Behavior of projectile fragments of 1.88 GeV/nucleon 56Fe.

Abstract

The projectile fragments from 1.88 GeV/nucleon $^{56}\mathrm{Fe}$ collisions with light (CR-39 plastic) and heavy (Cu) nuclei were analyzed in a CR-39 chamber with spacers. No decay of projectile fragments in space was observed. No anomaly was clearly observed for interactions, of projectile fragments in the CR-39 chamber. The overall normalized cross sections ${\ensuremath{\sigma}}^{\mathrm{*}}$ was 1.13\ifmmode\pm\else\textpm\fi{}0.07\ifmmode\pm\else\textpm\fi{}0.06 in CR-39 for projectile fragments emitted by collisions of $^{56}\mathrm{Fe}$ with Cu and CR-39 targets, though ${\ensuremath{\sigma}}_{\mathrm{CR}\mathrm{?}(\mathrm{h}\mathrm{y}39{}^{\mathrm{*}}(6\mathrm{\ensuremath{\le}}\mathrm{z}\mathrm{\ensuremath{\le}}11}$) of 1.42\ifmmode\pm\else\textpm\fi{}0.25\ifmmode\pm\else\textpm\fi{}0.13 was obtained for projectile fragments of lower charge (6\ensuremath{\le}z\ensuremath{\le}11) from light target nuclei (CR-39).