Accession Number : AD0631387

Title :   SEMIANNUAL REPORT, OCTOBER 1, 1965-MARCH 31, 1966.

Descriptive Note : Status rept.,

Corporate Author : DUKE UNIV DURHAM N C DEPT OF PHYSICS

Personal Author(s) : Meyer,Horst

Report Date : 31 MAR 1966

Pagination or Media Count : 4

Abstract : NUCLEAR RESONANCE IN SOLID H2 and D2. Measurements on derivatives of the line shape and on longitudinal relaxation time were carried out on solid H2 for several ortho concentrations as a function of temperature. A new interpretation was made of the relaxation mechanism in solid H2; the interpretation was based on electric quadrupole-quadrupole interaction. SPECIFIC HEAT OF RARE EARTH GARNETS: Measurements between 0.4 and 4.0 degrees K on a superpure yttrium, iron, garnet (YIG) sample show that the specific heat cannot be analyzed at low enough temperatures in terms of a T (3/2) spin wave contribution (corrected for anisotropy and dipolar coupling) and the T (3) lattice contribution. NUCLEAR RESONANCE OF FE-57 IN RARE EARTH GARNETS: The 57-Fe gyromagnetic ratio in YIG was measured with a precision comparable to that obtained by Endor measurements. Spinwave expressions for magnetization in YIG in an external magnetic field were tested at 63 and 77 degrees K.

Descriptors :   (*NUCLEAR MAGNETIC RESONANCE, *HYDROGEN), (*GARNET, SPECIFIC HEAT), DEUTERIUM, SOLIDS, RARE EARTH COMPOUNDS, YTTRIUM COMPOUNDS, IRON, RADIOACTIVE ISOTOPES, RELAXATION TIME

Subject Categories : Nuclear Physics & Elementary Particle Physics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE