Schottky Mass Measurement of the {sup 208}Hg Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly Magic {sup 208}Pb

Journal Article · Fri Mar 27 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.122503· OSTI ID:21180318

Chen, L; Plass, W R; Geissel, H; Scheidenberger, C ^[1]; Litvinov, Yu A; Beckert, K; Beller, P; Bosch, F; Caceres, L; Franzke, B; Gerl, J; Gorska, M; Knoebel, R; Kozhuharov, C; Litvinov, S A; Mandal, S; Muenzenberg, G; Nolden, F; Saito, N; Saito, T ^[1]

---

1. GSI Helmholtzzentrum fuer Schwerionenforschung, Planckstrasse 1, 64291 Darmstadt (Germany)

Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the mass value for the {sup 208}Hg (Z=80, N=128) isotope. The mass excess value of ME=-13 265(31) keV has been obtained, which has been used to determine the proton-neutron interaction strength in {sup 210}Pb, as a double difference of atomic masses. The results show a dramatic variation of the strength for lead isotopes when crossing the N=126 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.

• OSTI ID: 21180318
• Journal Information: Physical Review Letters, Vol. 102, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.102.122503; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
LEAD 208
LEAD 210
MASS SPECTROSCOPY
MERCURY 208
PROTON-NEUTRON INTERACTIONS
PROTONS
TIME RESOLUTION
URANIUM
WAVE FUNCTIONS