Correlation between time and angular alignment in molecular dynamics simulations of heavy ion collisions

Characterization of the breakup channel in the asymmetric systems $^{40,48}$Ca+$^{12}$C at 25 and 40 MeV/nucleon

“…In conclusion, the velocity patterns (panels (b) and (c)) confirm that in the examined events the 11 C (detected or reconstructed) is the LF of the breakup process of a heavier source. c. 13 C * Finally, we apply the same analysis to the n-rich 13 C * resonances showing the results in the same manner as before in Fig. 18.…”

“…in configurations typical of the fast oriented fission, it is more neutron rich than when emitted in the opposite direction. According to the general consensus on this subject [3,5], also recently reinforced by theoretical analyses [13], the authors of the papers [6,7] interpreted the angle between the QP breakup axis and the QP-QT (QuasiTarget) separation axis (often labeled as α or θ P ROX ) as a clock of the fission process and they extracted a timescale of about 100 fm/c for the equilibration of the isospin degree of freedom within the QP. In [10], in the limit of the available statistics, a similar analysis was performed, finding a correlation of the isospin versus angle α in substantial agreement with the results of [6,7].…”

“…of α and 7 Be and the biggest fragment of the event, for E * 13C <15 MeV. Dashed histogram: the same but for the detected13 C. In the inset the relative c.m angle vs. the relative velocity between the heavy fragment detected in coincidence and the c.m. of α and 9 Be for the system48 Ca at 25 MeV/nucleon is shown.…”

Dense Nuclear Matter Equation of State from Heavy-Ion Collisions

“…The technique of equilibration chronometry allows the visualization of the time evolution of the neutron excess. Signatures of neutron-proton equilibration obeying first-order kinetics are observed both in experimental data [395][396][397][398] and in transport calculations [399]. Since the equilibration depends on the neutron and proton chemical potentials, this technique offers new experimental data to constrain the sub-saturation EOS through comparisons with simulations [6,47,400].…”