Decay studies of the highly neutron-deficient indium isotopes

Technical Report · Mon Feb 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5228672· OSTI ID:5228672

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 doubly-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/ /sup 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/ /sup 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/ /sup 105/In is also performed to investigate further the deviation and other possible systematic variations in the mass surface in a model-independent way.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5228672
• Report Number(s): LBL-13860; ON: DE82008966
• Country of Publication: United States
• Language: English

Related Subjects

651721 -- Nuclear Properties & Reactions
A=90-149
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651722* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
BETA-PLUS DECAY RADIOISOTOPES
BINDING ENERGY
CHARGED-PARTICLE REACTIONS
DATA
DECAY
ELECTRON CAPTURE DECAY
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ENERGY
ENERGY LEVELS
EXPERIMENTAL DATA
FUSION REACTIONS
GROUND STATES
HEAVY ION REACTIONS
INDIUM 102
INDIUM 103
INDIUM 104
INDIUM 105
INDIUM ISOTOPES
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MASS
MASS DEFECT
MEASURING INSTRUMENTS
METALS
MINUTES LIVING RADIOISOTOPES
MOLYBDENUM
MOLYBDENUM 92 TARGET
NEUTRON SEPARATION ENERGY
NEUTRON-DEFICIENT ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PLASTIC SCINTILLATION DETECTORS
RADIATION DETECTORS
RADIOISOTOPES
SCINTILLATION COUNTERS
SECONDS LIVING RADIOISOTOPES
SOLID SCINTILLATION DETECTORS
TARGETS
TELESCOPE COUNTERS
TRANSITION ELEMENTS