Absorption coefficient decadic

The quantity e is called the absorption coefficient or extinction coefficient, more completely the molar decadic absorption coefficient it is a characteristic of the substance and the wavelength and to a lesser extent the solvent and temperature. It is coimnon to take path length in centimetres and concentration in moles per... 

Magnetic dipole moment of a molecule m, fJL Molar (decadic) absorption coefficient e... 

The (decadic) absorption coefficient a(X) is the absorbance divided by the optical path length, l ... 

Naperian absorption coefficient Decadic absorption coefficient Molecular energy Viscosity... 

The molar decadic absorption coefficient e is frequently called the extinction coefficient in published literature. Unfortunately numerical values of the extinction coefficient are often quoted without specifying units the absence of units usually means that the units are mol-1 dm3cm-1. See also [18]. The word extinction should properly be reserved for the sum of the effects of absorption, scattering, and luminescence. 

Molar (decadic) absorption coefficient L moF cm Molar (decadic) absorption coefficient m mol 0.1 -... 

Example 3-9 The (decadic) absorption coefficient aH20=eH2oXCHp of pure water at the wavelength 2, of 172 run is ca. 550 cm (Weeks et al., 1963). Calculate the penetration depth of the 172 run radiation into water under conditions of total absorbance (Aio = 2). 

The relation between the absorption cross section and the molar (decadic) absorption coefficient, e, (units cm ) is... 

Depth of penetration (of light) The inverse of the absorption coefficient. The SI unit is m. If the decadic absorption coefficient, a, is used, the depth of penetration (1/a) is the distance at which the spectral radiant power, Px decreases to one tenth of its incident value, P . If the Napierian absorption coefficient, a, is used, the depth of penetration (1/a = p in this case) is the distance at which the spectral radiant power decreases to 1 /e of its incident value. 

Molar absorption coefficient, molar decadic absorption coefficient Absorbance divided by the absorption pathlength, I and the concentration, c ... 

Decadic) absorption coefficient Absorbance (base 10 or base e) Absorbed... 

The quadratic effect of an externally applied field on the absorption coefficient is described by the imaginary part of the third-order susceptibility -o) a),0,0). influences the molar decadic absorption coefficient of the solute. The absorption coefficient in the presence of the field is a quadratic function of the applied field strength (118),... 

Here, A is the (decadic) absorbance e represents the molar (decadic) absorption coefficient, customarily expressed in dm /mol cm, equivalent to 1000 cm /mol c stands for the concentration in mol/dm and I for the thickness of the sample in cm. These definitions are not strictly in accordance with SI standards. Nevertheless, they are used in this book, because millions of data in these units are published. The transmittance or transmittance factor is given by r = /[Pg.17]

In these equations, d is the sample thickness, e is the molar decadic absorption coefficient and c stands for the concentration. For pure samples, e-c should be replaced by a, which is the linear decadic absorption coefficient of the sample. For a black body radiator, the emission factor is ejf = 1. 

Actually existing emitters are not black bodies. More realistic values may be calculated according to the Planck-Kirchhoff law, Eqs. 3.3-4 to 3.3-8. Table 3.4-4 shows typical molar decadic absorption coefficients for infrared absorption bands of character-... 

Table 3.4-4 Infrared molar decadic absorption coefficients e. for vibrations of typical organic molecules (Jones and Sandorfy, 1956)...

In conventional Raman spectroscopy Raman spectra are recorded from colorless samples with exciting radiation in the visible range of the spectrum. In this case, the absorption of the exciting and Raman radiation by the sample is at its minimum, and the linear decadic absorption coefficient (a = e c) is of the order of 10 -. ..10cm. ... 

Figure 3.5-3 Linear decadic absorption coefficient of H2O, D2O, Ethanol, and Cyclohexane in the near infrared region. Insertion range of the Raman spectrum, excited by the NdrYAG laser with radiation of A = 1064 nm.

In the region of NIR FT Raman spectroscopy, at F = 5000...10000 cm , substances with X-H bonds (X = any element) show overtones and combinations of the normal frequencies. They may have considerable intensity as demonstrated by Fig. 3.5-3 with the NIR absorption spectra of liquid H2O, D2O, ethanol, and cyclohexane. The linear decadic absorption coefficient a of water at a Raman shift of about 2500 cm is of the order of 10. The transmission of a layer of d = 1 cm is given by ... 

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