Zobrazeno 1 - 10
of 13
pro vyhledávání: '"D. M. Nicholas"'
Publikováno v:
SID Symposium Digest of Technical Papers. 33:388
It is shown that the luminance in Y2O3: Eu powder layer is proportional to the power of the electron beam. This is different to our findings in thin films. Particularly there is no measurable earth current in the spherical phosphor particle screens.
Publikováno v:
SID Symposium Digest of Technical Papers. 30:1030
Studies of the cathodoluminescent light output of phosphor thin films excited by a low energy electron beam, of the order of 1keV, show that the light output is distributed throughout the film thickness of up to 2μm. It is concluded that the origin
Autor:
D. M. Nicholas, Y. T. Shah
Publikováno v:
Product R&D. 15:35-40
Autor:
D M Nicholas, R Simon
Publikováno v:
Journal of Physics D: Applied Physics. 18:1423-1430
A method of measuring tilt angles in uniformly aligned thin films of a liquid crystalline material is described. Within the range 15 degrees to 75 degrees , the method is accurate to better than +or-0.5 degrees . It depends upon measuring the change
Autor:
D M Nicholas
Publikováno v:
Physics Education. 11:428-433
The concept of the atom is usually ascribed to Democritus, and its development from a philosophical abstraction to a scientific axiom attributed to Dalton (1808) and Avogadro (1811). There is, however, a parallel path which has its origins in the stu
Publikováno v:
Product R&D. 15:29-35
Publikováno v:
Journal of Applied Crystallography. 5:262-267
Radial distribution functions obtained from polycrystalline materials are influenced by both the atomic bonding and the crystallite size. A modified radial distribution function has been deduced which is independent of crystallite size and a function
Publikováno v:
Journal of Materials Science Letters. 7:304-306
Etude par analyses thermogravimetriques et diffraction des RX de l'oxydation dans l'air de l'alliage Co 5 Sm
Publikováno v:
Journal of Crystal Growth. 38:269-271
Barium zinc sulphide, Ba2ZnS3 has been produced in a hitherto unpublished manner, by a solid state reaction between ZnS and BaS. The melting point of Ba2ZnS3 has been determined as 997°C, and single crystals of this material (3 × 1 × 1 mm) have be
Publikováno v:
Journal of Applied Crystallography. 16:141-142
Compounds of the formula KLiMS2, where M is one of the divalent transition elements Zn, Mn or Fe, belong to the tetragonal crystal system. They are not, however, isomorphous. KLiZnS2: P, a = 6.600(5), c = 15.570(5) Å; KLiMnS2: P, a = 6.800(5), c = 1