Swelling in CR-39 and its effect on bulk etch-rate

A parameterization of the chemistry-normality dependence of bulk etch rate in a CR-39 detector

An empirical relationship describing the bulk etch rate is formulated. The equation involves two free fitting parameters, which reproduce the bulk etch rate for CR-39 by alpha particles at different normalities of the etching solution. The values of the fitting parameters were obtained from the experimental data. This relationship is used to predict the bulk etch rate at different normalities.

Alpha particles energy estimation from track diameter development in a CR-39 detector

The slight nonlinearity in temporal development of tracks diameter in CR-39 nuclear track detectors is examined with the aim of attempting to find if such nonlinearity can be directly related to the charged particle energy. Narrowly spaced etching time-diameter experimental data for alpha particles at five energy values and for one additional energy value etched at five different temperatures are obtained. Initial results show good indication that measuring such time-diameter relationship can form a useful energy estimation tool. Good consistency with other independent published results is obtained.

The effect of different gamma doses on some properties of a CR-39 detector

In the current study, the bulk etch rate, the removal thickness percentage and the track density have been examined for gamma-irradiated at doses ranging from 0 to 100 kGy. After irradiating CR-39 detectors, they got etched at 70°C in different concentration of NaOH solutions for various time intervals. Results indicate that the bulk etch rate and the removal thickness percentage increase with the increase of gamma absorbed dose and the etchant solution concentration. The track density increases with increase of the etchant solution concentration for irradiated samples (0, 10, 50 kGy) up to 6.25 N NaOH, and then it decreases with the increase of the etchant solution concentration for un-irradiated samples and those irradiated with 10 kGy, and with the high doses the samples' surface got damaged.