P570, #14 alpha decay 24096Cm = 23694Pu + 42He

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Presentation transcript:

P570, #14 alpha decay 24096Cm = 23694Pu + 42He 25299Es = 24897Bk + 42He 261107Bh = 257105Db + 42He

4419K = 4420Ca + 0-1e 5926Fe = 5927Co + 0-1e 14156Ba = 14157La + 0-1e P570, #16 beta decay 4419K = 4420Ca + 0-1e 5926Fe = 5927Co + 0-1e 14156Ba = 14157La + 0-1e

P578, #30 HALF LIFE T1/2 (n) = Tt 32.5 (n) = 32.5 n= 1 110 (n) = 330 n = 3 2.7 (n) = 5.4 n = 2

P578, #32 HALF LIFE T1/2 (n) = Tt Sodiium-24 has a half-life of 15 h. A sample starts with 12 mCi. What is left after one half-life 12/2 = 6 mCi After 30 hrs. 12/2/2 = 3 mCi After 2.5 days x24 hrs = 60 hrs 60/15 = n =4 12/2/2/2/2 = 0.75 mCi

P578, #34 HALF LIFE T1/2 (n) = Tt Flourine -18 has a half-life of 110 min. A sample starts with 100 mg. What is left after one half-life 100/2 = 50 mg After 5.5 hrs x60 min = 330mins 330/110 = n =3 100/2/2/2/ = 12.5 mg

P584, #40 Nuclear chain reaction A neutron hits a uranium that splits and emits 3 more neutrons that hit other uraniums: when the density of uranium is at critical mass they all split at the same time

#42 Nuclear Fission 23592U + 10n g 94Sr + __+3 10n 13954Xe

#44/ # 70 Fission vs fusion X X Fission Fusion High temperatures to start X No radioactive waste Hydrogen fuel Large amounts of energy released Chain reaction X Control rods

13755Ce g 13756Ba + 0-1e P589, #66 Nuclear Reactions 90 / 30 = 3 12955Cs half life = 30 yrs Total time = 90 yrs 16 mg= original 90 / 30 = 3 16 g 8 g 4 g 2 mg