Te He.
(5)
where "I* is the dose in roentgens, “W* is the yield in megstons, and. "a" and "t* are defined as before, - This equation follow, of course,
from aseunption (4). The form (5) is not convenient for calculation,
since in the construction of a trajectory for « falling particle onc is
concerned only vdth the tims the partielle spends in a stratum character=
ised by a fixed wean wind, It is ecnvenient then to introduce Stoke's
law and to solve equation (5) for the fall rate "v",
3
rAf 2 =
‘The result is
(5a)
where "K_" ia the constant 4000/5625, "h" is the starting heipht in fect
entthenut of "y* 1s feet per hour.
«a
Stz An
The tims spent in a civen stratus
7
(6)
wad etructure were never very 312-
static hedorragh.
ered little frem those mide from the
The dynamic system does, however, have the capatility
of handling a rapidly changing situation should it appear.
The fall-cut forecasting systems described above have a larco mumber
would Bope to rapove by tho next
ude a good representation
{
shots.
The
whether area or volumes of a particle is sore
sigificant for the
Geposition of astixity should be investigated. 4 careful estimato of
the heizht distribution of the activity should Se made. Same attenticn
should also be given to the effects of finite lateral cloud dimensions
and to the spreading of the cloud. These cre points which will refine the
syutonm,