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Full-Text Articles in Physical Sciences and Mathematics
A Theoretical Study Of Light Scattering From Water Droplets., Aaron J. Cox
A Theoretical Study Of Light Scattering From Water Droplets., Aaron J. Cox
Physics & Astronomy ETDs
No abstract provided.
On The Scintillation Of Stars., Mary Elizabeth Prince Phelan
On The Scintillation Of Stars., Mary Elizabeth Prince Phelan
Physics & Astronomy ETDs
The nature of stellar scintillation is important to the astronomer and to the atmospheric physicist, but little quantitative work has been done in this area. This paper describes the results of an objective study of stellar scintillation. The principle measurements were concerned with a determination of the scintillation pattern and rate of a star which was observed simultaneously in two photoelectric telescopes whose distance could be varied. Other items measured included variations in rate of scintillation with: stellar magnitude, stellar altitude, atmospheric changes, and time of evening.
Ultrasonic Suspension Of Liquid Droplets For Light Scattering Studies, David L. Cutchin
Ultrasonic Suspension Of Liquid Droplets For Light Scattering Studies, David L. Cutchin
Physics & Astronomy ETDs
The construction and operation of an ultrasonic liquid droplet suspension device are described. The problem of generating intense sonic waves by matching the sonic transducer components is investigated. There is a description and analysis of a light scattering experiment performed on a suspended water droplet. The moat prominent characteristic of the scattered light was a rapid (10 to 100 cycles per second) time fluctuation in intensity. The variation in scattering cross section with droplet diameter predicted by the Mie theory and droplet shape oscillations are investigated as possible mechanisms producing the fluctuations.
Measuring Spin-Lattice Relaxation Times With A Super-Regenerative Spectrometer, Alfred C. Rester Jr.
Measuring Spin-Lattice Relaxation Times With A Super-Regenerative Spectrometer, Alfred C. Rester Jr.
Physics & Astronomy ETDs
Nuclear quadrupole resonance is a branch of radio frequency spectroscopy which was discovered in 1950 by Dehmelt and Kruger. (1). It is concerned with radio-frequency magnetic resonance absorption in molecular crystals. It results from the interaction of the nuclear quadrupole moment with the electric field gradient of the molecule charge cloud surrounding the nucleus. Different orientations of the nuclear axis relative to the field axis correspond to different energy levels. Resonance absorption takes place when an applied electromagnetic field cause transitions from one energy level to a higher one.
An Investigation Of Neutron Collimators And Their Application In Neutron Radiography., Roger A. Morris
An Investigation Of Neutron Collimators And Their Application In Neutron Radiography., Roger A. Morris
Physics & Astronomy ETDs
One of the most important diagnostic tools in the fields of medicine and industry is the use of penetrating radiation to detect flaws, inhomogeneities, and abnormal conditions within an object without permanently changing or destroying the object being inspected. The equipment, technique, and type of radiation employed vary widely between hospital, shop, or laboratory depending upon the particular conditions that are encountered and the results that are expected. Probably the most widely used radiation types are X-rays or gamma-rays and their applications in the above-mentioned fields need no further description. However, beams of thermal neutrons are becoming more and more …