Method and apparatus for the determination of electron density i

Details Method and apparatus for the determination of electron density i Method and apparatus for the determination of electron density i

1974-09-26

1976-06-01

Willis, Davis L.

Radiant energy

Coded record and readers; invisible radiant energy type

250363S, 250445T, G01N 2320

Patent

active

039611868

ABSTRACT:
A method of and an apparatus for the determination of the electron density of small volumes of a body. Two narrow beams of ionizing radiation of substantially equal intensity are subsequently directed through the small volume in two different directions. The intensity of the transmitted radiation as well as the scattered radiation along said two directions is measured extra-corporally, which measurements are employed in computing the electron density of the small volume. The employed radiation is of such high energy that the Compton effect will be the wholly dominant absorption phenomenon in the volume as well as in the radiation paths in the two mentioned directions, and that the change in the absorption cross-section from primary to secondary radiation caused by the Compton shift will be substantial.

REFERENCES:
patent: 3509341 (1970-04-01), Hindel et al.
patent: 3809904 (1974-05-01), Clarke et al.

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