About EasySpin

EasySpin is a Matlab toolbox for solving problems in Electron Paramagnetic Resonance (EPR) spectroscopy. It supplements the numerical and visualisation power of Matlab with the best computational methods devised by EPR spectroscopists.

EasySpin is freeware. To obtain the toolbox, go to the download page. Current version: 2.5.1 (4 May 2006)

Features

The main tools included are simulation functions for the following types of spectra.

Isotropic cw EPR spectra
  • one unpaired electron, arbitrary number of nuclei
  • resonance fields are exact (no perturbation formulae)
  • automatic determination of magnetic field range
Fast-motion cw EPR spectra
  • one unpaired electron, arbitrary number of nuclei
  • user provides rotational correlation time and tensor anisotropies, line widths are automatically computed
Slow-motion cw EPR spectra
  • one unpaired electron, several nuclei
  • axial rotational diffusion tensor
  • arbitrary tensor orientations
  • spin exchange
Solid-state cw EPR spectra (powders and crystals)
  • arbitrary number of electron and nuclear spins
  • all interactions, including high-order operators and nuclear quadrupole
  • resonance fields are exact (no perturbation formulae)
  • broadening models: g, A and D strain, unresolved hyperfine splittings
  • non-equilibrium populations
  • perpendicular and parallel detection mode
Solid-state ENDOR spectra (powders and crystals)
  • arbitrary number of nuclei, includes nuclear quadrupole
  • hyperfine enhancement
  • built-in orientation selection

Other features include

Contact

EasySpin is written and maintained by the EPR group at the ETH Zürich.

For bug reports, inquiries, additional examples and suggestions, contact the Before submitting bugs, download the latest version and verify them.