Se(n, & gamma;) reaction is of importance for 77Se abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the 77Se radiative neutron capture cross section at the Neutron Time-of-Flight facility at CERN. Resonance capture kernels were derived up to 51 keV and cross sections up to 200 keV. Maxwellian-averaged cross sections were calculated for stellar temperatures between kT = 5 keV and kT = 100 keV, with uncertainties between 4.2% and 5.7%. Our results lead to substantial decreases of 14% and 19% in 77Se abundances produced through the slow neutron capture process in selected stellar models of 15M0 and 2M0, respectively, compared to using previous recommendation of the cross section.

Sosnin, N.V., Lederer-Woods, C., Krtička, M., Garg, R., Dietz, M., Bacak, M., et al. (2023). Measurement of the Se77(n,γ) cross section up to 200 keV at the n_TOF facility at CERN. PHYSICAL REVIEW C, 107(6), 1-9 [10.1103/physrevc.107.065805].

Measurement of the Se77(n,γ) cross section up to 200 keV at the n_TOF facility at CERN

Mingrone, F.;Manna, A.;Massimi, C.
Writing – Review & Editing
;
Vannini, G.;
2023

Abstract

The 77Se(n, & gamma;) reaction is of importance for 77Se abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the 77Se radiative neutron capture cross section at the Neutron Time-of-Flight facility at CERN. Resonance capture kernels were derived up to 51 keV and cross sections up to 200 keV. Maxwellian-averaged cross sections were calculated for stellar temperatures between kT = 5 keV and kT = 100 keV, with uncertainties between 4.2% and 5.7%. Our results lead to substantial decreases of 14% and 19% in 77Se abundances produced through the slow neutron capture process in selected stellar models of 15M0 and 2M0, respectively, compared to using previous recommendation of the cross section.
2023
Sosnin, N.V., Lederer-Woods, C., Krtička, M., Garg, R., Dietz, M., Bacak, M., et al. (2023). Measurement of the Se77(n,γ) cross section up to 200 keV at the n_TOF facility at CERN. PHYSICAL REVIEW C, 107(6), 1-9 [10.1103/physrevc.107.065805].
Sosnin, N. V.; Lederer-Woods, C.; Krtička, M.; Garg, R.; Dietz, M.; Bacak, M.; Barbagallo, M.; Battino, U.; Cristallo, S.; Damone, L. A.; Diakaki, M.;...espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevC.107.065805.pdf

accesso aperto

Tipo: Versione (PDF) editoriale
Licenza: Licenza per Accesso Aperto. Creative Commons Attribuzione (CCBY)
Dimensione 698.91 kB
Formato Adobe PDF
698.91 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/961164
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact