Boots – shoes – and leggings
Patent
1985-02-27
1988-12-13
Krass, Errol A.
Boots, shoes, and leggings
374159, 356 43, G01J 500, G01K 1100
Patent
active
047915854
ABSTRACT:
A cryogenic thermometer using molecular luminescence determines temperature. A sensor material is used which is capable of emitting radiant energy from a spin multiplet when excited, the excited state being characterized by a large zero field splitting (ZFS), and in which two of the sublevels split by the ZFS are radiative in the visible or near infrared region and are optically resolvable from each other. Spin-lattice relaxation rates between the sublevels are much larger than the sublevel decay rates to other states in order that their populations remain close to thermal equilibrium during optical pumping. The relative intensity of the two bands of radiation is determined and the temperature calculated therefrom. Xanthione (XS) dissolved in n-hexane may be used as a sensor material in the optimum range of 3 to 10K, with estimated precision varying between 0.4 mK and 3.0 mK within this range. Other disclosed sensor materials should allow extension of the optimal range to about 20K on the high end and somewhat below 2K on the low end.
REFERENCES:
patent: 4057349 (1977-11-01), Barrett
patent: 4075493 (1978-02-01), Wickersheim
patent: 4215275 (1980-07-01), Wickersheim
patent: 4340405 (1982-06-01), Steyert, Jr. et al.
patent: 4437772 (1984-03-01), Samulski
patent: 4448547 (1984-05-01), Wickersheim
patent: 4560286 (1985-12-01), Wickersheim
Chemical Physics, 32 (1978) 369-380, "Optically Detected Magnetic Resonance Study of the Lowest Excited Triplet State of Aromatic Thioketones: Xanthione", August H. Maki et al.
Chemical Physics Letters, Mar. 15, 1980, vol. 70, No. 3, 508-512, "An Unusually Large Zero-Field Splitting in the Molecule Xanthione", D. M. Burland.
Chemical Physics, 68 (1982) 179-189, "Optically Resolved Zero Field Splittings in the Phosphorescence Spectra of Aromatic Thioketones", Taherian et al.
Journal of Chemical Physics, 78(12), Jun. 15, 1983, 7099-7107, "Electron Spin-Lattice Relaxation in the Phosphorescent State of Xanthione", Taherian et al.
Chemical Physics Letters, Apr. 22, 1983, vol. 96, No. 5, 541-546, "The Phosphorescent State of -Thiopyrones: Optically-Resolved Zero-Field Splittings", Taherian et al.
Maki August H.
Taherian Mohammad-Reza
Krass Errol A.
Mattson Brian M.
The Regents of the University of California
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