A Model of Thermal Transfer in Czochralski Silicon Molten

Abstract

We introduce a local measure of the quality of a trial wave function: the local variance. Using this tool we examine the pair function often adopted to construct wave functions for small helium clusters and apply it to a wave function for 4 He2 using the TTY interaction potential. Our analysis shows that this commonly employed functional form should be improved in the short-range region. We introduce a new model based on the short-range behaviour of the exact ground-state solution of a Morse potential. The resulting compact trial wave function for 4 He2 recovers 98% of the exact binding energy with only six variational parameters.

Photoluminescent, electroluminescent and structural properties of CaS:Cu and CaS:Cu, Ag thin films

“…Both layers emit blue light with CIE (Commission Internationale de l'Eclairage) (X, Y ) colour coordinates (0.160, 0.063) and (0.164, 0.109) respectively. Our measurements are in good agreement with the results of Yamashita [13] on CaS:Cu powder phosphors. Comparison of the emission of Cu in CaS with that in SrS [12] teaches us that the shape of the emission peaks is different.…”

Raman, Far Infrared, and Mössbauer Spectroscopy of CuFeS2 Nanocrystallites

“…1,6) According to ref. 34, the blue emission of SrS:Cu and CaS:Cu originated from the inner shell transition of 3 E g ! 1 A 1g in the Cu þ .…”

The photoluminescence of SrS:Cu nanophosphor

“…The emission process has been attributed to the transition between perturbed energy levels of Cu + ions ( 3 E g to 1 A 1g ) in an octahedral crystal field [18]. The emission wavelength of the Cu + luminescence in SrS:Cu depends on the Cu concentration, co-dopants and temperature [19]. Blue luminescence in SrS:Cu is produced by [Cu + Sr ] − centers with coordination number 6.…”