The EPR laboratory
Electron Paramagnetic Resonance (EPR/ESR) spectroscopy is a unique technique for identifying radicals and other paramagnetic substances.
The Laboratory is equipped with 3 spectrometers (BRUKER) and home build sample holders (cavities) permitting X (9.5 GHz)- and Q (35 GHz)-bånd EPR, ENDOR (Electron Nuclear Double Resonance) and EIE (Endor Induced EPR) detections in the temperature interval 4 K - ca 400 K.
The operation of the laboratory is a collaboration between the Physics Department (UiO) and IMBV (UiO). The laboratory is a part of the Physics Department, in the research group Biophysics and Medical Physics (BMF), located in the 3rd floor in the Chemistry building.
BRUKER EleXsyS 560 SuperX (10"/2.6kW magnet/power supply)
- X-band EPR/ENDOR-spectrometer.
- SuperX dispersion type X-band microwave bridge with 200 mW power leveller (60 dB att.) (max. 600 mW with leveller off),
- low- and high-frequency modulation frequency units.
- DICE ENDOR system (one DDS only).
BRUKER EleXsyS 560 SuperX (10"/12kW magnet/zero-crossing power supply)
- X- and Q-band EPR/ENDOR/TRIPLE-spectrometer.
- SuperX X-band microwave bridge with 200 mW power leveller (60 dB att.)(max. 600 mW with leveller off).
- ER 050 Q-band bridge,
- ER 5106-E low-temperature EPR/ENDOR cavity
- ER 4118 CF Liquid helium cryostat
- HP 53152 45 GHz frequency counter.
- the low- and high-frequency modulation frequency units
- DICE ENDOR system (two DDS's).
The following accessories are available for the two EleXsys 560 systems :
- 2 * XSophe-Sophe EPR simulation suites
- NMR Teslameter (plug-in for both systems)
- 2 * ER 4122 SHQE SuperX High-sensitivity cavities
- 4 * standard (TE102) rectangular cavities
- 2 * BRUKER ENDOR cavities
- The BRUKER Dual-Mode cavity and the BRUKER TE104 double rectangular cavity.
- The 100-600K ER4131VT EPR-ENDOR variable temperature control unit with transfer lines and glassware.
- ER 4113 HV Liquid Helium control systems 1.9-300 K (OXFORD ESR910) and 3.8-300 K (OXFORD ESR900). Controllers, pumps, flow meter and transfer lines
- AIR PRODUCTS helium refrigerators (3) with controllers, transfer lines, flow meters etc.
- ENI 3100L,3200L and Amplifier Research 150A220 rf-amplifiers (for ENDOR)
- The programmable goniometer ER 218PG1 for crystal studies
- Home-made X-band and Q-band EPR/ENDOR cavity/vacuum shrouds systems for in situ X-irradiation and measurements at liq. helium temperature.
- A variety of flat-cell accessories for aqueous solution and spin trapping experimets
- In addition, a Phillips X-irradiation 100kV generator and side-window X-ray tubes (Cr and W) is available in the lab, and X-diffraction (Weissenberg, Cu or Mo tubes) capabilities in nearby labs.
BRUKER e-SCAN EPR/alanine dosimetry table-top spectrometer
The following accessories are available:
- HP dx2000 (2.8 MHz, 1 GB) desktop computer
- Alanine dosimeter pellet inserts - low-dose and Xlow-dose
- Alanine film dosimeter inserts - low-dose and high-dose
- Irradiated food insert with g-marker