| Issue |
J. Phys. IV France
Volume 129, October 2005
|
|
|---|---|---|
| Page(s) | 249 - 252 | |
| DOI | https://doi.org/10.1051/jp4:2005129051 | |
J. Phys. IV France 129 (2005) 249-252
DOI: 10.1051/jp4:2005129051
Photoacoustic and EPR investigation of gamma irradiated alanine samples
A. Sikorska1, B. Ciesielski2, N. Ponikwicki1 and K. Schultka21 Institute of Experimental Physics, University of Gdansk, 80-952 Gdansk, Poland
2 Department of Physics and Biophysics, Medical University of Gdansk, 80-211 Gdansk, Poland
Abstract
In this work, alanine polycrystalline samples irradiated
by 
radiation were examined in UV-VIS spectral region by
the use of photoacoustic spectrometer with a microphone registration. The
observed spectral band has been assigned to one type of free radicals which
are known to be produced in the crystalline alanine by ionizing radiation.
The number of these radicals was concurrently controlled by the use of EPR
method. Increase of the photoacoustic peak at 345 nm with increasing
radiation dose was observed for a wide range of doses. For the highest dose,
the shape of the obtained PA spectrum evidently changed, probably due to
contribution from other type of molecular debris. Reasonable agreement
between results of photoacoustic spectrometry and EPR was proved.
© EDP Sciences 2005