SCATTERING BY NUCLEAR FLUORESCENCE OF THE $gamma$ RADIATION OF Se$sup 75$. PERIODS OF THE 265-kev AND 402-kev LEVELS OF As$sup 7$$sup 5$

Journal Article · Wed Oct 01 04:00:00 EDT 1958 · Journal de Physique et le Radium (France) Changed to J. Phys. (Orsay, Fr.)

OSTI ID:4272623

Langevin-Joliot, H; Langevin, M

Nuclear resonance fluorescence from the 265 kev excited state of A/sup 75/to a value of (2.3 plus or minus 0,3) x 10/sup -11/ for the half life of this level. No resonance fluorescence from the 402 kev level was observed and the half life of this level is therefore greater than 1.4 x 10/sup -11/sec. The variation of nuclear resonance intensity from the 265 kev level with the pressure of the gaseous source gives the value (1.5 plus or minus 0,4) x 10-/sup -9/ sec for the half life of the 402 kev level. Electron capture branching ratios were reexamined and a weak (0.04%) new transition leads to the 575 kev level of As/sup 75/. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-13-003298
• OSTI ID: 4272623
• Journal Information: Journal de Physique et le Radium (France) Changed to J. Phys. (Orsay, Fr.), Journal Name: Journal de Physique et le Radium (France) Changed to J. Phys. (Orsay, Fr.) Vol. Vol: 19; ISSN JPAAA
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ARSENIC 75
BRANCHING RATIO
CAPTURE
DECAY
ELECTRONS
ENERGY LEVELS
EXCITATION
FLUORESCENCE
GAMMA RADIATION
GAMMA SOURCES
GASES
HALF-LIFE
MEASURED VALUES
NUCLEAR REACTIONS
PHYSICS AND MATHEMATICS
PRESSURE
SCATTERING
SELENIUM 75
TRANSIENTS
VARIATIONS