Eur. Phys. J. A (2018) 54: 84
https://doi.org/10.1140/epja/i2018-12518-2

Regular Article - Experimental Physics

High spin states in ⁶³Cu

¹ Department of Physics, Siksha-Bhavana, Visva-Bharati, 731235, Santiniketan, Bolpur, India
² Department of Physics, Salesian College, Siliguri Campus, 734001, Siliguri, India
³ Department of Physics, Institute of Science, Banaras Hindu University, 221005, Varanasi, India
⁴ Variable Energy Cyclotron Centre, 1/AF Bidhannagar, 700064, Kolkata, India
⁵ Inter University Accelerator Centre, Aruna Asaf Ali Marg, 110067, New Delhi, India

^* e-mail: buddhadev.mukherjee@visva-bharati.ac.in

Received: 4 February 2018
Accepted: 24 April 2018
Published online: 24 May 2018

Abstract

High-spin states in ⁶³Cu were investigated through in-beam -ray spectroscopic techniques using the ⁵²Cr(¹⁸O, p2n) fusion-evaporation reaction at a beam energy of 72.5 MeV. The -rays emitted by the excited nucleus were recorded in the coincidence mode using fourteen Compton suppressed Ge clover detectors of the Indian National Gamma-ray Array (INGA). Based on the - coincidence data, twenty-one new -ray transitions have been observed and placed --thereby extending the level scheme of ⁶³Cu up to spin and excitation energy MeV. Shell model calculations are performed in the model space with a ⁵⁶Ni core using two effective interactions, viz. JUN45 and jj44b to interpret the observed excited states of this nucleus. A reasonable agreement is found between the experimental finding and the shell-model calculations --which implies that the excitations within the orbitals are more dominant in defining the observed level structure than the excitation across the magic shell gap .