Observation of isoscalar multipole strengths in exotic doubly-magic 56Ni in inelastic α 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. Caamaño, L. Càceres, S. Damoy, F. Delaunay, B. Fernández-Domínguez, M. Fujiwara, U. Garg, G. F. Grinyer, O. Kamalou, E. Khan, A. KrasznahorkayG. 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

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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 56Ni. They were measured by inelastic α-particle scattering in inverse kinematics at 50 MeV/u with the MAYA active target at the GANIL facility. The centroid of the ISGMR has been obtained at Ex=19.1±0.5 MeV. Evidence for the low-lying part of the ISGDR has been found at Ex=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 α-particle scattering as a suitable probe for exciting the ISGMR and the ISGDR modes in radioactive isotopes in inverse kinematics.

Original languageEnglish
Pages (from-to)371-375
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume751
DOIs
Publication statusPublished - Dec 17 2015

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Bagchi, S., Gibelin, J., Harakeh, M. N., Kalantar-Nayestanaki, N., Achouri, N. L., Akimune, H., Bastin, B., Boretzky, K., Bouzomita, H., Caamaño, M., Càceres, L., Damoy, S., Delaunay, F., Fernández-Domínguez, B., Fujiwara, M., Garg, U., Grinyer, G. F., Kamalou, O., Khan, E., ... Van de Walle, J. (2015). Observation of isoscalar multipole strengths in exotic doubly-magic 56Ni in inelastic α scattering in inverse kinematics. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 751, 371-375. https://doi.org/10.1016/j.physletb.2015.10.060