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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:04 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
SEM investigations of CR-39 and mica-biotite solid state nuclear track detectors
Authors:
C. Costea1, O.G. Duliu2, A. Danis3, S. Szobotka4
Affiliation:
1 Geological Institute of Romania, 1 Caransebes Street, 012271 Bucharest, Romania
2University of Bucharest, Department of Atomic and Nuclear Physics, P. O. Box MG-11, 07125 Magurele (Ilfov), Romania
3National Institute for Physics and Nuclear Engineering – Horia Hulubei, P. O. Box MG-6, 07125 Magurele (Ilfov), Romania
4National Institute for Geoecology and Marine Geology, 23-25, Dimitrie Onciul Street, 024053, Bucharest, Romania
E-mail
duliu@b.astral.ro
Keywords:
Abstract:
By means of four different Scanning Electron Microscopy (SEM) techniques we have investigated the trace distribution of fission fragments on a mica muscovite as well as alpha particles on a cellulose acetate CR-39 solid state nuclear trace detectors (SSNTD). Both measurements were used to determine the absolute age of the manganese nodules. All images reveled with clarity the typical parallelogram-like traces of mica muscovite as well as the characteristic circular shape of cellulose acetate traces detectors. In all cases, the corresponding image histograms were used to select the best images acquisition technique.
Therefore, in the case of mica detector, both back scattered topographic and combined images presented a comparable contrast, while in the case of the cellulose acetate the secondary electrons image showed the best contrast. This finding recommends SEM as an appropriate method to be used in conjunction with SSNTD investigation of the absolute geochronology of polymetallic nodules.
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