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Ch 4 Rad Protection
Radiation Monitoring
| Question | Answer |
|---|---|
| ____ is the amount, rate and distribution of radiation emitted from a source of ionizing radiation | Dosimetry |
| ____ is a device used to detect and measure exposure to radiation. | Dosimeter |
| A ____ is an individual who plans optimal radiation treatment dosage patter for radiation therapy. | dosimetrist |
| A dosimeter is required whenever radiation workers are likely to receive ___% or more of the annual occupational EfD limit of 50 mSv (5 rem)/year. | 10 |
| Head, neck and eyes receive ___ - ___x more exposure than protected trunk. | 10-20 x |
| Four different types of personnell monitors? | film badges, pocket ionization charmbers, optically stimulated luminecence dosimeters (OSL)and TLD. |
| Film badges contain a series of filers made of ____ and ____. | aluminum; copper |
| What the range of sensitivity of film badges? | 10 - 500mrem |
| Advantages of film badges? | inexpensive, permanent legal record of exposure and can monitor beta, gamma and x-ray. |
| Film badges are accurate only at ___ mrem or higher. | 10 |
| For film badges, ___ = dose is below the minimum. | M |
| OSL dosimeters uses ___ ___ detector stimulated by a laser beam. | aluminum oxide |
| OSL releases energy as a ___ ___. | visible light |
| OSL dosimeters can be worn for up to ___ months. | 12 |
| OSL dosimeters are sensitive to 1 mrem and up to 1000 rem for ___ and ___ radiation. | x-ray; gamma |
| Pocket Ionization Chambers are accurate for _ to ___ mR. | 0; 200 |
| Pocket ionization chambers are ____ sensitive. | most |
| Pocket ionization chambers can give ____ readings. | immediate |
| TLD's can be worn up to ___ months and then reused. | 3 |
| ____ are more sensitive and accurate than film badges (5mrem). | TLD's |
| TLD's can be very ___ and provide no permanent record. | expensive |
| THree basic types of field survery instruments: | ionization chambers, geiger-mueller counter and proportional counter |
| Ioniztion chamber (cutie pie) collects ions in a chamber filled with ___ and ___. | helium; argon |
| Ioniztion chambers are sensitive to _ mR to ___ R per hour. | 1; 1000 |
| A ___ gives an audible alert if there is any contamination from radioactive isotopes. | geiger-mueller counter |
| A geiger-mueller counter will ____ alpha, beta and gamma radiation. | detect (rather than measure) |
| A ____ counter can distinguish between alpha and beta radiation. | proportional |
| A scintillation counter is sensitive to ___ and ___ radiation. | x-ray; gamma |
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