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

CHEN, L.; LITVINOV, Yu.; PLASS, W.; BECKERT, K.; BELLER, P.; Bosch, F.; BOUTIN, D.; Caceres, L.; Cakirli, Rabia; Carroll, J.; Casten, R.; Chakrawarthy, R.; Cullen, D.; Cullen, I.; FRANZKE, B.; Geissel, H.; Gerl, J.; Gorska, M.; Jones, G.; Kishada, A.; KNOEBEL, R.; Kozhuharov, C.; LITVINOV, S.; Liu, Z.; MANDAL, S.; Montes, F.; MUENZENBERG, G.; Nolden, F.; OHTSUBO, T.; Patyk, Z.; Podolyak, Zs.; Propri, R.; Rigby, S.; SAITO, N.; SAITO, T.; Scheidenberger, C.; SHINDO, M.; Steck, M.; Ugorowski, P.; Walker, P.; Williams, S.; Weick, H.; WINKLER, M.; WOLLERSHEIM, H.; Yamaguchi, T.

doi:10.1103/physrevlett.102.122503

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

CHEN L., LITVINOV Y. A., PLASS W. R., BECKERT K., BELLER P., Bosch F., ...More

PHYSICAL REVIEW LETTERS, vol.102, no.12, 2009 (SCI-Expanded, Scopus)

Publication Type: Article / Article
Volume: 102 Issue: 12
Publication Date: 2009
Doi Number: 10.1103/physrevlett.102.122503
Journal Name: PHYSICAL REVIEW LETTERS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Istanbul University Affiliated: Yes

Abstract

Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the mass value for the Hg-208 (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 Pb-210, 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.