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PAGE 2
GASSEN
As the result of ingenious experimentation and clever theorizing, it has been
ly dgronstratos thit aters consist of a very sucll slectrically positive
.
:
iq
a3
sgyucled surrounded by s definite pattern o7 electrically negative cherge coupesed ef
ae,
For muny years it was thought that the,
we
mucned cons
onsisted
ef
of protons (hydreger)
in 1922 it has bean conclusively
nuclei} andd electrons, but “ith the ciscovcery 9! neutrons as
prevel that the atomic nucleus
1S]
neeles scen ¢£9 ogee’ oiectron
Xp ained by a&
f
3 compesed of protons und newLLPGS «
The fact that the
c
ta cacay
has been tentatively
in t he sc-called process of beta
nhc not at
process involving concepts
t10 easy te describe to ths »minitiated.
4. Tan
This explanation scculres a massless, or almost massless, partici: which has been called
autringl,
¥
eisetion of
igs
tmesonsé (heavy electrons) has
of the Cecp unknown, at which point we might
Aaplropriately cake have we finvliy indivisibility or oll the process continue?
Kenovhee.as therm
scem to by too nr netfusdamentall
“SUL wna entiv eirt of the lest
exci. Loy Lacap mesa and pacibive chore,
66 tevsente
fois, pobrtively a c2i
aiuh £9 rodbem cosh!
wer thes
vere very
coneunts of
bo ecusenbreates and ccémie snesisgs of differmt nuclesr messes
Lisotoces) could be soparoted.
\
This aitviition woe sadiewthy chomged ly the aisecvery "nat certain nuclei covig
abeoch fe llrcis ard brotk uj
up into other nuclei and neutrons.
more than ome
It vas cuickiy
neutron could be obtained from the " fission" started by one neutron.
This
Oper ¢ up the tremendous possibility cf£ +tthe "chain raaction" which has become a reality
ae.
g inuist ry
.
wil effects tae bie dinuus
Nuclear rhrsies sudd enly emerged from the
44
muciear atomic toexb
mage
with miny applications te medicine end biology
e described by my collcagves in this series of lectures.
In my following lecture detet a of the prcceases of emission of alvna, beta
and famme reys will
ffi bbe
radia
described.
sion dubesting srd measuring
ct
!
;
SeAsctrons.
A description of the principle of operetion of
deviece wili olso be civen.
rc