Investigation on Microscopic Dynamics of Dissipation in Nuclear Collective Motion (原子核動力学における散逸と減衰)

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概要

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• Aiming to understand the microscopic mechanism responsible for the dissipative behavior of the large-amplitude collective motion and the complex interplay between the collective and single particle degrees of freedom, a system with three degrees of freedom is examined within the time-dependent Hartree-Fock theory. Exploiting the self-consistent collective coordinate (SCC) method, the total system is optimally devided into the collective and intrinsic subsystems. The energy dissipation process and dynamical evolution process of each subsystem are numerically simulated and examined. The numerical results shows that the energy of collective motion is transfered to the environment and the regularity of collective degree of freedom is almost kept sticking to the KAM torus, and the intrinsic subsystem remains in chaotic situation so as to be treated as a heat bath.

• 素粒子論グループ 素粒子研究編集部の論文
• 1999-06-20

著者

• Wu Xi-zhen

  China Institute Of Atomic Energy

• Sakata Fumihiko

  Department Of Mathmatical Sciences Ibaraki University

• Sakata Fumihiko

  Department Of Mathematical Sciences Ibaraki University

• Zhuo Yi-zhong

  China Institute Of Atomic Energy:institute Of Theoretical Physics Academia Sinica

• Yan Shiwei

  Department Of Mathmatical Sciences Ibaraki University

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• Bifurcation Structure of Eigenstates and Periodic Trajectories in TDHF Phase Space : Weak Nonlinearity Case in SU(3) Model : Nuclear Physics
• A Numerical Study on the Structure Change of Collective Motions
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• Quantum Nonlinear Resonance : Nuclear Physics
• Microscopic Description of Nuclear Collective Rotation by Means of the Self-Consistent Collective Coordinate Method : Occurrence Mechanism of Collective Rotation : Nuclear Physics
• Extraction of Dynamical Collective Subspace for Large-Amplitude Collective Motion : Application to Simple Solvable Model : Nuclear Physics
• Collective, Dissipative and Stochastic Motions in the TDHF Theory : Nuclear Physics
• Concept of Dynamical Collective Submanifold for Large-Amplitude Collective Motion in the TDHF Theory : Nuclear Physics
• Intrinsic Excitation Modes Compatible with Large-Amplitude Collective Motion in the TDHF Theory : Nuclear Physics
• Applicability of the Concept of "Optimal" Collective Submanifold Determined by the Self-Consistent Collective-Coordinate Method : Long-Time Behavior of Trajectories on "Optimal" Collective Submanifold : Nuclear Physics
• Geometry of the Self-Consistent Collective-Coordinate Method for the Large-Amplitude Collective Motion : Stability Condition of Maximally-Decoupled Collective Submanifold
• Maximally-Decoupled Collective Submanifold in a Simple Solvable Model
• An Attempt toward Quantum Theory of "Maximally-Decoupled"Collective Motion
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• A Microscopic Theory of the So-Called "Two-Phonon" States in Even-Even Nuclei. II : Formulation
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• Chapter 1 Present Status of the Microscopic Study of Low-Lying Collective States in Spherical and Transitional Nuclei
• Chapter 3 A New Microscopic Method for Describing the Elementary Modes of Excitation in the Intrinsic Subspace : Dressed n-Quasiparticle Modes and Multi-Phonon Excitation
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• Bifurcation Structure of Eigenstates and Periodic Trajectories in TDHF Phase Space : Weak Nonlinearity Case in SU(3) Model : Nuclear Physics

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