{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Assignment03wAns

# Assignment03wAns - Duke University Medical Physics Program...

This preview shows pages 1–3. Sign up to view the full content.

Duke University Medical Physics Program MP200 - Radiation Physics Fall 2010 Assignment 03 Due 10/04/10 ( Show your work for each problem. Partial credits are awarded.) 1. The integral 1 0 xe x dx has the value of (a) 0 (b) 1 2 (c) 1 (d) 3 2 (e) 2 Solution 1 0 xe x dx = e x ( x - 1) = e (1 - 1) - e 0 (0 - 1) = 1 2. A 200 keV photon interacts in soft tissue. The energy deposited locally ( in the immediate vicinity of the interaction site) most likely comes from (c) the kinetic energy of a recoil electron following Compton scat- tering.(Scattered photon will most likely deposity energy elsewhere). 3. What radiation absorbed dose of slow neutrons (RBE=2.5) is equiv- alent to a dose of 35 . 0 rad of fast neutrons (RBE = 9.0)? 1

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
4. A beam of 4 . 5 MeV neutrons is directed at a 30 g tissue sample. Each second, 1 . 5 × 10 6 neutrons strike the sample. If the relative biological effectiveness of these neutrons is 7 . 0, what biologically equivalent dose ( in rem) is received by the sample in 65 seconds ? Solution (c) 1 . 6 rem 5. A physicist wishes to measure the exposure of a beam of gamma rays. The beam is passed through 2 . 00 × 10 - 2 kg of dry air at STP. The beam produces positive ions in the air which have a to- tal charge of 3 . 87 × 10 -
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 9

Assignment03wAns - Duke University Medical Physics Program...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online