Abstract
A systematics of excitation energy of the first 2+ state E21+in even–even heavy nuclei (A⩾120) is studied in the NpNnscheme. It is found that a simple exponential function describes thedependence of E21+ values on NpNn values very well. Inaddition, the Z = 64 shell gap is reexamined by investigating thesystematics of the 52⩽Z⩽66 region. It is found that theZ = 64 shell gap is largest at N = 82 and becomes smaller with eitherincreasing or decreasing of neutron numbers. The effects of this shellgap become negligible for counting the valence proton numbers whenN⩾92 or N⩽72.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
