ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Hits per page

hits 1 - 3 | 3 hits

Sorting

Electronic Resource

On the carbon incorporation into a-SiC:H films with low carbon content (1992)

de Oliveira, M. L. ; Camargo, S. S. ; Freire, F. L.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 71 (1992), S. 1531-1533

add to mindlist on the mindlist

Details

ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: In this paper we report on carbon incorporation into a-SiC:H films with low carbon content deposited from SiH4:CH4:H2 gaseous mixtures. In the case of films deposited without H2 dilution, carbon incorporation mainly as CH3 groups, was determined. Increasing H2 dilution was found to induce a selective incorporation of radicals that affects the density of C—H bonds, thus reducing the mean number of carbon bonded hydrogen atoms per carbon atom. Our observations allowed the estimation of the oscillator strength for the C—H stretching mode of CH3 groups in undiluted a-SiC:H films, obtaining ΓC—H(CH3)=9×10−23 cm2.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.351224

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Renormalization group in magnetohydrodynamic turbulence (1992)

Camargo, S. J. ; Tasso, H.

New York, NY : American Institute of Physics (AIP)

Physics of Fluids 4 (1992), S. 1199-1212

add to mindlist on the mindlist

Details

ISSN: 1089-7666

Source: AIP Digital Archive

Topics: Physics

Notes: The renormalization group (RNG) theory is applied to magnetohydrodynamic (MHD) equations written in Elsässer variables, as done by Yakhot and Orszag for Navier–Stokes equations. As a result, a system of coupled nonlinear differential equations for the "effective'' or turbulent "viscosities'' is obtained. Without solving this system, it is possible to prove their exponential behavior at the "fixed point'' and also determine the effective viscosity and resistivity. Strictly speaking, the results do not allow negative effective viscosity or resistivity, but in certain cases the effective resistivity can be continued to negative values, but not the effective viscosity. In other cases, the system tends to zero effective viscosity or resistivity. The range of possible values of the turbulent Prandtl number is also determined; the system tends to different values of this number, depending on the initial values of the viscosity and resistivity and the way the system is excited.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.860128

Permalink