Radiation Detection & Measurement

Ion pairs are created when ionizing radiation interacts with the detector gas.

• True

• False

The following are all components of a gas-filled detector EXCEPT

• receptacle walls

• pulse

• electrodes

• high voltage power supple

In a gas-filled detector, as voltage increases, ion pairs also increase.

• True

• False

The 6 regions of the Gas Amplification Curve for gas-filled detectors are: (choose all that apply)

• Recombination & Ionization

• Reorganization & Ionization

• Geiger-Mueller & Continuous Discharge

• Proportional & Limited Proportional

• Geiger-Mueller & Continuous Meter

An ion chamber can discriminate between types of radiation.

• True

• False

A detector that completely surrounds the source and views the source from all angles is known as __________ geometry.

• 3 pi

• 2 pi

• pi

• 4 pi

The time from the initial pulse until the detector can produce another pulse is

• resolving time

• dead time

• recovery time

The process of detecting ionizing radiation by the emission of light, which is produced when radiation excites an atom in the detector and then returns to a stable state.

• scintillation

• semiconductor

• efficiency

• photomultiplier

Disadvantages of Semiconductor detectors are: (choose all that apply)

• shorter response time and more linear response than Nal scintillation detector

• must be cooled for operation

• lower efficiency than Nal scintillation detector

A measure of how many pulses occur for a given number of disintegrations.

• Detector Geometry

• Gamma Spectroscopy

• Detector Efficiency

• Radioactive Decay