Abstract:
One of main requirements in applied nuclear physics is the need of a detector capable of detecting and
di erentiating di erent particles. Thus, the ssion products from a 252 Cf radioactive source, after about 12 half-life
periods of alpha decay, are registered using virgin and annealed CR-39 polyallyldiglycol carbonate (PADC) lms. In the
case of virgin CR-39, a single peak appears corresponding to the heavy group of these products, while the other peak
related to the light group is obscured. The annealed CR-39 detectors, on the other hand, were demonstrated to be highly
sensitive to the ssion fragments, and as a result we have observed the characteristic twin peaks of ssion fragments from
that radioactive source.
