Physics H133: Problem Set #12
Here are some hints, suggestions, and comments on the problem set.
Remember to give a good explanation, no longer than
- Q14T.5: How would Eq.~(Q14.18) look like for proton emission?
From which principle was this equation derived?
- Q14T.6: Review p. 252.
- Q15T.4: How are U and Pu bombs different in their explosion
Chapter Q14 and Q15 Problems
- Q14B.8: What is a Bq? See Eq. (Q14.25).
- Q15B.4: Adjust T so that the average thermal kinetic energy
is enough to overcome the Coulomb barrier between the two
- Q15B.6: To make a stable nucleus radioactive, one needs to change
the N/Z ratio, add enough nucleons to make it unstable against
alpha decay, or excite a nucleon to a higher energy level.
Are these likely with electrons, alpha particles or gamma rays?
Remember that weak interaction processes have a low probability
of occuring and a gamma ray photon is absorbed only if the energy
is just right and even then the excited level has to last long
enough. Now consider neutrons.
- Q14S.2: Again, see Eq. (Q14.25).
- Q14S.7: Apply the ideas from Section Q14.1.
- Q15S.6: How much energy per hydrogen atom does solar fusion yield?
How much energy has the sun radiated over its 5 billion
year lifetime? Assume that the rate of energy production
has remained constant over this period.
- Q15S.4: (a,b) Just plug in the given numbers into the scaling laws
and evaluate the corresponding radius of devastation.
(c) Interpret the numbers you obtained.
Your comments and
suggestions are appreciated.
Physics H133: Hints for Problem Set 12.
Last modified: 06:25 am, April 29, 2012.