The empirical residual proton-neutron interaction and the onset of collectivity in nuclei

Abstract

DISCLAIMERThis report was prepared as an account of work sponsored by an agency of the United States Gover-icni. Neither the United States Government nor any agency thereof, nor any of their empljy . a , ->akes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. MASTER DISTRIBUTION OF THIS OOCWflHJT IS UNLIMITED THE EMPIRICAL RESIDUAL PROTON-NEUTRON INTERACTION AND THE ONSET OF COLLECTIVITY IN NUCLEIRichard F. Casten Brookhaven National Laboratory, Upton, New York, 11973, USA ABSTRACTThe critical role of the residual valence p-n interaction in the development and evolution of collectivity, and the onset of shape/phase transitions, is discussed from the standpoint of phenomenological approaches, the empirical extraction of individual p-n interaction strengths, and simple model calculations of them.