Coupled-Channels Approach for Dissipative Quantum Dynamics in Near-Barrier Collisions

Journal Article · Wed Mar 04 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3108859· OSTI ID:21289486

Diaz-Torres, A; Hinde, D J; Dasgupta, M ^[1]; Milburn, G J ^[2]; Tostevin, J A ^[3]

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1. Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200 (Australia)
2. Centre for Quantum Computer Technology, University of Queensland, St. Lucia, Queensland 4072 (Australia)
3. Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)

A novel quantum dynamical model based on the dissipative quantum dynamics of open quantum systems is presented. It allows the treatment of both deep-inelastic processes and quantum tunneling (fusion) within a fully quantum mechanical coupled-channels approach. Model calculations show the transition from pure state (coherent) to mixed state (decoherent and dissipative) dynamics during a near-barrier nuclear collision. Energy dissipation, due to irreversible decay of giant-dipole excitations of the interacting nuclei, results in hindrance of quantum tunneling.

• OSTI ID: 21289486
• Journal Information: AIP Conference Proceedings, Vol. 1098, Issue 1; Conference: FUSION08: International conference on new aspects of heavy ion collisions near the Coulomb barrier, Chicago, IL (United States), 22-26 Sep 2008; Other Information: DOI: 10.1063/1.3108859; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COULOMB FIELD
COUPLED CHANNEL THEORY
DEEP INELASTIC SCATTERING
ENERGY LOSSES
EXCITATION
GIANT RESONANCE
HEAVY ION FUSION REACTIONS
MIXED STATE
QUANTUM MECHANICS
TUNNEL EFFECT