Accession Number : ADA090332


Title :   Relaxation Phenomena in Optically Pumped Mercury Isotopes.


Descriptive Note : Interim rept. 1 Jul 79-30 Jun 80,


Corporate Author : SINGER CO LITTLE FALLS NJ KEARFOTT DIV


Personal Author(s) : Heimann,Peter A ; Simpson,James H ; Kelly,Michael J


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA090332


Report Date : 15 Aug 1980


Pagination or Media Count : 82


Abstract : The origins and effects of both randomly-fluctuating and steady-state quadrupole perturbations on 201Hg have been clarified greatly. These perturbations are an unavoidable consequence of the adsorption of 201Hg on the cell wall, and are not greatly affected by the fine details of the surface at the adsorption site. A complete description of a quadrupole perturbation must include effects such as torques on the nucleus, in addition to including the shift in the Zeeman energy levels. A calculation using such a complete description predicted that the relaxation rate of 201Hg in a cube-shaped cell should be independent of cell orientation. This prediction was verified experimentally. Another calculation, which modelled 201Hg as a single four-level spin system instead of three two-level spin systems, predicted a functional form for the non-exponential decay of 201Hg in the presence of a quadrupole perturbation. These predictions were also verified experimentally. (Author)


Descriptors :   *NUCLEAR MAGNETIC RESONANCE , *ISOTOPES , *MERCURY , *RELAXATION , *OPTICAL PUMPING , MATHEMATICAL MODELS , ULTRAVIOLET RADIATION , SILICON DIOXIDE , ADSORPTION , QUADRUPOLE MOMENT , SURFACE PROPERTIES , PERTURBATIONS , TORQUE , CELL WALL , METAL VAPORS , NUCLEAR SPINS


Subject Categories : Nuclear Physics & Elementary Particle Physics
      Quantum Theory and Relativity


Distribution Statement : APPROVED FOR PUBLIC RELEASE