Spin Lattice Relaxation of ¹⁹F in Crystalline Xenon Tetrafluoride

Journal Article · Tue Dec 31 23:00:00 EST 1963 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1725468· OSTI ID:4029189

Wade, Charles G.; Waugh, J. S.

The results of measurements of the spin-lattice relaxation time T/sub 1/ of the /sup 19/F nuclei in crystalline XeF/sub 4/ at 30 Mc/sec over the temperature range 77 to 373 deg K are presented The plot is linear between 250 deg K and the melting point, indicating that the relaxation is dominated by a single type of thermally activated molecular motion. At low temperatures, however, the plot departs from linearity, and T/sub 1/ approaches a value of approximately 1000 sec at 77 deg K. The slope yields a value for the activation energy, E/sub a/, of 12.0 plus or minus 1.5 kcal/mole. (P.C.H.)

• Research Organization: Massachusetts Inst. of Tech., Cambridge
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-018474
• OSTI ID: 4029189
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 7 Vol. 40; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CARBON 13
COINCIDENCE METHODS
CRYSTALS
DIAGRAMS
DIFFUSION LENGTH
ENERGY LEVELS
EXCITATION
FLUORINE 19
HEATING
INDEPENDENT PARTICLE MODEL
ISOSPIN
LATTICES
LOW TEMPERATURE
MEASURED VALUES
MIRROR NUCLEI
MOLECULES
MOTION
NITROGEN 13
NUCLEAR MODELS
NUCLEAR THEORY
NUCLEI
PARITY
PARTICLE MODELS
PHYSICS
QUANTUM MECHANICS
RELAXATION
SELECTION RULES
SPIN
TEMPERATURE
TRANSIENTS
XENON FLUORIDES