Observation of isoscalar multipole strengths in exotic doubly-magic Ni-56 in inelastic alpha scattering in inverse kinematics
- Bagchi, S.
- Gibelin, J.
- Harakeh, M. N.
- Kalantar-Nayestanaki, N.
- Achouri, N. L.
- Akimune, H.
- Bastin, B.
- Boretzky, K.
- Bouzomita, H.
- Caamano, M.
- Caceres, L.
- Damoy, S.
- Delaunay, F.
- Fernandez-Dominguez, B.
- Fujiwara, M.
- Garg, U.
- Grinyer, G. F.
- Kamalou, O.
- Khan, E.
- Krasznahorkay, A.
- Lhoutellier, G.
- Libin, J. F.
- Lukyanov, S.
- Mazurek, K.
- Najafi, M. A.
- Pancin, J.
- Penionzhkevich, Y.
- Perrot, L.
- Raabe, R.
- Rigollet, C.
- Roger, T.
- Sambi, S.
- Savajols, H.
- Senoville, M.
- Stodel, C.
- Suen, L.
- Thomas, J. C.
- Vandebrouck, M.
- Van de Walle, J.
DOIAbstract
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 ...
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