Track for ejected tracer particles and the path of tracer particles for a delayed-jet model. B11 ﹩\beta ﹩ 0.25 (upper) and two prompt models, B12 ﹩\beta ﹩ 1.00 (medium) and B12 ﹩\beta ﹩ 4.00 (lower), are illustrated in different spacial scales. Each particle is labeled by ﹩{Y}_{{\rm{e}}}﹩ at the end of NSE. The central filled (yellow) circular area describes the neutrino-sphere.