Now showing items 21-30 of 69
Notes on the Infra‐Red Spectrum and Molecular Structure of Ozone
(The American Institute of Physics, 1946-06)
The nature of the fine structure of the band at 14.2μ in the absorption spectrum of ozone has been determined with prism and grating spectrometers. These data, together with the fine structure of the 9.57μ band (previously ...
Magnetic Field Measurement in Beta‐Ray Spectroscopy
(The American Institute of Physics, 1942-08)
Entropy of the Monomeric Forms of Formic Acid and Acetic Acid
(The American Institute of Physics, 1942-09)
A recent measurement of the entropy of gaseous formic acid at its equilibrium vapor pressure is combined with vapor density data to give 60.0±0.3 as the entropy of the monomer at 25° and one atmosphere. The corresponding ...
The Infra‐Red Prism Spectrograph as a Precision Instrument
(The American Institute of Physics, 1942-12)
An investigation of the working conditions of an infra‐red spectrometer of the recording type has resulted in techniques of operation which have increased the precision of the measurements attainable and has permitted an ...
Additional Stabilization for the Beam Current in the RCA Type B Electron Microscope
(The American Institute of Physics, 1945-03)
Magnetic Field Measurement in Beta‐Spectroscopy
(The American Institute of Physics, 1947-05)
To measure precisely the instantaneous value of a magnetic field, a device consisting of a drum‐armature wound on a Lucite form and rotated by a synchronous motor is described. The direct voltage output is taken off by ...
Determination of Object Thickness in Electron Microscopy
(The American Institute of Physics, 1941-10)
It is proposed that the thicknesses of electron microscope objects be determined by measuring the diminution in intensity of the electron beam caused by the object. Since this method would only be applied to specimens so ...
On the theory of cosmic-ray showers I the furry model and the fluctuation problem
(Elsevier, 1940-04)
The main problems regarding the shower formation by fast electrons are reviewed on the basis of a simplified model first proposed by Furry ( S S 1 and 2). A general method is developed for calculating the fluctuation in ...
A Microflash Unit for Ballistic Photography
(The American Institute of Physics, 1948-03)
A flash unit has been developed for photographing large projectiles in flight. The light source combines high intensity with short duration. Details of the geometry and processing of the lamp are given, together with a ...
One‐Sided Polarization of Ions in Vapor Molecules
(The American Institute of Physics, 1941-04)