Electron capture and positron decay of /sup 206/Fr and /sup 208/Fr and the energy levels of /sup 206/Rn and /sup 208/Rn

Journal Article · Wed Apr 01 04:00:00 EST 1981 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.23.1717· OSTI ID:6614416

Ritchie, B G; Carter, H K; Mlekodaj, R L; Spejewski, E H

The isotopes /sup 206/Fr and /sup 208/Fr were produced by the reactions Ir(/sup 20/Ne,xn)/sup 206,208/Fr and mass separated on-line. The electron-capture and positron decays to /sup 206/Rn and /sup 208/Rn were studied by collecting ..gamma.. ray and internal conversion electron singles spectra as a function of decay time as well as ..gamma..-..gamma.., ..gamma..-e/sup -/, and ..gamma..-x ray coincidence spectra. The energies and many of the spins were determined for 18 excited, even parity states in /sup 208/Rn and for 10 excited, even parity states in /sup 206/Rn. These nuclei appear to be excellent candidates for interpretation in terms of a weak coupling shell model. The energy levels were also compared to the predictions of the interacting boson approximation model.

• Research Organization: UNISOR, Oak Ridge Associated Universities, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 6614416
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY
CAPTURE
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DECAY
ELECTRON CAPTURE
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ENERGY LEVELS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FRANCIUM 206
FRANCIUM 208
FRANCIUM ISOTOPES
GAMMA SPECTRA
HEAVY ION REACTIONS
HEAVY NUCLEI
INFORMATION
INTERACTING BOSON MODEL
IRIDIUM
ISOCHRONOUS CYCLOTRONS
ISOTOPES
MATHEMATICAL MODELS
METALS
MINUTES LIVING RADIOISOTOPES
NEON 20 REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
PLATINUM METALS
RADIOISOTOPES
RADON 206
RADON 208
RADON ISOTOPES
REFRACTORY METALS
SHELL MODELS
SPECTRA
SPIN
TRANSITION ELEMENTS
WEAK-COUPLING MODEL