Timescale for equilibration of N/Z gradients in dinuclear systems Academic Article uri icon

abstract

  • Equilibration of N/Z in binary breakup of an excited and transiently deformed projectile-like fragment (PLF*), produced in peripheral collisions of 64Zn+27Al, 64Zn, 209Bi at E/A=45 MeV, is examined. The composition of emitted light fragments (3≤Z≤6) changes with the decay angle of the PLF*. The most neutron-rich fragments observed are associated with a small rotation angle. A clear target dependence is observed with the largest initial N/Z correlated with the heavy, neutron-rich target. Using the rotation angle as a clock, we deduce that N/Z equilibration persists for times as long as 3-4 zs (1zs=1×10-21 s =300 fm/c). The rate of N/Z equilibration is found to depend on the initial neutron gradient within the PLF*. © 2013 American Physical Society.

altmetric score

  • 0.5

author list (cited authors)

  • Brown, K., Hudan, S., deSouza, R. T., Gauthier, J., Roy, R., Shetty, D. V., Souliotis, G. A., & Yennello, S. J.

citation count

  • 22

publication date

  • June 2013