Radiant energy – Invisible radiation responsive nonelectric signalling – Luminescent device
Patent
1979-07-05
1981-08-25
Willis, Davis L.
Radiant energy
Invisible radiation responsive nonelectric signalling
Luminescent device
250486, H05B 3300, G01T 100
Patent
active
042861659
ABSTRACT:
A personnel dosimeter includes a plurality of compartments containing thermoluminescent dosimeter phosphors for registering radiation dose absorbed in the wearer's sensitive skin layer and for registering more deeply penetrating radiation. Two of the phosphor compartments communicate with thin windows of different thicknesses to obtain a ratio of shallowly penetrating radiation, e.g. beta. A third phosphor is disposed within a compartment communicating with a window of substantially greater thickness than the windows of the first two compartments for estimating the more deeply penetrating radiation dose. By selecting certain phosphors that are insensitive to neutrons and by loading the holder material with netruon-absorbing elements, energetic neutron dose can be estimated separately from other radiation dose. This invention also involves a method of injection molding of dosimeter holders with thin windows of consistent thickness at the corresponding compartments of different holders. This is achieved through use of a die insert having the thin window of precision thickness in place prior to the injection molding step.
REFERENCES:
patent: 3399301 (1968-08-01), Schayes et al.
patent: 3761710 (1973-09-01), Yamashita et al.
Gesell et al., "A Personnel Beta-Dosimetry Method for Reducing Energy Dependence", IDO-12090, Mar. 1979.
Charles, "The Development of a Practical 5 mg cm.sup.-2 Skin _Dosimeter", Proc. Fifth International Conf. on Luminescence Dosimetry, Sao Paulo, Brazil, Feb. 14-17, 1977.
Boren Paul R.
Jones Donald E.
Parker DeRay
Denny James E.
Fields Carolyn E.
Glenn Hugh W.
Jackson Frank H.
The United States of America as represented by the United States
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