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  • Measurement of temperature and temperature gradient in millimeter samples by chlorine NQR
    Lužnik, Janko, 1948-2012 ; Pirnat, Janez, 1948- ; Trontelj, Zvonko, 1937-2024
    A mini-thermometer based on the ▫$^{35}Cl$▫ nuclear quadrupole resonance (NQR) frequency temperature dependence in the chlorates KClO▫$_3$▫ and NaClO▫$_3$▫ was built and successfully tested by ... measuring temperature and temperature gradient at 77 K and higher in about 100 mm▫$^3$▫ active volume of a mini Joule-Thomson refrigerator. In the design of the tank-circuit coil, an array of small coils connected in series enabled us (a) to achieve a suitable ratio of inductance to capacity in the NQR spectrometer input tank circuit, (b) to use a single crystal of KClO▫$_3$▫ or NaClO▫$_3$▫ (of 1-2 mm▫$^3$▫ size) in one coil as a mini-thermometer with a resolution of 0.03 K and (c) to construct a system for measuring temperature gradients when the spatial coordinates of each chlorate single crystal within an individual coil are known.
    Vir: Applied physics. A, Materials science & processing. - ISSN 0947-8396 (Vol. 96, no. 4, 2009, str. 1023-1026)
    Vrsta gradiva - članek, sestavni del
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 15213657

    Povezava(-e):

    http://dx.doi.org/10.1007/s00339-009-5137-y

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