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Decomposition and cold flow of silver chloride windows when used in an all‐metal absorption cell have been eliminated by encapsulation of the window in a Lucite holder of simple design.
A high‐pressure dilatometer was devised to measure the length change of specimens under hydrostatic pressure up to 22 kilobars. The dilatometer uses a linear variable differential transformer and exhibits a hysteresis with pressure cycling. With a careful calibration of the dilatometer vs...
A simple circuit for cw NMR measurements is discussed. The purpose of this circuit is similar to that of bridge arrangements: The rf at the input of the receiver is compensated by an additional branch within the circuit consisting of a potentiometer and a phase shifter. As shown by theoretical...
A nozzle beam source that can be operated to 3 K with helium gas is described. At this lowest temperature the full width at half maximum in velocity is 9%, the gas flow rate is 3.3 atmospheric m l ∕min of room temperature helium, and the density is 4.6×10 12 atoms∕cm 3 measured 2.5 cm from...
A digitized magnetic‐field sweeper is described that is designed for the signal‐averaging digital computer aided ESR spectrometer.
An apparatus and techniques are described which have been found adequate for making nominally 1% accurate specific heat measurements on relatively low thermal conductivity alloys in the range of temperature from 0.5 to 10 K and in magnetic fields of 0 to 1.5 T (15 kG). Emphasis is given to...
A technique has been used to measure electron beams in excess of 200 kA∕cm 2 with energies of 10 5 −10 6 eV. The technique uses a high‐level nanosecond risetime Faraday cup combined with a dielectric differential range filter to separate the primary electrons from low‐energy charge...
We report a high sensitivity, near‐infrared circular dichroism (CD) instrument. CD is measured by the standard modulation method; phase modulation is provided by an Infrasil quartz photoelastic modulator. The spectral range 0.8–3.0 μ is spanned. Incorporation of a superconducting magnet...
A source for condensible gases and vapors which allows for the production of a pulsed nozzle beam with a beam oven temperature of about 670 K is described. This source is especially suitable for providing the target beam at a beam intersection angle of between 20° and 160° needed for scattering...
Low energy separated beams into very large bubble chambers, such as the Argonne National Laboratory 12 ft chamber, will have the consequence that many of the secondary particles will be magnetically trapped within the chamber volume. We show that for a highly uniform magnetic field, the turning...
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