Physics · Nuclear Physics
Nuclear radiation emitted from a 60Co radioactive source is detected by a photomultiplier tube (PMT) coupled to a scintillator crystal. Which of the following statements is correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A mu-metal shield is placed all around the PMT to nullify the effect of external magnetic fields.✓
- 2A mu-metal shield is placed all around the PMT to nullify the effect of external electric fields.
- 3β radiation from 60Co source interacts with the scintillator crystal, producing γ radiation, which will hit the photocathode of the PMT and produce a signal.
- 4γ radiation from 60Co will directly hit the photocathode of the PMT without interacting with the scintillator crystal and produce a signal.
Correct answer
A mu-metal shield is placed all around the PMT to nullify the effect of external magnetic fields.
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