Nuclear Fission

The splitting of a nucleus into two smaller fragments

Sr

Xe14354

9038

U23592

gamma

gamma

nn

Critical mass of 5 kg givesHuge Explosion

Nuclear Fusion

The combining of small atomic nuclei to produce

larger ones

+ + + +

H He n Energy21 2

31

4 10H+ + +

+ +

Nuclear Fusion

• This is the reaction taking place on the sun• We have duplicated it in hydrogen bombs• No earthly materials will contain it • Produces huge amounts of energy• Fusion of 1g of hydrogen = 20 tons of coal• Temperature can reach up to 50,000,000 C• 2/1 H is very plentiful and easy to obtain• Helium is inert and biologically stable• Much work is being done on this reaction

Greatest hazard½ life of 28 yearsWe get it through milk and vegetablesIs incorporated in our bonesProduces internal radiation for years

Sr9038

Greatest hazard½ life of 28 yearsWe get it through milk and vegetablesIs incorporated in our bonesProduces internal radiation for years

Greatest immediate threat½ life of 8 daysproduced in the largest amount by atomic explosionsConcentrates in the thyroid gland

Sr9038

I13153

G rea test haza rd½ life o f 28 yea rsW e ge t it through m ilk and vege tablesIs inco rpora ted in ou r bonesP roduces in ternal radia tion fo r yea rs

G rea test im m ed ia te threa t½ life o f 8 daysp roduced in the la rgest am oun t by a tom ic exp los ionsC oncen tra tes in the thyroid g land

½ life o f over 30 yearss im ilar to po tassium and m im ics it in the bodyem its ga m m a rays

S r9 03 8

I1 315 3

C s1 3 75 5