Decay studies of the highly neutron-deficient indium isotopes

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5990334

Wouters, J M

An extension of the experimentally known nuclidic mass surface to nuclei far from the region of ..beta..-stability is of fundamental interest in providing a better determination of the input parameters for the various nuclear mass formulae, allowing a more accurate prediction of the ultimate limits of nuclear stability. In addition, a study of the shape of the mass surface in the vicinity of the double-closed nuclide /sup 100/Sn provides initial information on the behavior of the shell closure to be expected when Z = N = 50. Experiments measuring the decay energies of /sup 103 -105/In by ..beta..-endpoint measurements are described with special attention focused on the development of a plastic scintillator ..beta..-telescope coupled to the on-line mass separator RAMA (Recoil Atom Mass Analyzer). An attempt to measure the ..beta..-endpoint energy of /sup 102/In is also briefly described. The experimentally determined decay energies and derived masses for /sup 103 -105/In are compared with the predictions of different mass models to identify which models are more successful in this region. Furthermore, the inclusion in these comparisons of the available data on the neutron-rich indium nuclei permits a systematic study of their ground state mass behavior as a function of the neutron number between the shell closures at N = 50 and N = 82. These analyses indicate that the binding energy of /sup 103/In is 1 MeV larger than predicted by the majority of the mass models. An examination of the Q/sub EC/ surface and the single- and two-neutron separation energies in the vicinity of /sup 103 -105/In is also performed to investigate further the above deviation and other possible systematic variations in the mass surface in a model-independent way.

• Research Organization: California Univ., Berkeley (USA)
• OSTI ID: 5990334
• Country of Publication: United States
• Language: English

Related Subjects

651722* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Radioactive Decay-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA SPECTRA
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
BINDING ENERGY
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY
ENERGY SPECTRA
INDIUM 103
INDIUM 104
INDIUM 105
INDIUM ISOTOPES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASS DEFECT
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
SPECTRA