Low-lying states in112In

Abstract

Low-lying states below 500keV excitation in 112In have been investigated via the 112Cd(p, nT) reaction. New levels have been established at Ex=206.5 keV and 456.1 keV from the measured y-ray excitation functions, 7-7 coincidences and the precision measurements of the (p, n) threshold energy of the ground state and of the 206.5 keV state of ~12In. Spins and parities of the 206.5 keV state (2 +) and the 456.1 keV state (3 +) and multipolarities and mixing ratios of the deexcitation y-rays have been determined from the angular distributions and linear polarizations of the deexcitation g-rays as well as the excitation functions of the residual levels. Possible configurations of the newly-found levels are discussed. Half-lives of two states have been remeasured: T~= 15.2+0.1 min for the ground state and ~=20.9 -+0.1 min for the 156.4 keV (4 +) state. The ground state Qvalue for the 112Cd(p ' n)112in reaction has been measured to be -3.376-+ 0.006 MeV.