Stopping Cross Section of D2O Ice.

摘要

The energy loss of protons and deuterons in D2O ice has been measured over the energy range Ep= 18-541 kev using the double focusing magnetic spectrometer to measure the energy of the particles after they have traversed a known thickness of the ice target. One method of measurement is used to determine relative values of the stopping cross section as a function of energy, another method measures the absolute values. The results are in very good agreement with the values calculated from Bethe's semi-empirical formula. Possible sources of error are considered and the accuracy of these measurements is estimated to be + or - 4 percent. jg.