Precision Mass Measurements of Cd129-131 and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

Atanasov D., Ascher P., Blaum K., Cakirli R. B., Cocolios T. E., George S., ...Daha Fazla

PHYSICAL REVIEW LETTERS, cilt.115, sa.23, 2015 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 115 Sayı: 23
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1103/physrevlett.115.232501
  • Dergi Adı: PHYSICAL REVIEW LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • İstanbul Üniversitesi Adresli: Evet

Özet

Masses adjacent to the classical waiting-point nuclide Cd-130 have been measured by using the Penningtrap spectrometer ISOLTRAP at ISOLDE/CERN. We find a significant deviation of over 400 keV from earlier values evaluated by using nuclear beta-decay data. The new measurements show the reduction of the N = 82 shell gap below the doubly magic Sn-132. The nucleosynthesis associated with the ejected wind from type-II supernovae as well as from compact object binary mergers is studied, by using state-of-the-art hydrodynamic simulations. We find a consistent and direct impact of the newly measured masses on the calculated abundances in the A = 128-132 region and a reduction of the uncertainties from the precision mass input data.