PRIVACY ACT MATERIAL REMGVED
inexperienced personnel] and with a minimum of auxiliary equipment.
In the latter part of 1947 QQ of the Naval
Research Laboratory published a report on the coloration by X-rays of
crystals of several compositions.
This method seemed to offer possibilities
of fulfilling the need outlined above.
Although this work was in the
most preliminary phases of development it seemed advisable tdipaquest
thet a project be proposed to test this method of measuring radiation
dosage.
Therefore, the project was submitted ani approved along with
other Bureau of Ships projects.
When apvroval was received steps were taken to obtain suitable
crystals for the purpose.
eeleewas contacted though security
considerations did not permit disclosure of the immediate purpose for
which the crystals were desired, a tentative promise of about one
hundred crystals was received.
The crystals which had been tested previous to this project were
comparatively bright in color.
It was believed that if sufficiently
large crystals were grown, adequate coloration could be produced for
visuel checking of doses.
These materials are subject to fading when
exposed to ultra-violet light, therefore it was necessary to package
the crystals in a small aluminum tube.
Because of the limited time
available no calibration was feasible prior to departure from Washington.
The following materials are included for test in this project;
sodium chloride, lithium fluoride, potassium chloride, and potassium
bromide.
The crystals are approximately 2 inch square and 3 inches long.
In their natural state they are clear em! colorless but upon exposure
to radiation they absorb various bands of the spectra, giving the
Sébition
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