High-temperature proportional counter and its application to resonance--electron Moessbauer spectroscopy

Journal Article · Sun Mar 01 04:00:00 EST 1981 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1136595· OSTI ID:6623548

Isozumi, Y; Kurakado, M; Katano, R

The operation of a proportional counter designed for resonance--electron Moessbauer spectroscopy measurement at high temperatures up to 900 /sup 0/C has been investigated. In order to avoid insulation difficulties due to electric leakage on the surfaces of heated insulators, the counter is carefully constructed so that the sensitive volume of the counter can be warmed up while keeping the insulators at room temperature; all insulating materials between the anode and cathodes are located outside the electric furnace in the counter system. The counter operation is influenced by thermal electrons emitted from the cathode material; the maximum working temperature is about 800 /sup 0/C when an ..cap alpha..-Fe foil is mounted as a cathode while operation at 900 /sup 0/C is possible without the sample. /sup 57/Fe Moessbauer spectra for surface layers (approx.1000 A) have been sucessfully obtained for samples of Fe/sub 3/C, Fe/sub 2/O/sub 3/, and ..cap alpha.. Fe. Chemical changes of the sample surfaces have been observed at temperatures greater than 600 /sup 0/C by the measurements. The high-temperature counter provides us with a new method to observe directly surface phenomena at high temperatures. Some features of the counter system are described.

• Research Organization: Radioisotope Research Center and Insititute for Chemical Research, Kyoto University, Kyoto, Japan
• OSTI ID: 6623548
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 52:3; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
DATA
DIMENSIONS
ELECTRIC FURNACES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
ELECTRON EMISSION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
EQUIPMENT
EVEN-ODD NUCLEI
FABRICATION
FERMIONS
FOILS
FURNACES
GAMMA SPECTROMETERS
HEATING
INFORMATION
INTERMEDIATE MASS NUCLEI
IRON
IRON 57
IRON ISOTOPES
ISOTOPES
LEPTONS
MEASURING INSTRUMENTS
MEDIUM TEMPERATURE
METALS
MOESSBAUER EFFECT
MOESSBAUER SPECTROMETERS
NUCLEI
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RESONANCE
SPECTROMETERS
STABLE ISOTOPES
SURFACES
THICKNESS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE