Most probable charge of fission products in 24 MeV proton induced fission of238U

The charge distributions of fission products in 24 MeV proton-induced fission of ${}^{238}\mathrm{U}$ were measured by the use of an ion-guide isotope separator on line. The most probable charge ${(Z}_p)$ of the charge distribution was discussed in view of the charge polarization in the fission process. It was found that $Z_p$ mainly lies on the proton-rich side in the light mass region and on the proton-deficient side in the heavy mass region compared with the postulate of the unchanged charge distribution. The charge polarization was examined with respect to production $Q$ values.