Multiple choice

Which of the following statements is true regarding the sensitivity of Electron Spin Resonance (ESR)?

  1. ESR sensitivity increases with increasing temperature and decreasing magnetic field.

  2. ESR sensitivity increases with increasing temperature and increasing magnetic field.

  3. ESR sensitivity increases with decreasing temperature and increasing magnetic field.

  4. ESR sensitivity increases with decreasing temperature and decreasing magnetic field.

  5. The sensitivity does not depend on temperature and magnetic field.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This answer is correct as we can see from the expression n1/n2 = e(-2µH/kT) that sensitivity of the instrument is greatly enhanced by using a high magnetic field and lowering the temperature.

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