• Rapid Communication

Precision mass measurements of Fe67 and Co69,70: Nuclear structure toward N=40 and impact on r-process reaction rates

L. Canete, S. Giraud, A. Kankainen, B. Bastin, F. Nowacki, A. Poves, P. Ascher, T. Eronen, V. Alcindor, A. Jokinen, A. Khanam, I. D. Moore, D. A. Nesterenko, F. De Oliveira Santos, H. Penttilä, C. Petrone, I. Pohjalainen, A. de Roubin, V. A. Rubchenya, M. Vilen, and J. Äystö
Phys. Rev. C 101, 041304(R) – Published 20 April 2020; Erratum Phys. Rev. C 103, 029902 (2021)

Abstract

Accurate mass measurements of neutron-rich iron and cobalt isotopes Fe67 and Co69,70 have been realized with the JYFLTRAP double Penning-trap mass spectrometer. With novel ion-manipulation techniques, the masses of the Co69,70 ground states and the 1/2 isomer in Co69 have been extracted for the first time. The measurements remove ambiguities in the previous mass values and yield a smoother trend on the mass surface, extending it beyond N=40. The moderate N=40 subshell gap has been found to weaken below Ni68, a region known for shape coexistence and increased collectivity. The excitation energy for the 1/2 intruder state in Co69 has been determined for the first time and is compared to large-scale shell-model calculations. The new mass values also reduce significantly mass-related uncertainties for the astrophysical rapid neutron-capture process calculations.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 8 May 2019
  • Revised 6 February 2020
  • Accepted 18 March 2020

DOI:https://doi.org/10.1103/PhysRevC.101.041304

©2020 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Erratum

Erratum: Precision mass measurements of Fe67 and Co69,70: Nuclear structure toward N=40 and impact on r-process reaction rates [Phys. Rev. C 101, 041304(R) (2020)]

L. Canete, S. Giraud, A. Kankainen, B. Bastin, F. Nowacki, A. Poves, P. Ascher, T. Eronen, V. Alcindor, A. Jokinen, A. Khanam, I. D. Moore, D. A. Nesterenko, F. De Oliveira Santos, H. Penttilä, C. Petrone, I. Pohjalainen, A. de Roubin, V. A. Rubchenya, M. Vilen, and J. Äystö
Phys. Rev. C 103, 029902 (2021)

Authors & Affiliations

L. Canete1,*, S. Giraud2,†, A. Kankainen1, B. Bastin2, F. Nowacki3, A. Poves4, P. Ascher5, T. Eronen1, V. Alcindor2, A. Jokinen1, A. Khanam1,‡, I. D. Moore1, D. A. Nesterenko1, F. De Oliveira Santos2, H. Penttilä1, C. Petrone6, I. Pohjalainen1, A. de Roubin1, V. A. Rubchenya1, M. Vilen1, and J. Äystö1

  • 1University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
  • 2Grand Accélérateur National d'Ions Lourds (GANIL), Bd Henri Becquerel, Boîte Postale 55027, F-14076 Caen Cedex 5, France
  • 3Université de Strasbourg, IPHC, 23 rue du Loess 67037 Strasbourg, France
  • 4Departamento de Física Teórica e IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
  • 5Centre d'Études Nucléaires de Bordeaux-Gradignan (CENBG), CNRS/IN2P3, Université de Bordeaux 1, 33175 Gradignan Cedex, France
  • 6Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), P.O. Box MG-6, 077125 Bucharest-Magurele, Romania

  • *Present address: University of Surrey, Guildford GU2 7XH, United Kingdom; l.canete@surrey.ac.uk
  • Present address: National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, East Lansing, Michigan 48824, USA; giraud@frib.msu.edu
  • Present address: Aalto University, P.O. Box 11000, FI-00076 Aalto, Finland.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 4 — April 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×