$gamma$-RADIATION SPECTRA OF RADIOACTIVE ORES IN THEIR NATURAL DEPOSITS OBTAINED BY MEANS OF PROPORTIONAL COUNTERS

Journal Article · Wed May 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4650748

Kolesov, B M; Lyubavin, Yu P; Ovchinnikov, A K

In view of the relatively poor resolution of scintillation counters with respect to gamma quanta with energies below the 100-kev level, the soft portion of the spectrum was investigated with high-resolution proportional counters. A singlechannel spectrometer was used; its gamma detector consisted of a 200-mm high and 34-mm diameter chamber filled with Xe under a pressure of 2 atm. A steel cylinder served as cathode with a W wire as the collector electrode. The system had a resolution of 12% for the 32-kev gamma quanta. Ore samples of 80 kg were used for the measurements. The spectrum presented a continuous distribution with a weak maximum between 25 to 30 kev. The continuous spectrum is due to the multiple scattering of the gamma quanta within the ore deposit. Scintillation counters indicated a maximum in the 80 to 100 kev range; the difference is due to the different spectral characteristics of the counters. The proportional counter was found to be more sensitive with respect to changes in the Z/sub effect/, than the scintillation counter and is therefore suitable for use in gamma logging and drilling under field conditions. It was found that the gamma spectra of Th and U ores with identical Z/sub effect/, are not markedly different in the range below 100 kev. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-034120
• OSTI ID: 4650748
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 14
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ANODES
CATHODES
CONFIGURATION
CYLINDERS
ENERGY
ENERGY RANGE
GAMMA DETECTION
GAMMA RADIATION
GAMMA SPECTROMETERS
GEOLOGY, MINERALOGY, AND METEOROLOGY
INERT GASES
PROPORTIONAL COUNTERS
RESOLUTION
SCATTERING
SCINTILLATION COUNTERS
SENSITIVITY
SPECTRA
STEELS
THORIUM ORES
TUNGSTEN
URANIUM ORES
USES
WELL LOGGING
WIRES
XENON