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produced in tha soil, 22 you aosum3s that tho racicnctivity, theo
.
beta radiation, aftsccticed nranaviily tho top contimetoe
£ the teo
S011 sursaco as At vould bofove 2t sank du ruch with vonchiny
rainfall, it works
ont that tho
total CS39 in this ono
or soil is the Unitod Statas is of the erder ef
one red.
This is fren all veerons tests.
Gf magnitude.
contimoter
macnituto of
This is gust on orces
It cerents on the sell vate of loaching, and so
on, and one can get move dain grom the published
data.
The extovnal cama pociation waich is rot confined nearly
So close to tho gadionstive Isotescs Locarso it i5 mova ponstrnating has boon at
tha lovel cf theoo foevt above tho ground; that
is radiation of heman belnss of the order of magnitude cf the
total of 6.1 rad, toval Geso to date.
PROM TI) FLOOR: What is tho sqvare aroa?
DR, DUDLEY:
Tho vad is a unit of dese which is inéosondent
of aroa--cnerzy dissipation of per gran per matter.
n
It is
throughout the contimoter an averasza of about one ra
4
3
waders
ably more on ths mattor of
natural vadiation and hanmard lovoels,
Lnterpretation of what those numbors mean from him.
I would like
to emphasize rad, and that is all ia m ooinz to Say about exte2rne:
Gamma radiation.
I am going to talk
bout tha vracicactiva stronL.
«
foe
~
taumns Waich ara mora khavardors than t ®ne dsoteves,
2
«.
“
+.
It- is pessible
to dstect the radicnctive strontiuna with vory sensitive toannicut
and many measuroments have
boon mids in tho United States on the