QUADRUPOLE RELAXATION OF THE ISOTOPE Hg$sup 201$ ON A QUARTZ SURFACE

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · J. Phys.

DOI:https://doi.org/10.1051/jphys:01963002409065300· OSTI ID:4108013

Cohen-Tannoudji, C

Nuclear relaxation produced by collisions on quartz walls of optically oriented Hg/sup 201/ atoms is studied theoretically and experimentally. The relaxation mechanism is assumed to be the quadrupole coupling between the Hg/sup 201/ nucleus and the electrical field gradients, which appear at the nucleus during the adsorption of the atom on the wall. The general formalism of the theory of relaxation in liquids and gases is used to obtain the time evolution of the density matrix representing the ensemble of atoms. The various longitudinal and transverse relaxation times are expressed as a function of the microscopic physical quantities, which describe the adsorption of the atom on the wall. The various relaxation times have been measured by carrying out the magnetic resonance on an optically pumped Hg/sup 201/ vapor and by observing on the optical signals the transient phenomena, which appear when the r-f field is shut off. In particular, the free precession of the Hg/sup 201/ nuclei has been detected on the modulation at the Larmor frequency of the optical absorption of the vapor. All the experimental results are in agreement with the predictions of the above theoretical model, particularly for the iatios between the various relaxation times. In this way, one can obtain informations on some of the microscopic physical quantities, such as correlation time and dwell time. (auth)

• Research Organization: Laboratoire de Physique de l'E.N.S., Paris
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-007727
• OSTI ID: 4108013
• Journal Information: J. Phys., Journal Name: J. Phys. Vol. Vol: 24
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ABSORPTION
ADSORPTION
ATOMS
COLLISIONS
DENSITY
ELECTRIC FIELDS
ELECTROMAGNETIC FIELDS
FREQUENCY
GASES
GYROMAGNETIC RATIO
INTERACTIONS
ISOTOPES
LARMOR FREQUENCY
LIQUIDS
MAGNETIC FIELDS
MATRICES
MEASURED VALUES
MERCURY 201
MODULATION
NUCLEAR MAGNETIC RESONANCE
NUCLEAR MODELS
OPTICAL PUMPING
OPTICAL SYSTEMS
PHYSICS
POLARIZATION
QUARTZ
SURFACES
TRANSIENTS
VAPORS