an WeDLedesicnea? count-rate meter.
Tnis count-rate
meter has 7 scales ransing in sensitivity from 10 counts
per second full scale to 1000 counts per second full
scale.
Tne output of the count-rate meter controlled the
¥Y coordinate of a Noseley Lutorraf X-Y plotter, while the
X coordinate was varied by tne base line bias of the
analyzer.
A modification in the form of e@ potentiometer
in series with the X input allowed fine adjustments {fo be
made in matching pulse heignt to particular lines on the
recording paper.
A sypical recording made by the X~Y¥
recorder is shown in Fis. 2.
Tne regulated hizh-voltase supply for the photomulti-
plier tube was constructed from a UCRL design.
PHOCZDUTS
The fallout samples were supplied by Project 2.6.3
in 3/4-inch in diameter by 2-inch in length polystyrene
containers each containing approximately 50-1000 microcuries total activity.
-
gample,
Descriptive information about each
tne effective fallout area it represents, and its
associated shot is listed in Tablel?
Samples were obtained from 2 types of collectors.
Tho
cloud sample consisted of material caugnt on a filter paper
through which a representative samole of air was drawn as
an aircraft flew throush the cloudfollowingthedetonation,
*
The tables ooverr at the end of the
6
text.