Abstract
Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the mass value for the (, ) isotope. The mass excess value of has been obtained, which has been used to determine the proton-neutron interaction strength in , as a double difference of atomic masses. The results show a dramatic variation of the strength for lead isotopes when crossing the neutron shell closure, thus confirming the empirical predictions that this interaction strength is sensitive to the overlap of the wave functions of the last valence neutrons and protons.
- Received 23 November 2008
- Corrected 31 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.102.122503
©2009 American Physical Society
Corrections
31 March 2009
Erratum
Publisher’s Note: Schottky Mass Measurement of the Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly Magic [Phys. Rev. Lett. 102, 122503 (2009)]
L. Chen et al.
Phys. Rev. Lett. 102, 139904 (2009)
Synopsis
Nucleon attractions
Published 30 March 2009
High-precision mass measurements of an isotope of mercury will help us to understand the forces between nucleons in nuclei.
See more in Physics