Experimental study of low-lying levels and decay structure in the nucleus 62Cu

Abstract

Abstract The reaction 62 Ni(p, nγ) 62 Cu has been used to investigate the low-lying levels of 62 Cu and their γ-decay. Gamma-ray angular distributions were carried out using incident proton energies close to threshold for the states under investigation and comparison of these results were made with the predictions of the compound nucleus statistical model. In addition to levels seen in the β + /EC decay of 62 Zn, namely the ground state (1 + ), 40.84 keV (2 + ), 243.43 keV (2 + ), 287.86 keV (2 + ), 548.25 keV (1 + ) and 637.20 (1 + ), other levels were found at 389.9 keV, 426.1 keV, 644.9 keV, 675.1 keV, 698.3 keV, 727.5 keV, 756.3 keV and 915.5 keV. The 426.1 keV, 675.1 keV and 727.5 keV states are assigned to be 3 + , 3 + and 2 (+) respectively, and possible spin values for the remaining levels are advanced. Gamma-ray branching ratios were obtained, and a decay scheme for 62 Cu comprising 30 transitions is presented.