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Articles 961 - 967 of 967

Full-Text Articles in Physics

Isomer-Shift Measurement In W182, S. G. Cohen, N. A. Blum, Y. W. Chow, Richard B. Frankel, L. Grodzins Feb 1966

Isomer-Shift Measurement In W182, S. G. Cohen, N. A. Blum, Y. W. Chow, Richard B. Frankel, L. Grodzins

Physics

No abstract provided.


Magnetic Structure Of Ga2−Xfexo3, R. B. Frankel, N. A. Blum, S. Foner, A. J. Freeman, M. Schieber Jan 1966

Magnetic Structure Of Ga2−Xfexo3, R. B. Frankel, N. A. Blum, S. Foner, A. J. Freeman, M. Schieber

Physics

High‐magnetic‐field‐Mössbauer and magnetic‐moment experiments have been performed with Ga2−xFexO3. This magnetic system is of considerable interest because it is piezoelectric, weakly magnetic,1 and magnetoelectric.2 The crystal structure has been determined3 and a magnetic ordering inferred.3 The magnetic‐moment measurements were made using a vibrating sample magnetometer in fields up to 75 kOe. The samples used for the Mössbauer absorption experiments consisted of 57Fe enriched powders, grown from a flux, embedded in lucite, and having x=0.8 and 1.2. A mosaic absorber made of small x‐ray oriented single crystals was also studied. Measurements were made over the temperature range 4.2° to 320°K and …


Ferrimagnetic Structure Of Magnetoelectric Ga2-XFeXO3, Richard B. Frankel, N. A. Blum, S. Foner, A. J. Freeman, M. Schieber Dec 1965

Ferrimagnetic Structure Of Magnetoelectric Ga2-XFeXO3, Richard B. Frankel, N. A. Blum, S. Foner, A. J. Freeman, M. Schieber

Physics

No abstract provided.


Cerium Magnesium Nitrate Temperature Scale From Nuclear Orientation, Richard B. Frankel, D. A. Shirley, N. J. Stone Nov 1965

Cerium Magnesium Nitrate Temperature Scale From Nuclear Orientation, Richard B. Frankel, D. A. Shirley, N. J. Stone

Physics

Systematic deviations were found below 0.003°K in the temperature dependence of nuclear orientation of Ce137m in cerous magnesium nitrate, using the temperature scale proposed by Daniels and Robinson. The temperature scale below 0.006°K was redetermined using a new method: nuclear orientation. This has the advantage over the 'Y-ray heating method of high sensitivity at the lowest temperature. The most striking result is hat a value of 1/T of 520, rather than the previously accepted 324, is obtained by demagnetization from initial condItions of 18.8 kG deg-1. The useful absolute temperature range is thus extended by …


Sign Change Of Induced Hyperfine Fields In The 5p Shell, Richard B. Frankel, J. J. Huntzicker, E. Matthias, S. S. Rosenblum, N. J. Stone Mar 1965

Sign Change Of Induced Hyperfine Fields In The 5p Shell, Richard B. Frankel, J. J. Huntzicker, E. Matthias, S. S. Rosenblum, N. J. Stone

Physics

No abstract provided.


Angular Distributions Of Conversion Electrons From Oriented Ce137M Nuclei, Richard B. Frankel, D. A. Shirley, N. J. Stone Nov 1964

Angular Distributions Of Conversion Electrons From Oriented Ce137M Nuclei, Richard B. Frankel, D. A. Shirley, N. J. Stone

Physics

The angular distributions of K- and of (L+M)-conversion electrons from oriented Ce137m nuclei were observed. Precise simultaneous intensity measurements of conversion electrons and γ rays from the same sample provided an accurate, direct determination of the particle parameters b2 associated with the 255-keV isomeric transition in Ce137. The K-electron result, b2=1.061 (18), is in excellent agreement with a theoretical prediction based on a "point nucleus" model. Techniques and parameters in this experiment, the first of its kind, are discussed. A more careful determination of the temperature dependence of …


Resonant Absorption Studies With Eu151, D. A. Shirley, Richard B. Frankel, H. H. Wickman Jan 1964

Resonant Absorption Studies With Eu151, D. A. Shirley, Richard B. Frankel, H. H. Wickman

Physics

No abstract provided.