Observation of isoscalar multipole strengths in exotic doubly-magic Ni-56 in inelastic alpha scattering in inverse kinematics

  • S. Bagchi*
  • , J. Gibelin
  • , M. N. Harakeh
  • , N. Kalantar-Nayestanaki
  • , N. L. Achouri
  • , H. Akimune
  • , B. Bastin
  • , K. Boretzky
  • , H. Bouzomita
  • , M. Caamano
  • , L. Caceres
  • , S. Damoy
  • , F. Delaunay
  • , B. Fernandez-Dominguez
  • , M. Fujiwara
  • , U. Garg
  • , G. F. Grinyer
  • , O. Kamalou
  • , E. Khan
  • , A. Krasznahorkay
  • G. Lhoutellier, J. F. Libin, S. Lukyanov, K. Mazurek, M. A. Najafi, J. Pancin, Y. Penionzhkevich, L. Perrot, R. Raabe, C. Rigollet, T. Roger, S. Sambi, H. Savajols, M. Senoville, C. Stodel, L. Suen, J. C. Thomas, M. Vandebrouck, J. Van de Walle
*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    23 Citations (Scopus)
    251 Downloads (Pure)

    Abstract

    The Isoscalar Giant Monopole Resonance (ISGMR) and the Isoscalar Giant Dipole Resonance (ISGDR) compression modes have been studied in the doubly-magic unstable nucleus Ni-56. They were measured by inelastic alpha-particle scattering in inverse kinematics at 50MeV/u with the MAYA active target at the GANIL facility. The centroid of the ISGMR has been obtained at E-x= 19.1 +/- 0.5 MeV. Evidence for the low-lying part of the ISGDR has been found at E-x = 17.4 +/- 0.7 MeV. The strength distribution for the dipole mode shows similarity with the prediction from the Hartree-Fock (HF) based random-phase approximation (RPA)[1]. These measurements confirm inelastic a-particle scattering as a suitable probe for exciting the ISGMR and the ISGDR modes in radioactive isotopes in inverse kinematics. (C) 2015 The Authors. Published by Elsevier B.V.

    Original languageEnglish
    Pages (from-to)371-375
    Number of pages5
    JournalPhysics Letters B
    Volume751
    DOIs
    Publication statusPublished - 17-Dec-2015

    Keywords

    • NUCLEAR INCOMPRESSIBILITY
    • DIPOLE RESONANCE
    • ACTIVE TARGET
    • ENERGY
    • ISOTOPES
    • MATTER
    • BEAMS

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