TASLE 5.1 = Total Enersy Response Factors for AN/POR-37A
F
.
Specttrum Shape
Total hesponse Factor
F
SSRTS SES EESSE
1° Shot k (h-L) H+ 5.3 Lays
d
1.17
|
(Fisure yl)
|
Shot 1 (2-1) H+ U.1 Days
1.96
Shot 1 _ L) H
(Figure 4.3)
2 Days
1,12
Shot 1 (1-L) H 94 Nours
Leak
(Figure h.2)
|
(Fieure 4,2 of Referenca 16)
lo
1
‘
{
4
4
4
5,2 CEOMETRY RESPONSE
is
The response of the instrument is known to vary also with the -;
aan chee
direction of incidence of the flux, tut no allowance was made for this:
factor in keference 16, An attempt has been made te correct for this .
effect by using the plots shown in Figure 5.2,
This figure, taken
from Reference 10, is a graphical representation of the directional
- response to a lO-ng Radium source of a J1B instrument in the horizontal
and in two vertical planes, It was felt to be sufficiently accurate
to make the approximation shown in the graph by setting a straight line
Linit to the response vector in one revion and, further, to assume that
the response is cylindrically synnetric about the XX! axis,
Maxinum
sensitivity, indicated by a vector length of unity, is then in the ok
direction cn the XX' axis, If a flux (F) per unit solid angle impinges
on the instrument at an angle 0 with respect to OX', the reading on the
meter will be (assuming that the response is linearly proportional to
flux intensity):
Dit = rD= rkF
wheres
(5.3)
k= proportionality constant
b= "true" air-dose
r = vector response factor
By the above approximation, the vector response factor (r) is
given by:
+:
h=0.6 sec 0
r=1
(5.4)
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q
A
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0£O<s costil = 73