Observation of isoscalar multipole strengths in exotic doubly-magic $^{56}$Ni 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. Caamano; L. Caceres; S. Damoy; F. Delaunay; B. Fernandez-Domınguez; 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

doi:10.1016/j.physletb.2015.10.060

Observation of isoscalar multipole strengths in exotic doubly-magic $^{56}$Ni in inelastic α scattering in inverse kinematics

S. Bagchi ¹ J. Gibelin ² M.N. Harakeh ¹ N. Kalantar-Nayestanaki ¹ N.L. Achouri ² H. Akimune B. Bastin ³ K. Boretzky H. Bouzomita ³ M. Caamano ⁴ L. Caceres ³ S. Damoy ³ F. Delaunay ² B. Fernandez-Domınguez ⁴ M. Fujiwara U. Garg G.F. Grinyer ³ O. Kamalou ³ E. Khan ⁵ A. Krasznahorkay ⁶ G. Lhoutellier ² J.F. Libin ³ S. Lukyanov ⁷ K. Mazurek M.A. Najafi J. Pancin ³ Y. Penionzhkevich ⁷ L. Perrot ⁵ R. Raabe ⁸ C. Rigollet ¹ T. Roger ³ S. Sambi ⁸ H. Savajols ³ M. Senoville ² C. Stodel ³ L. Suen J.C. Thomas ³ M. Vandebrouck ^{2, 3, 5} J. van De Walle ⁸

1 KVI-CART, University of Groningen

2 LPCC - Laboratoire de physique corpusculaire de Caen

3 GANIL - Grand Accélérateur National d'Ions Lourds

4 Universidade de Santiago de Compostela

5 IPNO - Institut de Physique Nucléaire d'Orsay

6 Institute of Nuclear Research ( ATOMKI )

7 Flerov Laboratory of Nuclear Reactions

8 IKS - Instituut voor Kern-en Stralingsfysica

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 $^{56}$Ni. 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.

Type de document :

Article dans une revue

Physics Letters B, Elsevier, 2015, 751, pp.371-375. 〈10.1016/j.physletb.2015.10.060〉

Domaine :

Physique [physics] / Physique Nucléaire Expérimentale [nucl-ex]

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Soumis le : jeudi 20 octobre 2016 - 14:05:35
Dernière modification le : jeudi 12 avril 2018 - 10:52:26

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Observation of isoscalar multipole strengths in exotic doubly-magic $^{56}$Ni in inelastic α scattering in inverse kinematics

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Observation of isoscalar multipole strengths in exotic doubly-magic $^{56}$Ni in inelastic α scattering in inverse kinematics

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