An automated system for track measurement for the employment of CR-39 as alpha spectrometer in radon and its daughters monitoring

  • J. C. Hadler
  • P. J. Iunes
  • S. R. Paulo


In this work we studied an automated analysis of alpha particle tracks in CR-39, by employing a MITAKA photo-microdensitometer with a C1522 HAMAMATSU Image Analysis System. This system can be used to measure track diameters (with a nominal precision of 0.8 μm), superficial track density, and track darkness. This information can be used to determine the alpha particle energies and also their incidence angles (azimuthal and zenithal). The performance of such an automated system, to analyze CR-39 samples which were exposed to alpha particles of known energies, was studied, comparing its response with measurements performed manually by experienced microscopists. The experimental results indicate that the MITAKA/HAMAMATSU system is very reliable for alpha track analysis in CR-39, making possible its use to perform time-consuming measurements in microscopy, as in the case of radon and its daughters surveys.


Radon Incidence Angle Automate System Automate Analysis Particle Energy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    G. SOMOGYI, S. A. SZALAY, Nucl. Instr. Methods, 109 (1973) 211.CrossRefGoogle Scholar
  2. 2.
    M. ZAMANI, S. CHARALAMBOUS, Nucl. Tracks Radiat. Meas., 11 (1986) Nos 1 and 2, 35.CrossRefGoogle Scholar
  3. 3.
    J. C. HADLER, N. P. J. IUNES, A. M. OSORIO, A. S. R. PAULO, Nucl. Tracks Radiat. Meas., 19 (1991) 313.CrossRefGoogle Scholar
  4. 4.
    J. C. HADLER N., P. J. IUNES, A. P. POLICASTRO, S. R. PAULO, Performance of the Alpha Spectrometer CR-39 Versus Etching Time and its Possible Application in Radon/Thoron Discrimination — present Conference.Google Scholar
  5. 5.
    J. H. ADAMS Jr., Nucl. Tracks, 4 (1980) 67.CrossRefGoogle Scholar
  6. 6.
    F. ABU-JARAD, M. A. ISLAM, A. QUE, Nucl. Tracks Radiat. Meas., 19 (1991) 233.CrossRefGoogle Scholar
  7. 7.
    R. L. FLEISCHER, L. G. TURNER, A. C. GEORGE, Health Phys., 47, No. 1 (1984) 421.Google Scholar
  8. 8.
    G. BIGAZZI, J. C. HADLER, S. R. PAULO, Nucl. Instr. Methods, A280 (1989) 506.Google Scholar
  9. 9.
    J. C. HADLER, N. P. J. JUNES, A. M. OSORIO, A. S. R. PAULO, Nucl. Instr. Methods, A313 (1992), Nos 1 and 2, 290.Google Scholar

Copyright information

© Akadémiai Kiadó 1994

Authors and Affiliations

  • J. C. Hadler
    • 1
  • P. J. Iunes
    • 1
  • S. R. Paulo
    • 1
  1. 1.Depto. de Raios Cósmicos e Cronologia, IFGWUniversidade Estadual de CampinasCampinas(Brazil)

Personalised recommendations