Radiant energy – Invisible radiation responsive nonelectric signalling
Patent
1988-11-22
1990-02-13
Fields, Carolyn E.
Radiant energy
Invisible radiation responsive nonelectric signalling
2504731, G01T 102
Patent
active
049009354
ABSTRACT:
A method is presented to scan fission tracks in solid state track recording material that provides a high degree of accuracy. Three separate methods of estimating true track density are used, each in its range of greatest reliability. The first method for low track density directly observes tracks and counts them. The second method for ranges of medial track density uses the Buffon needle method of determining the probability of track pile up to determine true track density. The third method, which is applicable at high track density, measures the amount of transmitted light to determine the opaque track area and relates this to true track density. The three methods are complimentary to each other and one of the set is automatically applied to any measured areal unit. The method is applied with known apparatus.
REFERENCES:
patent: 4385237 (1983-05-01), Drukaroff et al.
patent: 4536841 (1985-08-01), Wacchter et al.
Robinson et al, "A Novel Track Etch Technique for Neutron Measurements", Proceedings 5th International Betatron Sym., Bucharest, Rumania, Oct. 18-23, 1971, pp. 497-503.
Somogyi et al, "Alpha Radiography With Plastic Track Detector", Int. J. App. Rad. and Isotopes, 22, 1971, pp. 289-299.
Gold Raymond
Roberts James H.
Bergman Keith S.
Fields Carolyn E.
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