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- W1756974291 abstract "Publisher Summary This chapter describes the measurement of density by beam absorption and scattering. The fields of plasma physics, astrophysics, and all of chemistry use absorption and scattering of optical radiation as primary diagnostic methods. Radiation may be directed at a sample of matter from a source of such small extent that it may be considered a point source. It is found that when a beam passes through a sample of matter, its interaction with the matter depends on the density and the constitution of the matter, and somewhat on the temperature, as well as on the content of the beam. The types of interaction are roughly classified as absorption, scattering, and reradiation. Negative absorption, or amplification, is an important type of interaction that leads to laser sources. It is observed that because the sources of penetrating radiation are seldom monochromatic and the exponential like attenuation of the radiation puts great stress on detectors in their need to serve over many orders of magnitude, the method of attenuation densitometry turns out to be used only under special conditions where other methods fail. Achievement of reliability and high accuracy requires careful attention to the problem of scattered radiation reentering the beam." @default.
- W1756974291 created "2016-06-24" @default.
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- W1756974291 date "1981-01-01" @default.
- W1756974291 modified "2023-09-27" @default.
- W1756974291 title "3.1. Beam Attenuation Densitometry" @default.
- W1756974291 cites W2051123292 @default.
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- W1756974291 doi "https://doi.org/10.1016/s0076-695x(08)60872-8" @default.
- W1756974291 hasPublicationYear "1981" @default.
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