Final Exam List of Concepts

# Final Exam List of Concepts - Physics 6 Some concepts...

• Notes
• 1

This preview shows page 1. Sign up to view the full content.

Physics 6 Spring 2005 Some concepts covered since second exam Frisch & Peierls memorandum fission neutrons isotopes - 235 and 238 Uranium - separation - thermal separation chain reaction - neutrons per fission ~= 2.3 scattering - elastic, inelastic capture cross section energy - 200 MeV per breakup of U critical radius (or mass) and mean free path Other terms: isotopes, curve of binding energy, mass defect mass-energy, kinetic energy energy units: Joule (MKS system), eV, MeV, kiloton (kT) 1 .6 × 10 -19 J = 1 eV, 1 MeV = 10 6 eV, 1 kT= 4.2 × 10 12 J radiation, radioactivity, radionuclide, alpha, beta, gamma half-life, exponential decay activity = (0.69/T 1/2 ) N (N=number of decaying nuclei) activity is in units of disintegrations per second or Becquerel (Bq) Radiation units : Curies (1 Ci = 3.7 × 10 10 decays/sec, 1 decay/sec=1 Bq), Roentgens, rads, rems (see Lecture 21) If needed on the Final the radiation order of magnitude “Rules of Thumb” will be given: a. 1 gram of Ra or a 1 Ci source produces 1 R per hour at 1 meter distance; b. 1 R (of gammas) gives about 1 rem dose (1 rad is about 1 rem); but 1 R (of
This is the end of the preview. Sign up to access the rest of the document.
• Spring '06
• GaryR.Goldstein

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern