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 00:00:00 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
• DOE Contract Number: DE-AC05-760R00033; DEAS-0970-ER-10434
• OSTI ID: 6614416
• Journal Information: Phys. Rev., C; (United States), Vol. 23:4
• Country of Publication: United States
• Language: English

Related Subjects

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