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Neutron-driven collectivity in light tin isotopes: Proton inelastic scattering from $^{104}$Sn

Abstract : Inelastic scattering cross sections to individual bound excited states of 104Sn were measured at 150 MeV/u beam energy and analyzed to evaluate the contribution of neutron and proton collectivity. State-of-the-art Quasi-Particle Random Phase Approximation (QRPA) with the D1M Gogny interaction reproduces the experimental proton collectivity and our inelastic scattering cross sections once used as input for a reaction calculation together with the Jeukenne–Lejeune–Mahaux (JLM) potentials. Experimental inelastic scattering cross section decreases by 40(24)% from 112Sn to 104Sn. The present work shows that (i) proton and neutron collectivities are proportional over a large range of tin isotopes (including 104Sn), as is typical for isoscalar excitations, and (ii) the neutron collectivity dominates. It suggests that the plateau in the mass range A=106–112A=106–112 displayed by E2 transition probabilities is driven by neutron collectivity.
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http://hal.in2p3.fr/in2p3-01131781
Contributor : Michel Lion <>
Submitted on : Monday, March 16, 2015 - 9:20:32 AM
Last modification on : Monday, February 10, 2020 - 6:13:12 PM

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A. Corsi, S. Boissinot, A. Obertelli, P. Doornenbal, M. Dupuis, et al.. Neutron-driven collectivity in light tin isotopes: Proton inelastic scattering from $^{104}$Sn. Physics Letters B, Elsevier, 2015, 743, pp.451-455. ⟨10.1016/j.physletb.2015.03.018⟩. ⟨in2p3-01131781⟩

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