DECAY OF I$sup 12$$sup 4$
The gamma and beta rays following the decay of I/sup 124/ which was produced by Sb/sup 124/( alpha ,n) reaction have been studied with scintillation spectrometers both single and in coincidence, and with a beta-ray spectrometer. Three gamma rays at 2.74 Mev, 2.29 Mev, and l.50 Mev and probably 0.9 Mev which were not found in decay of Sb/sup 124/ were observed. The beta-gamma coincidence experiments revealed that the first positron group decays to the ground level of Te/sup 124/ that the energy difference between I/sup 124/ and Te/sup 124/ becomes 3.22 Mev, being consistent with beta decay energy systematics. In addition this beta component was found to have a unique 1st forbidden type spectrum, showing the spin and parity of the ground state of I/sup 124/ is 2-. From these results one is led to conclude the presence of two new levels at 2.88 Mev and 2.74 Mev which the spin value is probably 1 and the parity is negative. A doublet level at the second excited level previously reported was not confirmed in the present experiment. However, a definite evidence of cross-over transition from the second level to the ground level was obtained which may indicate a presence of a 2+ level at the second excited level. The tentative decay scheme is proposed. (auth)
- Research Organization:
- Tohoku Univ., Sendai; Univ. of Tokyo
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-020534
- OSTI ID:
- 4224534
- Journal Information:
- J. Phys. Soc. Japan, Journal Name: J. Phys. Soc. Japan Vol. Vol: 14
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALPHA BEAMS
ANTIMONY 124
BETA DECAY
BETA PARTICLES
BETA SPECTROMETERS
COINCIDENCE METHODS
DECAY
ENERGY
ENERGY LEVELS
EXCITATION
GAMMA RADIATION
GAMMA SPECTROMETERS
IODINE 124
MEASURED VALUES
NEUTRONS
NUCLEAR REACTIONS
NUCLEAR THEORY
PARITY
PHYSICS AND MATHEMATICS
POSITRONS
SCINTILLATION COUNTERS
SPECTRA
SPIN
TELLURIUM 124
TRANSIENTS
ANTIMONY 124
BETA DECAY
BETA PARTICLES
BETA SPECTROMETERS
COINCIDENCE METHODS
DECAY
ENERGY
ENERGY LEVELS
EXCITATION
GAMMA RADIATION
GAMMA SPECTROMETERS
IODINE 124
MEASURED VALUES
NEUTRONS
NUCLEAR REACTIONS
NUCLEAR THEORY
PARITY
PHYSICS AND MATHEMATICS
POSITRONS
SCINTILLATION COUNTERS
SPECTRA
SPIN
TELLURIUM 124
TRANSIENTS