Q. The pulses having amplitudes between the two triggering levels are given by which of the following components?

View solution

Q. The difference between the pulses having amplitudes between the two triggering levels is called __________

View solution

Q. Which of the following is the function of the discriminator?

View solution

Q. A discriminator circuit is which of the following circuits?

View solution

Q. Photomultipliers used in Liquid scintillation detectors are a source of instability.

View solution

Q. A quench curve can be constructed by plotting the counting efficiency versus ____________

View solution

Q. Due to the presence of red, green and yellow colour in the vial, which of the following occurs?

View solution

Q. Variation of gain with temperature does not cause instability.

View solution

Q. In which type of quenching, the radiation emitted by the isotope is not detected due to absorption of the radiation by the sample itself?

View solution

Q. Which of the following is not a type of quenching?

View solution

Q. The reduction in counting efficiency of the scintillation detector is called as __________

View solution

Q. In liquid scintillation counter, which of the following is used to convert light into electrical signals?

View solution

Q. When UV light is absorbed by the fluor molecules the light emitted is in which of the following colours?

View solution

Q. In liquid scintillation counter, which of the following is a fluorescent substance?

View solution

Q. Straight bore collimator is used for thyroid work in the medical field.

View solution

Q. Which of the following is known as a scintillation counter?

View solution

Q. Gamma camera uses which of these components to produce a position intensity picture of a radioactive area?

View solution

Q. Gamma camera uses one scintillation detector.

View solution

Q. Which of the following components adds all the signals and determines where each scintillation event occurred in the detector?

View solution

Q. When the energy of an absorbed gamma photon is released, a flash of light is produced. This is similar to which of the following effects?

View solution