The Auroral Spectrum in the Wave-Length Range 3300-8900.

1952 ◽  
Vol 116 ◽  
pp. 433 ◽  
Author(s):  
A. W. Petrie ◽  
R. Small
Keyword(s):  
Wave Length ◽  
Length Range

Observations of the Zeta Spectrum in the Wave-length Range 16 Å–400 Å

Nature ◽  
1963 ◽  
Vol 200 (4913) ◽  
pp. 1303-1304 ◽  
Author(s):  
B. C. FAWCETT ◽  
A. H. GABRIEL ◽  
W. G. GRIFFIN ◽  
B. B. JONES ◽  
R. WILSON
Keyword(s):  
Wave Length ◽  
Length Range

A Comparison of (100) Hg1−x Cdx Te and Hg1−x ZnxTe Grown By Molecular Beam Epitaxy

1987 ◽  
Vol 102 ◽  
Author(s):  
R. D. Feldman ◽  
R. F. Austin ◽  
P. M. Bridenbaugh
Keyword(s):  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Near Infrared ◽  
Wave Length ◽  
High Electron ◽  
Mbe Growth ◽  
Suitable Material ◽  
Zn Content ◽  
Length Range ◽  
Very High

ABSTRACTFilms of HgCdTe with x < 0.6 and of HgZnTe with x < 0.26 have been grown by molecular beam epitaxy (MBE). Very high electron mobilities have been achieved for both materials in the small bandgap region. Hall mobilities at 77K reach 4.8 × 105 cm2 /V-s for Hg0 87 Zn0.13 Te, and 3.1 × 105 cm2/V-s for Hg0.87 Zn0.13 Te. HgCdTe growth was easily extended to the 1.5 – 3 μm wave length range. Attempts to extend HgZnTe to these bandgaps were unsuccessful due to defects that are induced by surface roughness in high Zn-content films. These results suggest that HgCdTe is the more suitable material for MBE growth for near infrared applications.

scholarly journals First Results and Discoveries with the ISO Short-Wavelength Spectrometer

1998 ◽  
Vol 11 (2) ◽  
pp. 1113-1115
Author(s):  
Thijs De Graauw
Keyword(s):  
Spectral Resolution ◽  
Short Wavelength ◽  
Wave Length ◽  
Space Observatory ◽  
Infrared Space Observatory ◽  
Length Range ◽  
First Results ◽  
Scientific Results

AbstractThe Short-Wavelength Spectrometer(SWS) is one of the four instruments on-board of ESA’s Infrared Space Observatory(ISO), launched on 15 Nov. 1995. It covers the wave-length range of 2.38-45.2μm with a spectral resolution ranging from 1000-2000. An overview is given of the in-orbit performance and a summary of the main scientific results and discoveries obtained in the first 18 months of operation of the ISO-SWS.

Application of Nuclear Coincidence Methods to Atomic Transitions in the Wave-length Range λλ 2000-6000 A.

Nature ◽  
1955 ◽  
Vol 175 (4462) ◽  
pp. 810-811 ◽  
Author(s):  
ERIC BRANNEN ◽  
F. R. HUNT ◽  
R. H. ADLINGTON ◽  
R. W. NICHOLLS
Keyword(s):  
Wave Length ◽  
Atomic Transitions ◽  
Length Range

THE ULTRAVIOLET ABSORPTION SPECTRA OF SEVERAL DEHYDRATION AND OXIDATION DERIVATIVES OF CHOLESTEROL

1951 ◽  
Vol 29 (5) ◽  
pp. 398-408 ◽  
Author(s):  
R. H. Cox ◽  
E. Y. Spencer
Keyword(s):  
Absorption Spectra ◽  
Wave Length ◽  
Animal Experimentation ◽  
Ultraviolet Absorption ◽  
Oxidation Products ◽  
Length Range ◽  
Enol Acetate ◽  
Enol Esters ◽  
Derivatives Of

Certain dehydration and oxidation products of cholesterol were prepared for subsequent animal experimentation. The ultraviolet absorption spectra of those derivatives possessing two or more conjugate chromophores were determined spectrophotometrically over the wave length range of 220 mμ to 350 mμ. The relative coincidence of the experimental λmax and εmax values of cholestadiene-3, 5 and of the enol acetate of cholesten–4–one–3 is offered as support for a 3, 5-diene structure for the latter steroid in particular and for enol esters of 4,5-unsaturated 3-ketosteroids in general.

VII.— An Investigation of the Absorption of Superposed X-radiations

1926 ◽  
Vol 45 (1) ◽  
pp. 48-58
Author(s):  
Wm. H. Watson
Keyword(s):  
Absorption Coefficient ◽  
Wave Length ◽  
Mass Absorption Coefficient ◽  
Critical Conditions ◽  
Characteristic Radiation ◽  
X Ray ◽  
Mass Absorption ◽  
Length Range

The first experiments on this subject were suggested by the absorption effects associated with the “J” phenomenon. In a comparison of the absorbability in aluminium and in copper of the radiation emitted in one direction from an X-ray tube, it is found that in many cases, as the tube is hardened and a certain value of the mass-absorption coefficient reached, there is a sudden increase in the absorption by aluminium. Since the radiation is not strictly homogeneous, and since the above effect does not invariably take place, it is evident that the phenomenon is not to be explained simply in terms of a “J” series characteristic radiation similar to K and L characteristic radiations as regards the manner of its excitation. It is evident that certain critical conditions must obtain before the phenomenon occurs, and on account of the abruptness of the change it appears as though the whole wave-length range of the radiation were affected in respect of absorption by aluminium. This seems to be further substantiated by the fact that the discontinuous character of the change in absorption is preserved with a beam which is much more heterogeneous.

TOF Measurements of Pulsed Neutrons for Texture Analysis of Low Symmetry Materials

1989 ◽  
Vol 166 ◽  
Author(s):  
Allen C. Larson ◽  
Phillip J. Vergamini ◽  
Hans-Rudolf Wenk
Keyword(s):  
Wave Length ◽  
Preferred Orientation ◽  
Strain History ◽  
Standard Samples ◽  
Large Wave ◽  
Pole Figures ◽  
Length Range ◽  
History Of ◽  
Lattice Planes ◽  
Temperature Strain

ABSTRACTThe single crystal diffractometer at LANSCE, SCD, provides an ideal ca- pability for the study of preferred orientation in geological samples by time-of flight(TOF) measurement of pulsed neutrons. The 2-d position sensitive neutron detector with the large wave length range allows one to measure the complete dis- tribution of intensities for several poles very quickly. Each histogram covers about πt2/16 radians of reciprocal space and contains information from all possible poles visible with the wave length range used, usually about 0.5 to 5.OÅ. With this method complete pole figures of many lattice planes can be constructed from only 12 to 20 sample orientations as compared to over 1000 sample settings per lattice plane using conventional diffractometers.Pole figures from measurements of experimentally deformed standard samples of calcite and quartzite with a known history of deformation provide in- formation about deformation mechanisms and their temperature/strain history. This information can be applied to interpret preferred orientation of naturally de- formed rocks.

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