Activation energy of etching for CR-39 as a function of linear energy transfer of the incident particles

Description of the bulk etching rate of CR-39 by an extended Arrhenius-like law in increased intervalls of temperature and etchant concentration

“…It is worthy noting that the approach used in the present work allows to determine both, the partial reaction order S and the activation energy 3. Both parameters are close to theoretically expected and previously obtained values of S around 2 (Somogyi and Hunyadi, 1979;Hussein et al, 1993) and 3 z 0.8 eV (Awad and Samman, 1999;Rana and Qureshi, 2002;Hermsdorf et al, 2007).…”

“…The activation energy should have a typical value for a chemical reaction and therefore should be independent on the concentration C of the etching solution. However, numerous analysis of experimental data yield widely spreading activation energies between 0.3 and 1 eV for different concentrations of the etching solution (Awad and Samman, 1999;Rana and Qureshi, 2002) and a comprehensive comparison was published by Hermsdorf (Hermsdorf et al, 2007). Such a behaviour is demonstrated in Fig.…”

Formation and growth of tracks in nuclear track materials

“…A survey of previously reported values of the bulk etch activation energy in CR-39 detectors was given by Awad and El-Samman [53]. Their table is reproduced here as in Table 3 (with the activation energy denoted as E b ).…”

“…Since the bulk etch rate was not changed, the authors concluded that the registration temperature influenced only on the track etch rate V t . The activation energy was also introduced for studies on the etching of the tracks, which was discussed by Awad and El-Samman [53]. The reduced track etch rate was determined from the Eq.…”

Discovery of new etchants for CR-39 detector

“…The value of activation energy for aqueous NaOH solution is taken from published data (Awad and El-Samman, 1999). Higher value of activation energy indicates a greater temperature dependence of the reaction rate (Jeffrey et al, 1999).…”