Elsevier

Physics Letters B

Volume 743, 9 April 2015, Pages 451-455
Physics Letters B

Neutron-driven collectivity in light tin isotopes: Proton inelastic scattering from 104Sn

https://doi.org/10.1016/j.physletb.2015.03.018Get rights and content
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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=106112 displayed by E2 transition probabilities is driven by neutron collectivity.

Keywords

Collectivity
Inelastic scattering
Gamma spectroscopy

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