Electron Paramagnetic Resonance Spectroscopy

Electron Spin Paramagnetic Resonance (EPR) is a powerful nondestructive and nonintrusive analytical method. EPR produces important information regarding a sample’s structure and dynamics, and is the only method for the direct detection of paramagnetic species. EPR involves the direct measurement of unpaired electrons, and is useful in detecting radicals within a material. Applications of EPR can range anywhere from photosynthesis research to drug detection to the kinetics of radical reaction

ESR measurements can be used for:

Brüker EMX EPR


Band Microwave X-band solid state bridge, 200 mW leveled source output, AFC stability of 10-6, automatic AFC gain control, 4 mHz AFC dynamic range, 1dB attenuation with .5 dB precision, 60 dB max attenuation.
Magnet Ten-inch magnet and 2.7 kW power supply with Hall Field Controller of operating range 100G-10kG.
Field accuracy Field accuracy of better than 800 mG over the full operating range, sweep with setting in 100 mG steps and resolution of 2 mG.
Tuning Automated tuning and cavity matching. Automatic calibration of phase and amplitude for any frequency in the specified frequency range, phase resolution of 0.1 degrees, first and second harmonic.
Cavity High sensitivity cavity (ER 4119 HS)
High Temperature Cavity
Optical Excitation Cavity
High Pressure High Pressure accessory with dielectric resonator for ESR studies at pressures up to 4GPa
Accessories Aqua X cell
Electrochemistry – Volta lab
Photochemistry – several lasers and fibre optic
Complete liquid helium/ liquid Nitrogen low temperature accessory (3.8-300K)
High temperature unit for temperature up to 1000K
X-ray Excitation ESR
An array of miscellaneous items to design and conduct special experiments


Settings for experiments are sample specific. Staff will help you to find the right parameters for your experiments.

or more information, contact Dr. R. Sammynaiken.