Er4122shqe

Continuous wave (cw) X−band (9–10 GHz) EPR experiments were carried out with Bruker ELEXSYS E580 and ELEXSYS E500 II EPR spectrometers (Bruker Biospin, Rheinstetten, Germany), equipped with an Bruker ER4102ST resonator, ER4122SHQE resonator, or Flexline dielectric ring resonator (Bruker ER 4118X-MD5-W1). Helium gas-flow cryostats (Oxford Instruments and ICE Oxford, UK) and an ITC (Oxford Instruments, UK) were used for cryogenic temperatures. Light excitation was done directly in the resonator with 532 nm Laser light (Nd:YAG Laser, INDI, Newport) or with a white light LED (Thorlabs).
High frequency (HF) EPR measurements were performed on a home-built D-band (130 GHz) spectrometer equipped with a single mode TE₀₁₁ cylindrical cavity.^{51 –52 (link)} D-band EPR spectra were recorded in pulse mode in order to remove the microwave phase distortion due to fast-passage effects at low temperatures. Light excitation was done directly in the cavity of the spectrometer with 532 nm Laser light through an optical fiber (Nd:YAG Laser, INDI, Newport). Data processing was done using Xepr (Bruker BioSpin, Rheinstetten) and MatlabTM 7.11.2 (MathWorks, Natick) environment. Simulations of the EPR spectra were performed using the EasySpin software package.^{53 (link)}