In the present paper we simulate the processes accompanying the SiC/Si epitaxial growth. The model suggested describes the formation and growth of voids at SiC/Si interface. These voids are sources ...of Si atoms for SiC growth. According to the model the size distribution function was obtained being in good agreement with experimental data. The influence of surfactants on the nucleation and growth of SiC nanoislands on Si was studied as well.
Simulation der SiC/Si – Grenzflächenqualität während der MBE – Abscheidung von C auf Si
Im vorliegenden Beitrag wurden die Prozesse, die bei epitaxialem Wachstum von SiC auf Si während der Molekularstrahlepitaxie von C auf Si – Oberflächen ablaufen, simuliert. Das vorgeschlagene Model beschreibt die Bildung und das Wachstum von Hohlräumen and der SiC/Si – Grenzfläche. Diese Hohlräume fungieren als Quelle für Si – Atome die einen Beitrag zum SiC – Wachstum liefern. Auf der Grundlage des Models wurden die Größenverteilung der Hohlräume berechnet, die sich in guter Übereinstimmung mit den experimentellen Daten befindet. Desweitern wurde der Einfluß von Surfactanten auf die Nukleation und das Wachstum von SiC Nanoclustern auf Si – Oberflächen untersucht.
STUDY OF ψ(2S) → μ+μ- DECAY WITH KEDR DETECTOR AULCHENKO, V. M; BALDIN, E. M; BARLADYAN, A. K ...
International Journal of Modern Physics: Conference Series,
2014, Letnik:
35
Journal Article, Conference Proceeding
Recenzirano
Since 2004 the KEDR detector at the VEPP-4M collider has taken several data sets in the ψ(2S) region, acquiring total luminosity of about 7 pb-1, which corresponds to more than 3.5 × 106ψ(2S).
We ...report the preliminary value of Γee × Γμμ/Γ = 19.4 ± 0.4 ± 1.1 eV for ψ(2S).
PARAMETERS OF CHARMONIUM STATES FROM KEDR AULCHENKO, V. M; BALDIN, E. M; BARLADYAN, A. K ...
International Journal of Modern Physics: Conference Series,
2014, Letnik:
35
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
We report results of experiments performed with the KEDR detector at the VEPP-4M e+e- collider. They include final results for the mass and other parameters of the J/ψ, ψ(2S) and ψ(3770) and J/ψ → ...γηc branching fraction determination.
Dynamics of the elimination of the temperature-sensitive lethal mutation l(2)M167 super(DTS) from experimental populations of Drosophila melanogaster under permissive conditions (25 degree C) was ...studied. We have shown a rapid elimination of the mutation from the populations, selection for fitness of heterozygous individuals, association of the selection with high larval density and with the direction of the cross that had produced the founder males of the l(2)M167 super(DTS)/+ population, and the effect of relative competitive ability of l(2)M167 super(DTS)/+ males on the efficiency of the mutation introduction. Modification systems were shown be involved in fitness selection under conditions of high larval density.
The main aim of the KLOE experiment at DAΦNE, the Frascati
φ-factory, is to study CP violation in the K
0–
K
̄
0
system. Requirements on shower detection are very stringent. An hermetic, ...lead-scintillating fiber sampling calorimeter has been chosen and built. A review of the methods used to calibrate and reconstruct energy and timing is reported in this paper. Emphasis is given to the calibration procedures developed using the 2.4 pb
−1 collected in 1999. An energy resolution of
5.7%/
E/
GeV
is achieved together with a linearity in energy response better than 1% above 50
MeV. A time resolution of ∼54
ps
/
E/
GeV
is also measured on samples of radiative Bhabha and
Φ decays.
The dependence of selection on an introduced mutation 1(2)M167DTS on male mating competitiveness, viability, and developmental rate of larvae and pupae of Drosophila melanogaster, heterozygous for ...this mutation, was examined in population experiments with preset conditions. The limitations of fitness parameters of individuals l(2)M167DTS/+ relative to individuals +/+ were estimated according to the conditions of the experiment and phenotypic characteristics of the mutation studied. Under conditions of limited food supply and dependence on emergence time in each generation, the sequence of female mating was shown to be of less importance than the order of medium utilization by the progeny of a certain genotype related to the male success in the first mating. The limiting factors acting on the l(2)M167DTS mutation were viability and developmental rate.
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