Eur. Phys. J. A (2013) 49: 124
https://doi.org/10.1140/epja/i2013-13124-6

Regular Article - Theoretical Physics

The soft Giant Monopole Resonance as a probe of the spin-orbit splitting

¹ Physics Department, Yildiz Technical University, 34210, Esenler, Istanbul, Turkey
² Institut de Physique Nucléaire, Université Paris-Sud, IN2P3-CNRS, F-91406, Orsay Cedex, France

^* e-mail: khan@ipno.in2p3.fr

Received: 19 March 2013
Revised: 3 July 2013
Accepted: 17 September 2013
Published online: 16 October 2013

Abstract

The isoscalar monopole response is studied in doubly magic ²⁰⁸Pb , ^{100, 132}Sn nuclei using the Skyrme HF+RPA model. A low-energy strength is predicted and corresponds to almost pure single-particle excitations. These pure single-particle excitations allow to analyse the splitting of the corresponding spin-orbit partners. A good agreement with the spin-orbit splitting data is found in the case of ²⁰⁸Pb . The experimental width of the giant monopole resonance may hinder the measurement of the soft monopole mode.