Q4(c). Detection of X-rays; types of X-ray detectors
How are X-rays detected? Explain the various types of X-ray detectors.
Answer in brief
By what the photon does to matter: it ionises a gas, makes a phosphor emit light, creates electron–hole pairs in a semiconductor or blackens a film. Types: photographic, gas-filled, scintillation and semiconductor detectors.
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CoversX-ray detectorsproportional counterGeiger–Müller counterscintillation counterSi(Li) detectorphotographic film
All parts of Question 4
- 4(a) Plate height; number of plates from a chromatographic peak10 marks
- 4(b) Interferences in flame photometry and their elimination10 marks
- 4(c) Detection of X-rays; types of X-ray detectors10 marks