2. a) A gas filled detector can be operated in a variety of modes. Draw a diagram showing the variation in electric...
2. a) A gas filled detector can be operated in a variety of modes. Draw a diagram showing the variation in electrical pulse size as a function of the applied voltage, indicating the main regions of use 14) b) Name four factors that determine the region in which a gas filled detector will operate. 12) c) If a 1.5 MeV particle is completely absorbed within a gas filled ionisation chamber, calculate the expected ionisation current per unit activity (in A/Bq) generated. The average energy deposited per ion pair in gas may be taken as 30 ev 14)
2. a) A gas filled detector can be operated in a variety of modes. Draw a diagram showing the variation in electrical pulse size as a function of the applied voltage, indicating the main regions of use 14) b) Name four factors that determine the region in which a gas filled detector will operate. 12) c) If a 1.5 MeV particle is completely absorbed within a gas filled ionisation chamber, calculate the expected ionisation current per unit activity (in A/Bq) generated. The average energy deposited per ion pair in gas may be taken as 30 ev 14)