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Articles 181 - 183 of 183

Full-Text Articles in Physics

Compendium Of Bag-Model Matrix-Elements Of The Weak Non-Leptonic Hamiltonian, Jf Donoghue, E Golowich, Br Holstein, Wa Ponce Feb 1981

Compendium Of Bag-Model Matrix-Elements Of The Weak Non-Leptonic Hamiltonian, Jf Donoghue, E Golowich, Br Holstein, Wa Ponce

Barry R Holstein

A comprehensive list of baryon and meson single-particle matrix elements of the nonleptonic weak Hamiltonian is presented.


Triple Gamma Directional Correlations In The Decay Of Europium-154, Gary Lewis Dec 1980

Triple Gamma Directional Correlations In The Decay Of Europium-154, Gary Lewis

Gary C. Lewis

The ('154)Eu nucleus decays by beta emission to an excited state of the ('154)Gd nucleus. The resulting ('154)Gd nucleus decays to its ground state by emission of gamma rays. One series of gamma rays emitted in this process is a cascade of energies 723 keV, 873 keV, and 123 keV. The 873 keV gamma ray is a mixture of E2 and M1 radiation. The mixing ratio of this transition has been measured using the triple gamma directional correlation technique. The experiments used a planar geometry with one angle fixed at 90 degrees. Two Ge(Li) detectors and one NaI(T1) detector were …


Ionic Polishing Of Fused Silica And Glass, Raymond Wilson Dec 1969

Ionic Polishing Of Fused Silica And Glass, Raymond Wilson

Raymond Wilson

This paper reviews research in the erosion of fused silica and glass in an effort to gain a better understanding of the ionic polishing process as applied to optical materials. Erosion rates depend on ion mass, ion energy, target temperature, angle of incidence, and target material, and can also depend on vacuum pressure. The paper also considers other effects that accompany ionic bombardment of insulators, such as nature of the eroded surface, contaminate films, surface layer alterations, secondary electron emission, and gas trapping and release.