a=
1/2inceh
z
5
inches
ro = 3/5 inch
b = (6 - 2/1) inches
where 1/u is the mean-free-path of gamma radiation
in lead.
K was evaluated by means of numerical integra-
tion for values of E (and corresponding values of
b) at 200-kev intervals between O and 2 Mev and at
3 Mev (Fig. 8).
oe
The absolute photon intensity is a combination of these
various correction factors,
i.e.:
I = AC/vwi
A graph of I/A versus E is snown in Fig. 9.
After reading
the energetically appropriate I/A from the graph, the number
was multiplied by the area of the total absorption peak of
the corresponding gamma ray to obtain absolute photon inten-
sity of that line.
RESULTS
The absolute photon intensities with their estimated
errors are listed for each gamma line of each record in
Tables
2 and
3.
The abbreviated sample notation used for
19