131Sn decay

Abstract

A level scheme for 131Sb is proposed taking into account the gamma-ray energy and intensity and the gamma-gamma coincidences obtained in the decay of 131Sn. The samples were obtained using on-line mass-separation techniques applied to 235U thermal-neutron fission products. The half-life of 131Sn was measured to be 61 ±1 s. The level structure in 131Sb is compared with a particle-core coupling calculation using a quadrupole proton-neutron interaction.