Optical characterisation of solar concentrator

Pa;бo;тa; пp;e;дпp;инятa; c; цe;лью пo;кa;зa;ть пo;тe;нциa;льнy;ю вo;змo;знo;c;ть иc;пo;льзo;вa;ния “пo;вe;p;хнo;c;тнo;й плe;нки” для интe;нc;ификa;ции “мe;зфa;знo;гo; тe;плo;o;бмe;нa;”. B khcy;a;c;тнo;c;ти, p;a;c;c;мa;тp;ивa;лa;c;ь вo;змo;знo;c;ть интe;нc;ификa;ции тe;плo;пe;p;e;нo;c;a; к o;тдe;льным линзa;м лe;тy;khcy;e;й зидкo;c;ти, плa;вa;ющим нa; нe;пo;двизнo;й пo;вe;p;хнo;c;ти вo;ды, и их иc;пa;p;e;ниe;. Пo;пe;p;e;мe;ннo; p;a;c;тягивa;я и c;зимa;я (c; пo;мo;щью нp;илo;зe;ннo;й извнe; c;илы) пo;вe;p;хнo;c;тнy;ю плe;нкy; нa; пo;вe;p;хнo;c;ти вo;ды вo;кp;y;г кa;здo;й линзы, o;кa;зa;лo;c;ь вo;змo;зным пe;p;иo;диkhcy;e;c;ки p;a;c;тягивa;ть и c;зимa;ть линзы, khcy;тo; знa;khcy;итe;льнo; c;o;кp;a;щa;лo; вp;e;мя их иc;пa;p;e;ния.

Nonlinear Reformulation of Heisenberg's Dynamics

A structural similarity between Classical Mechanics (CM) and Quantum Mechanics (QM) was revealed by P.A.M. Dirac in terms of Lie Algebras: while in CM the dynamics is determined by the Lie algebra of Poisson brackets on the manifold of scalar fields for classical position/momentum observables Q/P, QM evolves (in Heisenberg's picture) according to the formally similar Lie algebra of commutator brackets of the corresponding operators:

Excess noise of the silicon surface barrier detectors

From our experiments the following conclusions follow:

The physics and mathematics of the second law of thermodynamics

     

15.

Modified Kolmogorov wave turbulence in QCD matched onto “Bottom-up” thermalization     

Vladimir Khachatryan   《Nuclear Physics A》2008,810(1-4):109-141

We investigate modification of Kolmogorov wave turbulence in QCD calculating gluon spectra as functions of time in the presence of a low energy source which feeds in energy density in the infrared region at a time-dependent rate. Then considering the picture of saturation constraints as has been constructed in the “bottom-up” thermalization approach we revisit that picture for RHIC center-mass energy, W=130 GeV, and also extend it to LHC center-mass energy, W=5500 GeV, thus for two cases having an opportunity to calculate the equilibration time, τ_eq|therm, of the gluon system produced in a central heavy ion collision at mid-rapidity region. Thereby, at RHIC and LHC energies we can match the equilibration time, obtained from the late stage gluon spectrum of the modified Kolmogorov wave turbulence, onto that of the “bottom-up” thermalization and other evolutional approaches as well. In addition, from the revised “bottom-up” approach we find the gluon liberation coefficient to be on the average, ε0.81–1.06 at RHIC and ε0.50–0.56 at LHC. We also present other phenomenological estimates of τ_therm which, at QCD realistic couplings, yield 0.45–0.65 fmτ_therm0.97–2.72 fm at RHIC and 0.31–0.40 fmτ_therm0.86–2.04 fm at LHC. We show that the second upper-bounds of τ_therm in both cases are due to the late stage gluon spectrum of the original Kolmogorov wave turbulence in QCD, previously deduced with a low energy source which feeds in energy density at a constant rate. On the other hand, the lower-bounds and first upper-bounds of τ_therm are due to the late stage gluon spectrum of the modified QCD wave turbulence, deduced here at the specific time-dependent rate. In the latter case, at certain conditions, taking also into account both very small and realistic couplings we give estimates: 0.65 fmτ_therm1.29 fm at RHIC and 0.52 fmτ_therm1.16 fm at LHC, as well as at realistic couplings we find 0.53<τ_therm<0.7 fm at RHIC and 0.41<τ_therm<0.65 fm at LHC.     

16.

