Excited states in Xe137 have been studied by using the near-barrier single-neutron transfer reactions C13(Xe136,C12γ)Xe137 and Be9(Xe136,Be8γ)Xe137 in inverse kinematics. Particle-γ and particle-γγ coincidence measurements have been performed with the Phoswich Wall and Digital Gammasphere detector arrays. Evidence is found for a 13/22+ level (E=3137keV) and for additional high-lying 3/2- and 5/2- states. The results are discussed in the framework of realistic shell-model calculations. These calculations are also extended to the 13/21+ and 13/22+ levels in the N=83 isotonic chain. They indicate that there is a need for a value of the neutron 0i13/2 single-particle energy (ESPE=2366keV) lower than the one proposed in the literature. It is also demonstrated that the population patterns of the j=±1/2 single-particle states in Xe137 are different for the two targets used in these measurements and the implications of this effect are addressed.
One-neutron transfer study of Xe 137 and systematics of 13/ 21+ and 13/ 22+ levels in N=83 nuclei / W. Reviol, D.G. Sarantites, J.M. Elson, J.E. Kinnison, A. Gargano, S. Bottoni, R.V.F. Janssens, J.M. Allmond, A.D. Ayangeakaa, M.P. Carpenter, H.M. David, A. Galindo-Uribarri, N. Itaco, T. Lauritsen, E. Padilla-Rodal, S. Zhu. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 94:3(2016 Sep 08). [10.1103/PhysRevC.94.034309]
One-neutron transfer study of Xe 137 and systematics of 13/ 21+ and 13/ 22+ levels in N=83 nuclei
S. Bottoni;
2016
Abstract
Excited states in Xe137 have been studied by using the near-barrier single-neutron transfer reactions C13(Xe136,C12γ)Xe137 and Be9(Xe136,Be8γ)Xe137 in inverse kinematics. Particle-γ and particle-γγ coincidence measurements have been performed with the Phoswich Wall and Digital Gammasphere detector arrays. Evidence is found for a 13/22+ level (E=3137keV) and for additional high-lying 3/2- and 5/2- states. The results are discussed in the framework of realistic shell-model calculations. These calculations are also extended to the 13/21+ and 13/22+ levels in the N=83 isotonic chain. They indicate that there is a need for a value of the neutron 0i13/2 single-particle energy (ESPE=2366keV) lower than the one proposed in the literature. It is also demonstrated that the population patterns of the j=±1/2 single-particle states in Xe137 are different for the two targets used in these measurements and the implications of this effect are addressed.
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