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Experiments with powdered CMN thermometers between 10 mK and 4K, and a comparison with an NBS SRM 768 fixed-point device

Conference ·
OSTI ID:5307816
; ; ;
Comparison of a powdered CMN thermometer with an NBS fixed point device demonstrates an internal inconsistency in the T/sub c/'s assigned to the fixed point device. T/sub c/'s between 100 and 200 mK are in excellent agreement with a temperature scale interpolated between He vapor pressure temperatures and nuclear orientation temperatures, but there is a discrepancy of 8% at the 15 mK point. Evidence for different susceptibility-temperature relations for superficially similar CMN thermometers is also presented.
Research Organization:
Lawrence Berkeley Lab., CA (USA)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
5307816
Report Number(s):
LBL-13790; CONF-810809-20; ON: DE82007861
Country of Publication:
United States
Language:
English

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Related Subjects

440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
ALKALINE EARTH METALS
ALLOYS
ALUMINIUM ALLOYS
BERYLLIUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALIBRATION
CALIBRATION STANDARDS
COBALT 60
COBALT ISOTOPES
CURIE POINT
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUIDS
FLUXMETERS
GASES
GOLD ALLOYS
HELIUM
INDIUM ALLOYS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IRIDIUM
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MEASURING INSTRUMENTS
METALS
MICROWAVE EQUIPMENT
MINUTES LIVING RADIOISOTOPES
NONMETALS
NUCLEI
ODD-ODD NUCLEI
ORIENTATION
PHYSICAL PROPERTIES
PLATINUM METALS
RADIOISOTOPES
RARE GASES
SQUID DEVICES
STANDARDS
SUPERCONDUCTING DEVICES
THERMODYNAMIC PROPERTIES
THERMOMETERS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
TUNGSTEN
ULTRALOW TEMPERATURE
YEARS LIVING RADIOISOTOPES