First Results on the Excited States in $^{77}$Cu

Abstract

International audienceThe level structure of the 77Cu nucleus has been studied by means of β-delayed γ-ray spectroscopy at RIKEN Nishina Center. Secondary beam particles in the region near 78Ni were produced via in-flight fission of 238U on a thick 9Be target at a primary beam energy of 345 MeV/nucleon. After identification in atomic number (Z) and mass-to-charge ratio (A∕Q) in the BigRIPS fragment separator, the fission products were delivered to the final focal plane through the ZeroDegree Spectrometer. The WAS3ABI silicon stack array was used for the implantation of the ions, while de-excitation γ rays were detected with the EURICA γ-ray spectrometer at the focal plane. Beta-correlated particle identification of 77Ni allowed to obtain the γ-ray spectrum of the daughter 77Cu in a selective way. Experimental details and first results on the excited states in 77Cu nucleus will be presented in this contribution