A simple analytic expression for optical cross sections associated with deep impurity states in semiconductors

1975 ◽  
Vol 8 (11) ◽  
pp. L264-L266 ◽  
Author(s):  
M Jaros
Keyword(s):  
Cross Sections ◽  
Deep Impurity ◽  
Impurity States ◽  
Simple Analytic Expression ◽  
Analytic Expression

scholarly journals The Electronic States of Some Metal Impurities in Germanium

1982 ◽  
Vol 35 (1) ◽  
pp. 53 ◽  
Author(s):  
SJ Pearton
Keyword(s):  
Electrical Properties ◽  
Cross Sections ◽  
Energy Levels ◽  
Electronic States ◽  
Capture Cross ◽  
Deep Impurity ◽  
Impurity States ◽  
Metal Impurities ◽  
Capacitance Spectroscopy ◽  
Capture Cross Sections

Capacitance spectroscopy measurements of the energy levels and majority carrier capture cross sections of deep impurity states associated with S, Zn, Pb and Bi in Ge are presented. Similarities in the electrical properties of these elements with other deep impurities in Ge are discussed.

Degeneracy Factor and Pressure Dependence of Si-Induced Deep Impurity States in AlxGa1-xAs from Transport Experiments under Hydrostatic Pressure

1991 ◽  
Vol 38-41 ◽  
pp. 857-862 ◽  
Author(s):  
S. Azema ◽  
V. Mosser ◽  
Jean Camassel ◽  
R. Piotrzkowski ◽  
Jean-Louis Robert ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Pressure Dependence ◽  
Deep Impurity ◽  
Impurity States

Deep impurity states in Hg1−xCdxTe

1984 ◽  
Vol 50 (12) ◽  
pp. 1065-1068 ◽  
Author(s):  
C. Tuncay ◽  
M. Tomak
Keyword(s):  
Deep Impurity ◽  
Impurity States

Deep impurity states and intrinsic defects in photorefractive Cd1−x FexTe crystals

1998 ◽  
Vol 40 (7) ◽  
pp. 1107-1111 ◽  
Author(s):  
Yu. P. Gnatenko ◽  
R. V. Gamernik ◽  
I. A. Farina ◽  
P. I. Babii
Keyword(s):  
Intrinsic Defects ◽  
Deep Impurity ◽  
Impurity States

Emission Spectra of Deep Impurity States in Solid and Liquid Rare Gas Alloys

1972 ◽  
Vol 57 (11) ◽  
pp. 4628-4632 ◽  
Author(s):  
Ori Cheshnovsky ◽  
Baruch Raz ◽  
Joshua Jortner
Keyword(s):  
Emission Spectra ◽  
Rare Gas ◽  
Deep Impurity ◽  
Impurity States

scholarly journals Estimating the Risk of Satellite Collisions in Densely Populated Orbit Shells

2021 ◽  
Author(s):  
William Lee ◽  
Paul Martin ◽  
Ann Smith ◽  
Giancarlo Antonucci ◽  
Georgia Brennan ◽  
...  
Keyword(s):  
Time Dependence ◽  
Low Earth Orbit ◽  
Collision Probability ◽  
Earth Orbit ◽  
Limited Information ◽  
Asymptotic Approach ◽  
Optimal Point ◽  
Single Collision ◽  
Simple Analytic Expression ◽  
Analytic Expression

Low Earth Orbit is becoming crowded with satellites. Updating estimates of collision probabilities is important as new deployments are authorised but is difficult because only limited information is given. This report investigates developing analytic estimates of collision probabilities. A survey of approaches reported in the literature is carried out. A collision involving a satellite from the Iridium cluster is reviewed. A simple analytic expression for the collision probability between two satellites is derived using the smallness of several dimensionless ratios appearing in the problem. Single collision probabilities are then extended to orbital planes populated by n satellites with the aim of finding the optimal point at which to traverse such an orbit. This report demonstrates that analytic estimates relevant to the problem can be made. Further work should focus on: making these estimates rigorous by using a formal asymptotic approach, considering multiple orbital planes and introducing time dependence

scholarly journals Partial Wave Analysis of the l8O(p, a0)15N Reaction

1979 ◽  
Vol 32 (3) ◽  
pp. 187 ◽  
Author(s):  
LWJ Wild ◽  
BM Spicer
Keyword(s):  
Least Squares ◽  
Partial Wave ◽  
Cross Sections ◽  
Differential Cross ◽  
Partial Wave Analysis ◽  
Differential Cross Sections ◽  
Wave Analysis ◽  
Least Squares Fitting ◽  
Analytic Expression ◽  
Bombarding Energy

A partial wave analysis of the differential cross sections for the 180(p,OCO)15N reaction has been carried out by applying the formalism of .Blatt and Biedenharn (1952), made specific for this reaction. The differential cross sections, measured at 200 keV intervals from 6�6 to 10�4 MeV bombarding energy, were subjected to least-squares fitting to this specific analytic expression. Two resonances were given by the analysis, the 19p states being at 14�71 �0�07 MeV (1/2-) and 14�80�0�07 MeV (1/2 +).

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