absorption coefficient

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Noun1.absorption coefficient - a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substanceabsorption coefficient - a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber; "absorptance equals 1 minus transmittance"
coefficient - a constant number that serves as a measure of some property or characteristic
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References in periodicals archive ?
The schematic diagram of apparatus for measuring the sound absorption coefficient is shown in Supporting Information Fig.
Caption: Figure 2--curves of sound absorption coefficient values versus frequency between LENR and other commercial products
Values of absorption coefficient were taken between 10 to 103 cm-1.
Figure 5 shows a comparison of the absorption coefficient of nucleic acid, chromophoric amino acids, and dipicolinic acid weighted by their typical concentration versus wavelength.
where [E.sub.1[+ or -]](z) and [E.sub.2[+ or -]](z) are the complex amplitudes associated with the circularly polarized components of the transmitted waves beams; [E.sub.3[+ or -]](z) and [E.sub.4[+ or -]](z) are the amplitudes of the self-diffracted waves; [alpha](I) is the irradiance dependent absorption coefficient; [J.sub.m]([[PSI].sup.(1).sub.[+ or -]]) stands for the Bessel function of order m; z is the thickness of the nonlinear media; and [[PSI].sup.(0).sub.[+ or -]] and [[PSI].sup.(1).sub.[+ or -]] are the nonlinear phase changes.
Parameters Ge Si Melting point [T.sub.m] [K] 1210 1685 Density [rho] [kg/[m.sup.3]] 5323 2329 Thermal Conductivity k [W/cm x K] 0.6 1.56 Absorption coefficient [alpha] 5 x [10.sup.4] 1 x [10.sup.3] [cm [conjunction]-1] Specific heat capacity [C.sub.p] 310 700 [J/kg x K] Parameters [Si.sub.x][Ge.sub.1-x] Melting point [T.sub.m] [K] 1210 + 244x + 231[x.sup.2] Density [rho] [kg/[m.sup.3]] 5323-2495x-499[x.sup.2] Thermal Conductivity k [W/cm x K] 1/1.67+ 48.97x - 50[x.sup.2] Absorption coefficient [alpha] 5 x [10.sup.4] -4.9 x [10.sup.4]x [cm [conjunction]-1] Specific heat capacity [C.sub.p] c(T) [J/kg x K]
The capillary absorption coefficient increases with the rise of RCA replacement percentages; such as, the capillary absorption coefficient of RAC-33%, RAC-66%, and RAC-100% is about 1.08, 1.14, and 1.28 times as high as that of NAC.
The calculated [B.sub.abs] average value was 16.59 [Mm.sup.-1] (SD = 17.23 [Mm.sup.-1]), and its temporal variation strongly correlated with that of [BC.sub.tr] (r = 0.98) and moderately correlated with that of HOA (r = 0.68) (Figure 3(b)), which suggests that the absorption coefficient is mainly determined by traffic-related exhaust.
Radiative transfer calculations maybe performed at every point in the jet (for a range of frequencies/energies, at every location) [12], providing the relevant emission and absorption coefficients. In such cases, finally a line of sight integration may derive synthetic images of jet [gamma]-ray emission, at the energy-window of interest [12,13].
Top: absorption percentage (A%); middle: drug apparent absorption coefficient ([P.sub.app]), and bottom: absorption rate constant ([K.sub.a]).
Table 1 Sound absorption coefficient (SAC, [alpha]) comparison between OPT natural fiber, Mesocarp fiber, Arenga Pinnata, paddy fiber and date palm fiber.
where absorption coefficient of the isotopologue i of gas g, is [k.sup.i,g].