Energy Uncertainties of Charged Particles with Respect to the Density Error and Range Straggling in Nuclear Emulsion Sheet

抄録

Alpha particle tracks resulting from the decay of natural radioisotopes have been used as a reference for the energy calibration of charged particles in nuclear emulsion sheets. The suitable number of alpha tracks to yield the minimized mass error of the double hypernucleus calculated from kinetic energy errors, which related to the density errors of emulsion layer, was determined. The results showed that at least 150 alpha tracks were sufficient to utilize in the calibration. The kinetic energy error from range straggling was also determined and was one order great- er than that from the density error of emulsion layer.