Schottky Mass Measurement of the Hg-208 Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly Magic Pb-208
Date
2009Author
Williams, S.
KNOEBEL, R.
Kozhuharov, C.
LITVINOV, S. A.
Yamaguchi, T.
Cakirli, Rabia Burcu
Liu, Z.
MANDAL, S.
Montes, F.
MUENZENBERG, G.
Nolden, F.
OHTSUBO, T.
CHEN, L.
LITVINOV, Yu. A.
PLASS, W. R.
BECKERT, K.
BELLER, P.
Bosch, F.
BOUTIN, D.
Caceres, L.
Carroll, J. J.
Casten, R. F.
Chakrawarthy, R. S.
Cullen, D. M.
Cullen, I. J.
FRANZKE, B.
Patyk, Z.
Podolyak, Zs.
Propri, R.
Rigby, S.
SAITO, N.
SAITO, T.
Scheidenberger, C.
SHINDO, M.
Steck, M.
Ugorowski, P.
Walker, P. M.
Weick, H.
WINKLER, M.
WOLLERSHEIM, H. -J.
Geissel, H.
Gerl, J.
Gorska, M.
Jones, G. A.
Kishada, A.
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Show full item recordAbstract
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.
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