Echo Detected and Fourier Transform EPR
In Echo-Detected and FT EPR, microwave pulses are used to drive electronic transitions as the magnetic field is swept. This is in contrast to the more commonly used continuous wave EPR techniques.
Double Electron-Electron Resonance
DEER, also known as PELDOR or Pulsed ELDOR, uses two separate microwave frequencies to examine the coupling between two electron spins in order to make a distance measurement, typically between two nitroxide spin labels.
Electron Spin Echo-Electron Nuclear DOuble Resonance
In ESE-ENDOR experiments, nuclear transitions are driven directly using an RF pulse and the effect on the detected echo is monitored as a function of the frequency of the RF pulse.
Electron Spin Echo Envelope Modulation
In ESEEM experiments, the modulation of the echo intensity as a function of the delay between the microwave pulses is monitored. This modulation is due to the coupling between the electron being probed and nuclei within the system.
2D HYperfine Sub-level CORrElation
2D HYSCORE is essentially a two dimensional ESEEM experiment in which correlation is transferred from one electron spin manifold to another.
There are two simple experiments that can be used to give a good indication of T1 and T2, which are the Inversion Recovery experiment and a 2P ESEEM measurement.