NEW RADIOACTIVITY 43-MIN YTTRIUM-84
A 43 plus or minus 2-min yttrium activity is observed in a natural strontium target irradiated with 57-Mev protons. The activity is assigned to Y/ sup 84/ by measured the excitation function. The 3.7-hr activity previously assigned to Y/sup 84/ is identified to Y/sup 85/. Gamma transitions of 0.453 Mev (10%), 0.590 Mev (15%), 0.795 Mev (100%, E2), 0.982 Mev (100%, E2), 1.041 Mev (50%, E2 or M1), 1.27 Mev (9%), and 1.47 Mev (6%) are observed in the scintillation and internal conversion spectra of Y/sup 84/. The positron spectrum taken with a beta-ray spectrometer gives maximum energies of 3.50 plus or minus 0.10 and 2.90 plus or minus 0.15 Mev. Gamma-gamma and positron-gamma coincidence measurements are carried out. A tentative decay scheme is proposed that involves the following energy levels in Sr 4: 0.982 or 0.795 Mev and parity of Y/sup 84/ are tentatively assigned as 5--. (auth)
- Research Organization:
- Tokyo Univ.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-031184
- OSTI ID:
- 4765420
- Journal Information:
- J. Phys. Soc. Japan, Journal Name: J. Phys. Soc. Japan Vol. Vol: 17
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
BETA SPECTROMETERS
COINCIDENCE METHODS
CROSS SECTIONS
DECAY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
EXCITATION FUNCTION
GAMMA RADIATION
HALF-LIFE
INTERNAL CONVERSION
MEASURED VALUES
MEV RANGE
PARITY
PHYSICS
POSITRONS
PROTON BEAMS
RADIOACTIVITY
SCINTILLATIONS
SPECTRA
SPIN
STRONTIUM
STRONTIUM 84
TRANSIENTS
YTTRIUM 84
YTTRIUM 85
COINCIDENCE METHODS
CROSS SECTIONS
DECAY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
EXCITATION FUNCTION
GAMMA RADIATION
HALF-LIFE
INTERNAL CONVERSION
MEASURED VALUES
MEV RANGE
PARITY
PHYSICS
POSITRONS
PROTON BEAMS
RADIOACTIVITY
SCINTILLATIONS
SPECTRA
SPIN
STRONTIUM
STRONTIUM 84
TRANSIENTS
YTTRIUM 84
YTTRIUM 85