From Q-value measurements to mass and structure of proton-rich nuclei in the tin region

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6042973

Grant, I S; Kirchner, R; Klepper, O; Koslowsky, V T; Larsson, P O; Nolte, E; Nyman, G; Plochocki, A; Rathke, G E; Roeckl, E

For testing shell model predictions of very neutron-deficient nuclei it is important to study the doubly magic nucleus, /sup 100//sub 50/Sn/sub 50/, and its closest neighbors. This paper presents the results of recent experiments which studied the magic nuclei: Z = 50 isotopes and N = 50 isotones; in the vicinity of this doubly magic nucleus. This is a continuation of earlier nuclear-spectroscopy studies carried out at GSI and in Munich. For the lightest nuclei in this region, the experiments concentrated on determining the basic decay properties such as the determination of the decay energies Q and half-lives. The data on Q values can be combined with those from other studies to yield masses of nuclides far from stability. For example, the identification and preliminary study of the new isotope /sup 104/Sn has allowed the masses of nuclei beyond the proton-drip line to be estimated. Nuclear-structure information is derived from both the mass difference data (the Z = 50 proton-shell strength) and from the analysis of fast Gamow-Teller ..beta..-transitions. The experiments were performed using /sup 40/Ca, /sup 58/Ni, and /sup 16/O beams with the energy of approx. = 4, 5 and 9 MeV/u, respectively, obtained from the heavy-ion accelerator UNILAC. The reaction products were investigated with the GSI on-line mass separator. 23 references. (WHK)

• Research Organization: Louisiana State Univ., Baton Rouge (USA); Gesellschaft fuer Schwerionenforschung m.b.H., Darmstadt (Germany, F.R.); Goeteborg Univ. (Sweden); Goettingen Univ. (Germany, F.R.); Lund Inst. of Tech. (Sweden). Dept. of Mathematical Physics
• DOE Contract Number: FG05-84ER40159
• OSTI ID: 6042973
• Report Number(s): DOE/ER/40159-86; CONF-8409143-9; ON: DE85006696
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CADMIUM 98
CADMIUM ISOTOPES
CALCIUM 40 REACTIONS
CHARGED-PARTICLE REACTIONS
DATA
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
ENERGY LEVELS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FT VALUE
FUSION REACTIONS
GAMMA SPECTRA
HALF-LIFE
HEAVY ION REACTIONS
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTONIC NUCLEI
ISOTOPES
MASS
MASS DEFECT
MINUTES LIVING RADIOISOTOPES
NEUTRON-DEFICIENT ISOTOPES
NICKEL 58 REACTIONS
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
OXYGEN 16 REACTIONS
PALLADIUM 96
PALLADIUM ISOTOPES
Q-VALUE
RADIOISOTOPES
RHODIUM 96
RHODIUM ISOTOPES
RUTHENIUM 94
RUTHENIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
TELLURIUM 111
TELLURIUM ISOTOPES
THEORETICAL DATA
TIN 100
TIN 102
TIN 104
TIN 106
TIN 108
TIN ISOTOPES