Dissipative quantum dynamics in low-energy collisions of complex nuclei

Journal Article · Mon Dec 15 00:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.064604· OSTI ID:21199433

Diaz-Torres, A; Hinde, D J; Dasgupta, M; Milburn, G J; Tostevin, J A ^[1]

---

1. Department of Nuclear Physics, Research School of Physical Sciences and Engineering Australian National University, Canberra, ACT 0200 (Australia)

Model calculations that include the effects of irreversible, environmental couplings on top of a coupled-channels dynamical description of the collision of two complex nuclei are presented. The Liouville-von Neumann equation for the time evolution of the density matrix of a dissipative system is solved numerically providing a consistent transition from coherent to decoherent (and dissipative) dynamics during the collision. Quantum decoherence and dissipation are clearly manifested in the model calculations. Energy dissipation, due to the irreversible decay of giant-dipole vibrational states of the colliding nuclei, is shown to result in a hindrance of quantum tunneling and fusion.

• OSTI ID: 21199433
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 78, Issue 6; Other Information: DOI: 10.1103/PhysRevC.78.064604; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOLTZMANN-VLASOV EQUATION
COLLISIONS
COUPLED CHANNEL THEORY
COUPLING
DECAY
DENSITY MATRIX
DIPOLES
ENERGY LOSSES
EQUATIONS
NUCLEI
QUANTUM DECOHERENCE
SIMULATION
TUNNEL EFFECT
VIBRATIONAL STATES