# Difference between revisions of "NucPhys I HomeworkProblems"

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c.) Au-197 | c.) Au-197 | ||

+ | |||

+ | == Set 6 == | ||

+ | |||

+ | 1.) Assume a neutron may be described as a proton with a negative pion <math>(\pi^-)</math> in an <math>\ell =0</math> orbital state. | ||

+ | |||

+ | What would be the orbital magnetic dipole moment of this system <math>(s_{\pi} = 0)</math>? | ||

+ | |||

+ | 2.) Assume that the proton magnetic moment is due to the rotational motion of a positive spherical uniform charge distribution of radius<math> R</math> spinning about its axis with angular speed <math>\omega</math>. | ||

+ | |||

+ | a.) Integrate the charge distribution to show that | ||

+ | |||

+ | : <math>\mu = \frac{1}{5} e \omega R^2</math> | ||

+ | |||

+ | b.) show that | ||

+ | |||

+ | :\mu = \frac{e s}{2 m} | ||

+ | |||

+ | using the classical relationship between angular momentum and rotational speed for the spin. | ||

== Set 500 == | == Set 500 == |

## Revision as of 17:02, 10 March 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 nuetron 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

b.) show that

- \mu = \frac{e s}{2 m}

using the classical relationship between angular momentum and rotational speed for the spin.

## 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 .