Podcast
Questions and Answers
What factors affect the pulse size in gas filled detectors?
What factors affect the pulse size in gas filled detectors?
- Medium between the source and detector, source strength, distance from the source
- Type of radiation, energy of radiation, source strength
- Applied voltage, distance from the source, type of gas
- Energy of radiation, applied voltage, type of gas (correct)
What happens to the pulse magnitude with higher ionizing radiation?
What happens to the pulse magnitude with higher ionizing radiation?
- It decreases due to recombination of ion pairs
- It increases due to higher applied voltage (correct)
- It decreases due to higher applied voltage
- It increases due to recombination of ion pairs
What is added to the gas in a gas filled detector to prevent continuous discharge inside the detector?
What is added to the gas in a gas filled detector to prevent continuous discharge inside the detector?
- Absorbing filters
- Quenching materials (correct)
- Thermal insulation materials
- Aperture collimators
What region is characterized by a transitional region to the Geiger-Mueller region in a gas filled detector?
What region is characterized by a transitional region to the Geiger-Mueller region in a gas filled detector?
What increases the pulse or current seen on the output of a gas filled detector?
What increases the pulse or current seen on the output of a gas filled detector?
What happens when the ionization in a gas filled detector occurs but some ion pairs recombine before reaching the electrodes?
What happens when the ionization in a gas filled detector occurs but some ion pairs recombine before reaching the electrodes?
What is a key advantage of using an ionization chamber for dose rate measurements?
What is a key advantage of using an ionization chamber for dose rate measurements?
What is a limitation of generally using ionization chamber detectors?
What is a limitation of generally using ionization chamber detectors?
What should be done if the count rate exceeds 50,000 ncpm when frisking with a pancake GM detector?
What should be done if the count rate exceeds 50,000 ncpm when frisking with a pancake GM detector?
What is a procedure for handling a discrete radioactive particle (DRP) found during frisking?
What is a procedure for handling a discrete radioactive particle (DRP) found during frisking?
What should be done to verify if a radioactive particle has been isolated with tape?
What should be done to verify if a radioactive particle has been isolated with tape?
Why are ionization chambers less sensitive to low radiation levels compared to other detectors?
Why are ionization chambers less sensitive to low radiation levels compared to other detectors?
What is the criteria for verifying a smeared location to be posted as an Alpha Level 2 or 3 Area?
What is the criteria for verifying a smeared location to be posted as an Alpha Level 2 or 3 Area?
What is the threshold criteria for verifying an alpha frisker to be available and post as require alpha frisking?
What is the threshold criteria for verifying an alpha frisker to be available and post as require alpha frisking?
What should be done if the βγ/α Ratio is greater than 30,000 or between 30,000-300?
What should be done if the βγ/α Ratio is greater than 30,000 or between 30,000-300?
What type of electrodes are utilized in Self-Reading Pocket Dosimeters (SRPD)?
What type of electrodes are utilized in Self-Reading Pocket Dosimeters (SRPD)?
What happens to the charge as the ion chamber in the SRPD is ionized?
What happens to the charge as the ion chamber in the SRPD is ionized?
What instrument is proportional to the dose received in an ion chamber?
What instrument is proportional to the dose received in an ion chamber?
