Thimble chamber walls-calibration of an ionization chamber

Assignment Help Other Subject

Reference no: EM13299666

1. Ionization chambers if not sealed require their readings to be corrected for temperature and pressure because:

A. Walls of the chamber expand and shrink with temperature

B. The collecting electrodes electrical conductivity changes

C. The volume of the air changes

D. Mass of the air in the chamber changes

2. Thimble chambers are used to calibrate radiation beams because:

A. These are sturdy

B. They have good spatial resolution

C. They do not significantly perturb the beams

D. All of the above

3. Thimble chamber walls:

A. Are made from high Z atomic number material

B. Need be very thick

C. Are air-equivalent

D. Are made of ferromagnetic material

4. Parallel-plate ionization chambers are primarily used to measure:

A. Ionization at deeper locations in a phantom

B. Surface dose

C. Scattered radiation dose

D. Interstitial dose

5. Which of the following is not a desirable characteristic of an ionization chamber:

A. Energy independence

B. High signal to noise ratio

C. Change in sensitivity with the direction of the incident beam

D. Reproducibility

6. Calibration of an ionization chamber means it has been:

A. Exposed to radiation to stabilize

B. Compared against a national standard to establish a correction factor

C. Tested against leakage and electrical shorts

D. Made waterproof

7. An electrometer is an instrument used to measure:

A. Charge, current

B. Voltage, resistance

C. Capacitance

D. AIl of the above.

Reference no: EM13299666

Questions Cloud

Calculate the residual for the data point : One pair of data in this sample is (2,5). That is to say HT of 2 inches has 5 INQ. Calculate the residual for the data point, i.e., calculate the difference between the observed inquiries and the predicted inquiries.

Previous administrations and education department officials : Previous administrations and education department officials attest to the fact that a big number of licensed teachers are working abroad as domestics. In 1998, for instance, then President Fidel Ramos launched a program to lure back teachers who had ..

Primary muscle involed performing leg extension exercise : What are the primary muscle(s) involved when performing a leg extension exercise? Which of these statements is NOT true of strength training for women? Which of the following sequences would best represent a typical schedule for a serious weight trai..

Considered offers and not invitations to offer for businesse : Discuss what problems could arise if advertisements were considered offers and not invitations to offer for businesses - give examples and be specific. Do you think this is a good thing or a bad thing?

Thimble chamber walls-calibration of an ionization chamber : Calibration of an ionization chamber means it has been: Ionization chambers if not sealed require their readings to be corrected for temperature and pressure because: Thimble chamber walls:

test the null hypothesis HO : Suppose that we wish to test the null hypothesis H0 that the proportion p of ledger sheets with errors is equal to .05 versus the alternative Ha , that the proportion is larger than .05, by using the following scheme.

Pursue carrer in imaging-treatement and dignostic technology : Why have you decided to pursue a carrer in imaging, treatement and dignostic technology and what sources of carrer information did you study to make your decision?

Which are used to treat heart failure : Which are not a treatment for stroke? Which are used to treat heart failure?

Why do you think entrepreneurs need to be good marketers : why do you think entrepreneurs need to be good marketers

User Account

All Pages