Continuous-wavelength radiation

A richer pattern of intensity variations k seen if continuous wavelength radiation is used. In thk case, due to divergence or convergence of the diffracted beams at the boundaries, losses and gains in intensity are observed. 

Carrying the analogy between the photochemistry of Fe(C0)ij and Fe(C0)3[l,4-Me2N4] one step further we note that both compounds (25,26) behave as photoassisted olefin hydrosilation and isomerization catalysts. One distinction between the two catalyst systems is the latter (26) operates effectively with long wavelength radiation, Table II. Hydrosilation activity requires continuous photolysis ... 

The properties which we require from an ideal source in UPS is good monochromaticity, defined by a line width better than 100 meV, high intensity and continuous wavelength selectivity. Unfortunately only synchrotron radiation together with a suitable monochromator offers us all these features. The rare gas discharge lamps or, alternatively, monochromators with continuum or many-line sources have generally been used hitherto, but have certain disadvantages. 

Why does IR spectroscopy require radiation containing continuous wavelengths while Raman spectroscopy requires a monochromatic source ... 

An infrared spectrometer essentially consists of a source of continuous infrared radiation, a means for resolving the infrared radiation into its component wavelengths, and a detector. The procedure that is involved in recording the IR spectrum of a sample can be represented mathematically by the following equation ... 

The electron capture process is followed by X-ray and/or Auger electron emission, in which the vacancy in the atomic shell is filled up with an electron from an external shell. As a consequence of the interaction between the nucleus and the electron or positron, a very weak electromagnetic radiation of continuous wavelength distribution (called internal brems-strahlung) is also always present in the radioactive P and EC decay (Petterson 1965). 

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