Now showing items 31-40 of 41
Local Operator Algebras in the Presence of Superselection Rules
(The American Institute of Physics, 1968-10)
An introductory study is made of the relation between the local algebra of observables associated to a region of space‐time and the algebra of all operators (disregarding superselection rules) associated to the same region ...
Electron‐Diffraction Study of Ammonia and Deuteroammonia
(The American Institute of Physics, 1968-09-15)
The gas‐phase structures of NH3 and ND3 molecules were determined by the sector‐microphotometer method of electron diffraction. The following internuclear distances rgrg and mean amplitudes lele with estimated standard ...
Monte Carlo Simulation of the Low‐Voltage Arc Mode in Plasma Diodes
(The American Institute of Physics, 1968-07)
A statistical simulation of the low‐voltage arc mode of plasma diodes is carried out on a large‐scale digital computer to ascertain the importance of various thermalization and transport mechanisms. The computer experiment ...
Spin‐Resonance Properties of Scheelites. I. Vanadium in CaWO4
(The American Institute of Physics, 1968-02-01)
This paper is intended as the first of a series of investigations directed at obtaining information about charge compensation in CaWO4. Vanadium, which lies immediately above niobium in the periodic table, is introduced ...
Uranium Monosulfide. The Ferromagnetic Transition. The Heat Capacity and Thermodynamic Properties from 1.5° to 350°K
(The American Institute of Physics, 1968-01-01)
The heat capacity of uranium monosulfide was measured from 1.5° to 22°K by an isothermal (isoperibol) method and from 6° to 350°K by an adiabatic technique. The ferromagnetic transition at 180.1°K has a characteristic ...
Low‐Temperature Thermal Properties of Calcium Tungstate
(The American Institute of Physics, 1968-10-15)
The heat capacity of a single crystal of CaWO4 was determined by adiabatic calorimetry from 5° to 350°K and found to be without transitions or thermal anomalies. Deviation of the curve from normal sigmate shape is shown ...
Comparison of Molecular Structures Determined by Electron Diffraction and Spectroscopy. Ethane and Diborane
(The American Institute of Physics, 1968-11-15)
Gas‐phase average structures for the ground‐vibrational state (rz)(rz) for ethane and diborane have been determined by a critical comparison of the experimental results obtained from electron diffraction (average internuclear ...
Lattice‐Frequency Studies of Crystalline and Fold Structure in Polyethylene
(The American Institute of Physics, 1968-10)
The assignment of the 71 cm−1 band in the infrared spectrum of polyethylene to the B1u translational lattice vibration has been confirmed by dichroism studies on an a‐axis oriented sample. This permits confident use of the ...
Exploding Wire System with in Vacuo Preparation of Lithium Wire
(The American Institute of Physics, 1968-09)
Stochastic Approach to the Theory of Fluctuations in Plasmas
(The American Institute of Physics, 1968-03)
A stochastic (in contrast to kinetic theoretic) approach to the calculation of correlation functions in fully ionized plasmas is investigated. Formally different results are obtained. The question as to whether or not the ...