Improved Double‐Crystal Spectrometer for Small Angle Scattering Measurements

1950 ◽  
Vol 21 (4) ◽  
pp. 399-400 ◽  
Author(s):  
Leo Broussard
Keyword(s):  
Small Angle ◽  
Small Angle Scattering ◽  
Crystal Spectrometer ◽  
Double Crystal ◽  
Angle Scattering ◽  
Scattering Measurements

Ultra small Angle Neutron Scattering from Amorphous Ni-Pd-P-Alloys

1993 ◽  
Vol 48 (12) ◽  
pp. 1203-1206
Author(s):  
R. M. Hagenmayer ◽  
C. M. E. Zeyen ◽  
P. Lamparter ◽  
S. Steeb
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Small Angle Scattering ◽  
Surface Scattering ◽  
Immersion Method ◽  
Crystal Spectrometer ◽  
Double Crystal ◽  
Angle Scattering ◽  
Q Values

Abstract Using a neutron double crystal spectrometer, thin amorphous Ni-Pd-P-samples were investi-gated at very small Q-values (10-5 Å -1 ≦Q≦10 -3 Å -1). The immersion method shows that the small angle scattering effect is mainly caused by surface scattering.

Dimensions de micelles mixtes de p-alkylbenzènesulfonates par diffusion central des rayons X

1977 ◽  
Vol 10 (1) ◽  
pp. 37-44 ◽  
Author(s):  
C. Cabos ◽  
P. Delord ◽  
J. Rouviere
Keyword(s):  
Small Angle ◽  
Small Angle Scattering ◽  
Micellar Solutions ◽  
Probable Structure ◽  
X Ray ◽  
Absolute Scale ◽  
Angle Scattering ◽  
Scattering Measurements ◽  
Two Component ◽  
Most Probable Structure

The structure of micellar solutions is determined from X-ray small-angle scattering measurements on an absolute scale. The most probable structure is chosen by comparison with spherical cylindrical and lamellar models. This method is applied to two-component micelles and it is possible to follow the variation of micellar dimensions when the concentration of each component is varying.

An X-Ray Small-Angle Scattering Instrument

1967 ◽  
Vol 11 ◽  
pp. 332-338 ◽  
Author(s):  
Donald M. Koffman
Keyword(s):  
Small Angle ◽  
Scintillation Counter ◽  
Small Angle Scattering ◽  
High Angular Resolution ◽  
X Ray Diffraction ◽  
Multiple Diffraction ◽  
Double Crystal ◽  
X Ray ◽  
Angle Scattering ◽  
Diffraction Patterns

AbstractAn X-ray small-angle scattering instrument is described which is used for recording X-ray diffraction patterns or small-angle X-ray scattering curves in an angular region very close to the direct beam. The measurement of X-ray intensity is accomplished with standard geiger or scintillation counter techniques. The instrument is designed for use with a spot-focus or vertical-line X-ray source, In essence, it is a multiple-reflection double-crystal diffractometer, based on a concept developed by Bonse and Hart, employing two grooved perfect germanium crystals arranged in the parallel position. Multiple diffraction from these crystals produces a monochromated X-ray beam which can be several millimeters wide while still exhibiting extremely high angular resolution. As a result, effective sample volumes can be employed with maximum volume-to-thickness ratios. The principal features of the instrument are discussed with emphasis on the advantages of this device over those employing complex slit systems and film-re cording techniques, Data are presented to illustrate the operation, intensity, and resolution of the unit.

scholarly journals Metadata for small-angle scattering measurements

2017 ◽  
Vol 73 (a1) ◽  
pp. a101-a101
Author(s):  
Andrew J. Allen ◽  
Fan Zhang ◽  
Jan Ilavsky ◽  
Pete R. Jemian
Keyword(s):  
Small Angle ◽  
Small Angle Scattering ◽  
Angle Scattering ◽  
Scattering Measurements

Quantized Diameters in Self-assembled Cyundrical Aggregates of Chlorophylls

1989 ◽  
Vol 174 ◽  
Author(s):  
D. L. Worcester ◽  
T. J. Michalski ◽  
M. K. Bowman ◽  
J. J. Katz
Keyword(s):  
Neutron Scattering ◽  
Chlorophyll A ◽  
Strong Evidence ◽  
Small Angle ◽  
Small Angle Scattering ◽  
Bacteriochlorophyll A ◽  
Angle Scattering ◽  
Scattering Measurements ◽  
Hollow Cylinders ◽  
Neutron Small Angle Scattering

AbstractNeutron small-angle scattering measurements of several different chlorophylls hydrated in deuterated octane-toluene mixtures show that long, hollow cylinders of aggregated chlorophyll are formed. Clear secondary maxima are present in the scattering, and the cylinder diameters are well determined, but depend on the type of chlorophyll. Chlorophyll-a and Bacteriochlorophyll-a were particularly studied, and several samples of each have been measured. Other chlorophylls have also been studied. The results provide strong evidence that chlorophyll cylinders are only certain sizes, with diameters very nearly in the ratio of small integers. Thus, the cylinder diameters appear to be quantized. Neutron scattering results that further test this quantization property are presented here, together with a proposal for the stereochemical features of chlorophyll aggregation which account for the diameter quantization.

Sign in / Sign up

Export Citation Format

Share Document