The extraction of total cross section from     

《Physics letters. [Part B]》2009,680(5):417-422

We report on the first measurement of the differential cross section of -meson photoproduction for the d(γ,pK⁺K⁻)n exclusive reaction channel. The experiment was performed using a tagged-photon beam and the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. A combined analysis using data from the d(γ,pK⁺K⁻)n channel and those from a previous publication on coherent production on the deuteron has been carried out to extract the −N total cross section, σ_N. The extracted −N total cross section favors a value above 20 mb. This value is larger than the value extracted using vector-meson dominance models for photoproduction on the proton.     

17.

Rotational analysis of a ²Δ-²Π system of NiF     

B. Pinchemel  Y. Lefebvre  J. Schamps 《Journal of Molecular Spectroscopy》1979,77(1):29-35

A ²Δ-²Π system of NiF has been obtained in emission from a “composite wall hollow cathode” in the blue region. High-dispersion rotational analysis has led to the following constants (in cm^?1):

Modified Kolmogorov wave turbulence in QCD matched onto “Bottom-up” thermalization

We investigate modification of Kolmogorov wave turbulence in QCD calculating gluon spectra as functions of time in the presence of a low energy source which feeds in energy density in the infrared region at a time-dependent rate. Then considering the picture of saturation constraints as has been constructed in the “bottom-up” thermalization approach we revisit that picture for RHIC center-mass energy, W=130 GeV, and also extend it to LHC center-mass energy, W=5500 GeV, thus for two cases having an opportunity to calculate the equilibration time, τ_eq|therm, of the gluon system produced in a central heavy ion collision at mid-rapidity region. Thereby, at RHIC and LHC energies we can match the equilibration time, obtained from the late stage gluon spectrum of the modified Kolmogorov wave turbulence, onto that of the “bottom-up” thermalization and other evolutional approaches as well. In addition, from the revised “bottom-up” approach we find the gluon liberation coefficient to be on the average, ε0.81–1.06 at RHIC and ε0.50–0.56 at LHC. We also present other phenomenological estimates of τ_therm which, at QCD realistic couplings, yield 0.45–0.65 fmτ_therm0.97–2.72 fm at RHIC and 0.31–0.40 fmτ_therm0.86–2.04 fm at LHC. We show that the second upper-bounds of τ_therm in both cases are due to the late stage gluon spectrum of the original Kolmogorov wave turbulence in QCD, previously deduced with a low energy source which feeds in energy density at a constant rate. On the other hand, the lower-bounds and first upper-bounds of τ_therm are due to the late stage gluon spectrum of the modified QCD wave turbulence, deduced here at the specific time-dependent rate. In the latter case, at certain conditions, taking also into account both very small and realistic couplings we give estimates: 0.65 fmτ_therm1.29 fm at RHIC and 0.52 fmτ_therm1.16 fm at LHC, as well as at realistic couplings we find 0.53<τ_therm<0.7 fm at RHIC and 0.41<τ_therm<0.65 fm at LHC.     

The extraction of total cross section from

We report on the first measurement of the differential cross section of -meson photoproduction for the d(γ,pK⁺K⁻)n exclusive reaction channel. The experiment was performed using a tagged-photon beam and the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. A combined analysis using data from the d(γ,pK⁺K⁻)n channel and those from a previous publication on coherent production on the deuteron has been carried out to extract the −N total cross section, σ_N. The extracted −N total cross section favors a value above 20 mb. This value is larger than the value extracted using vector-meson dominance models for photoproduction on the proton.     

Rotational analysis of a 2Δ-2Π system of NiF

A ²Δ-²Π system of NiF has been obtained in emission from a “composite wall hollow cathode” in the blue region. High-dispersion rotational analysis has led to the following constants (in cm^?1):

A precise study of the rotational spectrum of formaldehyde H212C17O and H213C17O

The pure rotational spectra of H₂¹²C¹⁷O and H₂¹³C¹⁷O have been investigated in the frequency region between 8 and 360 GHz in the ground vibrational state. For both isotopic species the ¹⁷O nuclear quadrupole coupling constants and spin-rotation constants have been obtained. From both Q- and R-branch transitions a set of rotational constants and several distortion constants could be derived employing Watson's formalism in A reduction. The obtained rotational constants are in Megahertz:

Nuclear physics with hyperfine methods

In this talk the discussion of nuclear physics studied by hyperfine methods is limited to a few topics of high actuality:

Pionic Kα X-ray energy and linewidth IN 20Ne and 22Ne

We have measured the energies and linewidths of the pionic K_α X-rays for ²⁰Ne and ²²Ne using a natural liquid-neon target. The results are

     

20Ne	22Ne
Neenergy (keV)	239.12±0.14	230.49±0.88
width (keV)	15.43±0.41	12.65±3.51