Mj. Given et al., PRELIMINARY-RESULTS OF COMBINED THERMO-LUMINESCENCE AND THERMALLY STIMULATED CURRENT MEASUREMENTS ON AN ADDITIVE FREE POLYETHYLENE, Radiation physics and chemistry, 45(1), 1995, pp. 3-8
Citations number
8
Categorie Soggetti
Nuclear Sciences & Tecnology","Chemistry Physical","Physics, Atomic, Molecular & Chemical
Samples of additive free low density polyethylene have been irradiated
at -180 and -130 degrees C with 1 keV electrons. The sample arrangeme
nt was such that simultaneous measurements of thermally stimulated dis
charge currents (TSDC) and luminescence (TL) were possible and these t
echniques were used to observe effects of surface charge relaxation. T
he resulting spectra were similar in some respects to those obtained b
y other workers using either higher electron energies, which create bu
lk charges, and higher irradiation temperatures, or using X- or gamma-
radiation to create internal charge. In particular some of the TL peak
s in the spectra obtained by the present authors were observed in simi
lar regions and a current reversal seen in the TSDC spectrum obtained
at the higher irradiation temperature (-130 degrees C) was also observ
ed by another worker but for material irradiated at above room tempera
ture. The current reversal is most likely to be associated with charge
movement in the bulk rather than across the sample surface.