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Reading Decay Events With Three Energy Gates 4 questions
Reading Decay Events With Three Energy Gates
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A decay simulation produces events in three energy bands. A detector records one count for each event that passes its selected gate. Gate L records all three bands. Gate M records the middle and high bands. Gate H records only the high band. All readings use the same simulated event record.
| Gate | Counts from the first record |
|---|---|
| L | 35 |
| M | 20 |
| H | 5 |
Question 1
Which reading directly gives the high-band event count?
- 35
- 20
- 15
- 5
Question 2
Calculate the event count in each of the other two bands.
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Question 3
A student keeps only L and H. Explain why those two gates cannot recover the middle-band count without another reading.
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A model screen changes the readings to 33 on L, 20 on M, and five on H. The original event record before the screen is unchanged.
Question 4
Use all three gate readings to identify which band lost counts at the detector and how many it lost.
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