Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1980-07-02
1982-08-31
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29460, 264274, 264277, 264275, 264279, B23P 300, B23P 2500, B29B 300, B29F 110
Patent
active
043465110
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 neutron-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.
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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.
Glenn Hugh W.
Jackson Frank H.
Moon Charlie T.
The United States of America as represented by the United States
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