Measurement of the Isoscalar Monopole Response in the Neutron-Rich Nucleus Ni68

M. Vandebrouck et al.
Phys. Rev. Lett. 113, 032504 – Published 16 July 2014; Erratum Phys. Rev. Lett. 113, 059902 (2014)

Abstract

The isoscalar monopole response has been measured in the unstable nucleus Ni68 using inelastic alpha scattering at 50A  MeV in inverse kinematics with the active target MAYA at GANIL. The isoscalar giant monopole resonance (ISGMR) centroid was determined to be 21.1±1.9  MeV and indications for a soft monopole mode are provided for the first time at 12.9±1.0  MeV. Analysis of the corresponding angular distributions using distorted-wave-born approximation with random-phase approximation transition densities indicates that the L=0 multipolarity dominates the cross section for the ISGMR and significantly contributes to the low-energy mode. The L=0 part of this low-energy mode, the soft monopole mode, is dominated by neutron excitations. This demonstrates the relevance of inelastic alpha scattering in inverse kinematics in order to probe both the ISGMR and isoscalar soft modes in neutron-rich nuclei.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 12 March 2014
  • Publisher error corrected 18 July 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.032504

© 2014 American Physical Society

Corrections

18 July 2014

Erratum

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 113, Iss. 3 — 18 July 2014

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 Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×