Measurement of the Isoscalar Monopole Response in the Neutron-Rich Nucleus $^{68}$Ni using the active target MAYA

Abstract : We report the measurement of the isoscalar monopole strength in the unstable nucleus $^{68}$Ni using inelastic alpha scattering at 50AMeV in inverse kinematics. This experiment has been performed at GANIL with LISE spectrometer using a dedicated detector: the active target MAYA. A part of the isoscalar giant monopole resonance (ISGMR) has been measured at 21:1 $\pm$ 1:9MeV and indications for a soft monopole mode are provided for the first time at 12:9 $\pm$ 1:0MeV. Distorted-wave born ap- proximation (DWBA) with random-phase approximation (RPA) transition densities have been used to study angular distribution and indicate that the L = 0 multipolarity dominates the cross-section for the ISGMR, and significantly contributes to the soft mode.
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http://hal.in2p3.fr/in2p3-01196659
Contributor : Michel Lion <>
Submitted on : Thursday, September 10, 2015 - 11:34:43 AM
Last modification on : Tuesday, February 19, 2019 - 10:00:04 AM

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M. Vandebrouck, J. Gibelin, E. Khan, N.L. Achouri, H. Baba, et al.. Measurement of the Isoscalar Monopole Response in the Neutron-Rich Nucleus $^{68}$Ni using the active target MAYA. ARIS 2014 - Advances in Radioactive Isotope Science, Jun 2014, Tokyo, Japan. pp.020016, ⟨10.7566/JPSCP.6.020016⟩. ⟨in2p3-01196659⟩

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