Download the JES-X3 Series product brochure
You can also read an in-depth published article on the history of JEOL NMR and ESR
Higher sensitivity measurement is feasible by using a Gunn oscillator which supplies a noiseless stable microwave, a TE011 cylindrical cavity with a high Q-value, a large sample volume, and a modulation coil capable of obtaining a homogeneous magnetic field. The ESR spectrum below, obtained for Tempol/ Benzene solution (1 uM), by using a 100 kHz modulation frequency, clearly shows a guaranteed sensitivity of 5.0x109 spins/0.1 mT.
In order to obtain data with excellent reproducibility, a stable and linear magnetic field is necessary. To obtain a stabilized static magnetic field, the JES-X320 employs a Hall element with good linearity, and the entire Hall element is thermally controlled to guarantee a magnetic field stability as high as 5 x 10-6 / 0C・h. The high stability shown is 100 times superimposed ESR spectra of perylene cation radical with ±0.1 mT magnetic field sweep in one hour measurement.