An Electron-spin-resonance Spectrometer for Use While Irradiating Wet Biological Systems
- 1 January 1963
- journal article
- research article
- Published by Taylor & Francis in International Journal of Radiation Biology and Related Studies in Physics, Chemistry and Medicine
- Vol. 7 (2) , 155-160
- https://doi.org/10.1080/09553006314551001
Abstract
By taking electron-spin-resonance spectra at 300 Mc/s, rather than at the usual 10 000 Mc/s, the dielectric effect of any water that may be contained in a sample is greatly reduced, and much ‘wetter’ systems can therefore be studied without the necessity of using very small samples. Useful sensitivities are available at this frequency, and the instrument described has a sensitivity of 5 × 1015 spins of crystalline DPPH. The spectrometer can also be used with a suitable x- or gamma-radiation source to enable spectra to be taken during irradiation. Some examples of the growth and decay of free radicals in irradiated wet seeds are given to show the possibilities of the instrument.Keywords
This publication has 4 references indexed in Scilit:
- The Sensitivity of Microwave Electron Spin Resonance Spectrometers for use with Aqueous Solutions†Journal of Electronics and Control, 1963
- An Electron Spin Resonance Cavity for the Detection of Free Radicals in the Presence of WaterNature, 1963
- Sensitivity Considerations in Microwave Paramagnetic Resonance Absorption TechniquesBell System Technical Journal, 1957
- Electron Spin Resonance Absorption in Metals. I. ExperimentalPhysical Review B, 1955