Difference between revisions of "NucPhys I HomeworkProblems"
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Revision as of 18:34, 8 April 2008
Chapter 2
Set 1
1.) In your own words, describe what the "Standard Model" of physics is using 2 to 5 paragraphs. Your paragraphs should include the concepts of the 4 fundamental forces of physics, QED, and QCD at a minimum. Any sentences in which a string of 5 or more words match a sentence that is found on the internet will be evidence of cheating.
2.) Solve the Schrodinger equation for the following potential:
. Assume particles are incident from , don't try to normalize but do express the wave function in terms of one coefficient.
Set 2
1.) Given the following barrier potential
show that the transmission coefficient is
when
Assume particles are incident from
and .Set 3
1.) Starting with Shrodinger's time-independent equation, derive the wave functions for a 2-D simple harmonic oscillator. Your derivation should take advantage of separation of variables and you are not required to normalize the wave function.
Set 4
1.) Show that the mean-square charge radius of a uniformly charged sphere is
2.) Using the definition of the form factor
and probably an integral table, calculate whena.):
b.)
c.)
Set 5
1.) a.) find the binding energy difference between O-15 and N-15
b.) compute the nuclear radius of O-15 and N-15 assuming the above binding energy is due to the coulomb energy.
2.) Muonic X-rays
a.) Calculate the energies of muonic K-line X-rays from Fe assuming a point nucleus and using a one-electron model..
b.) Calculate the energy correction
due to the finite nuclear size.3.) Find the binding energy using the semi-empirical mass formula for
a.) Ne-21
b.) Fe-57
c.) Bi-209
d.) Fm-256
4.) Find the neutron separation energies for
a.) Li-7
b.) Zr-91
c.) U-236
5.) Find the proton separation energies for
a.) Ne-20
b.) Mn-55
c.) Au-197
Set 6
1.) Assume a neutron may be described as a proton with a negative pion
in an orbital state.What would be the orbital magnetic dipole moment of this system
?2.) Assume that the proton magnetic moment is due to the rotational motion of a positive spherical uniform charge distribution of radius
spinning about its axis with angular speed .a.) Integrate the charge distribution to show that :
(hint:
)b.) show that
using the classical relationship between angular momentum and rotational speed for the spin.
Set 7
1.) Solving the transcendental equation for the deuteron
a.) Assume the 3-D square well approximates the deuteron system such that the well width is 2.2 fm. Using boundary conditions show that
where
and
- : bound state
b.) Rewrite the transcendental equation for the deuteron in the form
and show that
when R = 2 fm.
- Use the reduced mass for the deuteron system.
c.) Solve the transcendental equation for
using an iterative technique.- I got x = 3.93xxxxxx
Set 500
5.) Several nuclei decay by the emmission of an alpha particle. An alpha particle (He-4) is a tighlty bound nuclear containing 2 protons and 2 neutrons in which the energy needed to remove one neutron is 20.5 MeV. One model for this decay process views the alpha particle as being bound to the nucleus via a spherical potential well.
Once outside the nucleus, the alpha particle is repelled via Coulombs law
The original nucleus had a charge
and the alpha particle has a charge .Use the WKB approximation to show that the transmissivity (T : transmission coefficient) is:
- Media:GamowFormula.pdf Gamow's formula
where
- and and .