May 26 
May 27 
May 28 
May 29 
May 30 


Memorial Day 




what
we'll do in class 

(always done before class) 

what does the 8fold way tell us? 
what is the circumstantial evidence for quarks? what is the direct evidence? 
why is the circumstantial evidence for color? is there direct evidence? 

what
to prepare for class 
can
you find the triangle hidden in the meson octet? the bowlingpin decuplet? what shapes will these diagrams if we add a fourth quark? a fifth? 

homework (by 5 pm) 







was "removed" I need you to returnin questions 15, 16, 17 from lab E2 (on paper is ok) 







May 19 
May 20 
May 21 
May 22 
May 23 







what
we'll do in class 
measure and record on bubble chamber sheet all your
h's and c's i will check in class, so make sure you bring this to class; it counts for a grade 
quiz
on all nuclear physics (chapters 1314) and conservation laws (part of chapter 15) bring notes, textbook, handouts, old homework, old labs bring cyclotron handout 
finish discussion of particle accelerators 

(always done before class) 
new: 15(2,4) 

handout on Particle Accelerators (pick up from the black box), up through the end of cyclotrons check claims made in the article; jot down questions if you don't understand a claim 
handout on Particle Accelerators (pick up from the black box), up through the end of cyclotrons check claims made in the article; jot down questions if you don't understand a claim 

inclass
presentation 
see
below 
do
you have one ready?? 

homework (by 5 pm) 

do these on the back of your bubble chamber sheet 1) derive, on your own, using simple geometry, the relationship between r, h, and c 2) starting with a magnetic force diagram and net force equation, show that for a particle with electric charge q in a magnetic field B p = qBr where p is the relativistic momentum and r is the radius of the circle in which it moves 3) Show that pc (in Gev) = k r(cm) and find the numerical value of k in Gev/cm for the magnetic field given on the page people in Singapore, can you email me this? 
1) consider the electron to be a sphere of charge find the equatorial rotational speed if it has a spin angular momentum of "1/2" hbar we know that the size of the electron is < 10^{18} m 2) calculate all the r's and pc's for your particles on the bubble chamber sheet AND measure all relevant angles (on your bubble chamber paper of course) you might also want to calculate the E's for the particles you can identify 





the identities of alpha, beta, Q, Z 






May 11 
May 12 
May 13 
May 14 
May 15 







what
we'll do in class 
finish
nuclear fission: leftover questions: what are the three main ways we can separate one isotope of U from another? be able to explain the physics of how these methods work! critical mass.... why do we need one? why can't any mass do it? why is cadmium used for control rods? 
leftover questions on fission: where did the rest of the energy (the book said 200 Mev were released per fission).... the 3 examples presented in class were nowhere near 200 Mev!! where is the rest of me? we already have one method of separating the 2 uranium isotopes: 1) diffusion (U235 will move faster than U238 if they are in a gas at the same temperature) we need 2 more methods!! also the control rod question from yesterday talk about fusion: questions to know the answer to before coming to class: 1) why is fusion more difficult to initiate than fission? how do we humans solve that problem? (how does the sun solve it?) 2) why is fusion more difficult to sustain than fusion? how do we address that problem? 3) how can we estimate the temperature required for fusion? 
bring your particle books (that you ordered from the Particle Data Group) to class questions to know the answer to before coming to class: 1) why is fusion more difficult to initiate than fission? how do we humans solve that problem? (how does the sun solve it?) 2) why is fusion more difficult to sustain than fusion? how do we address that problem? 3) how can we estimate the temperature required for fusion? 
bring your particle books (that you ordered from the Particle Data Group) to class 

(always done before class) 
also, 14(3) and the end of 14(2) 

you've already read 15(4) 15(5) is new 


inclass
presentation 
since no one
did one last week, EVERYONE needs to bring this to class: energy released in one U^{235} fission done and brought to class (you have a choice of three different reactions given in the book) or make up your own! I may collect it in class Chart of the Nuclides 

homework (by 5 pm) 



an initially stationary particle p  the maximum KE is transfered when the two particles have the same mass (hint: you will need to write the KE transferred in terms of only the masses of the two particles and the initial speed of particle n) 



(presumably you picked up your top quark lab books saturday or sunday) 







May 5 
May 6 
May 7 
May 8 
May 9 







what
we'll do in class 
you
will work on radioactivity problems (TO BE HANDED IN !): from the canary sheet: 1) front side, left column: problem 43 on the wooly mammoth any two of the following: 2) back side, top left, first problem on the moon rock and K40 3) back side, top left, second problem on camping lanterns and thorium232 4) front side, right column, problem 47 on the shroud of turin as we learned yesterday, start with what the problem tells you (translate the english into an equation); perhaps add a conservation law (as we did yesterday in the Rb/Sr problem); use the radioactivity laws to solve for the unknown you can check periodically with other students that you are on the right track.... but remember that does not include looking at someone else's paper 
finish our discussion of nuclear fission see questions below 

(always done before class) 
know the 2 basic radioactivity equations know how to determine ages from radioacticity 



questions to know the answer to for class: does a single uranium fission produce the kinetic energy announced in the book? (a nice show/tell here) why does the uranium fuel have to be enriched in some reactors? why does a U235 require a slow neutron for fission? (you learned this in your first physics course!) how do you slow neutrons down? (you learned this in your first physics course!) 
inclass
presentation 
time
fro round 2 of show and tell 
do
you have one ready for today? 

homework (by 5 pm) 
and in a b^{+} decay of O^{15} 



the whole problem!!! not just the part we tried in class!! 





I am grading that this evening!! have you collected your data for lab E3?? we are taking down the radiation monitors today or monday! 




April 28 
April 29 
April 30 
May 1 
May 2 







what
we'll do in class 
finish
alpha decay and see how the KE's are apportioned between the alpha and
the daughter nucleus 
test
on chapters 12 

(always done before class) 



about beta decay 
gamma decay and decay series how is beta+ decay different than beta decay? 
inclass
presentation 
find
momentum (magnitude and direction) of the neutrino 
if
you didnt put up your results yesterday on the board, make sure that
you have them for today for some partial credit 
find mass of top quark 

homework (by 5 pm) 


tan sheet DUE BY NOON 











