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On the platform of NMR magnet Varian 7300 scientists from the Laboratory for magnetic resonances RBI put together an X-band EPR spectrometer in the continuous (CW) working mode. It has been financed from the own project resources: MZO (MZO (dr. sc. Boris Rakvin), HrZZ project-SPES (dr. sc. Marina Ilakovac Kveder) and EU structural funds project AVACS (coordinator for RBI is dr. sc. Marina Ilakovac Kveder). The value of the instrument is more than 1.500.000,00 kn (the last purchase, the magnet power supply, costed about 800.000,00 kn) as the spectrometer is equipped beside the magnet also with the microwave bridge, the source of microwaves, cryostat, allowing liquid helium temperature, as well as with various resonator cavities. This spectrometer is unique in Croatia as it allows to gain magnet induction of 1.9 T and has large magnetic sweep, especially important for studying metal centres in (bio)materials. These characteristics secure the possibility to upgrade the spectrometer to higher EPR frequencies in the future, like Q-band, which is a standard in the characterization of materials.

General instrument information

Short name
Bruker EMX
Inventory number
Services list
Array; Array
kapitalna (> 132.722,81 EUR / 1.000.000 HRK)
Instrument type
Analysis type
detektiranje ionizirajućeg zračenja , eksperimentalna analiza , fazna analiza , spektroskopska analiza , strukturna analiza
analiza kemijske veze , modeliranje , određivanje dinamičkih svojstava , određivanje strukture , određivanje strukture i/ili faznog sastava , radijacija , analiza uzoraka
Standalone or bound
Equipment condition
potpuno funkcionalan
Biologija , Fizika , Geofizika , Kemija
Year of manufacture
Acquisition date
Financing body
Ministarstvo znanosti i obrazovanja Republike Hrvatske , Hrvatska zaklada za znanost , Europska komisija
External link


EMX Bruker CW EPR spektrometar
Bruker, Varian
Operating and measuring scope
X-band, ca 10 GHz
Principle of work
In EPR spectroscopy one detects the absorption of microwave radiation when the energy of microwaves equals the energy splitting between the energy levels of unpaired electron spin in the magnetic field.
Detailed technical characteristics
EPR spectrometer has been put together by the efforts of the members of the Laboratory for magnetic resonances, RBI, using the platform of Varian 7300 NMR magnet. It is an CW EPR spectrometer working in the X-band, but it is possible to upgrade it in the future to the Q-band frequency region.;magnetic field induction of 1.9 T can be achieved with the large magnetic field sweep, cryogenic temperatures including liquid helium temperature can be achieved
Additional equipment
various resonator cavities, cryostat, temperature unit
Purchase price
1500000 HRK
Remote work


Bijenička 54

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