SEARCH FOR GAMMA RAYS FOLLOWING THE DECAY OF 3-HOUR Ti$sup 4$$sup 5$

Journal Article · Tue Jan 01 04:00:00 EST 1963 · Current Sci. (India)

OSTI ID:4695545

Ramaswamy, M K

Ti/sup 45/ was produced by bombarding pure Sc/sup 45/ with 6-Mev protons. The single gamma -ray spectrum observed in a 1" x 2" NaI crystal contained only the annihilation radiation. The gamma spectrum coincident with positrons was investigated next employing 2 NaI counters at 90 deg to each other to minimize annihilation radiation coincidences. The coincidence resolving time was 25 nanosec. The coincidence spectrum showed the presence of a gamma ray of 270 plus or minus 10 kev. Since a 90 deg scattering of the annihilation radiation can produce such a gamma ray, a triple coincidence experiment was performed in which gamma rays in coincidence with the 2 annihilation quanta were sought. In the range up to 600 kev no gamma ray was observed. An upper limit of 0.1% (relative to the ground state decay) could be set on any gamma ray produced. The ground state spin of Ti/sup 45/ can be either 3/2, 5/2, or 7/2 with odd parity. An assignment of 7/2 for this and 3/2 for the 377kev level seen in inelastic scattering experiments would explain the absence of any gamma rays following Ti/sup 45/ decay. (TCO)

• Research Organization: Karnatak Univ., Dharwar, India
• NSA Number: NSA-17-028269
• OSTI ID: 4695545
• Journal Information: Current Sci. (India), Journal Name: Current Sci. (India) Vol. Vol: 32
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALUMINUM
ATOMIC MODELS
CERIUM
CERIUM OXIDES
DEFORMATION
DIFFUSION
ELECTRONS
FERMI LEVEL
G-VALUE
LITHIUM
MAGNETIC FIELDS
MEASURED VALUES
METALS
PARTICLE MODELS
PHYSICS
PRESSURE
RADIATION CHEMISTRY
RELAXATION
RESONANCE
SIGNALS
SODIUM
SPIN
STATISTICS
SURFACES
YTTERBIUM