Single-Neutron States in 101Sn

Astronomy and Astrophysics – Astrophysics

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X- And Gamma-Ray Spectroscopy, Shell Model, Single-Particle Levels And Strength Functions

Scientific paper

A search for γ-ray transitions in 101Sn, which contains only one neutron outside the 100Sn core, was carried out at the Argonne Tandem-Linac Accelerator System. 101Sn nuclei were produced using the 46Ti(58Ni,3n)101Sn reaction. In-beam γ rays were detected in the Gammasphere Ge-detector array and were correlated with 101Sn β-delayed protons using the Recoil-Decay Tagging method. A γ-ray line at 172 keV was assigned to 101Sn and was interpreted as the transition between the single-neutron g7/2 and d5/2 states. The measured νg7/2-ν d5/2 energy splitting is compared with predictions of various mean-field potentials. It is also used to calculate multi-neutron configurations in light Sn isotopes. Prospects of using β-delayed protons for tagging other exotic nuclei in the 100Sn region are discussed.

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