Macroscopic parameters as well precise information on the random force characterizing Langevin-type description of nuclear fusion process around Coulomb barrier are extracted from microscopic dynamics individual nucleons by exploiting numerical simulation improved quantum molecular dynamics. It turns out that dissipation relative motion between two fusing nuclei is caused a non-Gaussian distribution force. We find friction coefficient time correlation function takes particularly large values...

Friction coefficients for the fusion reaction $^{16}\mathrm{O}+^{16}\mathrm{O}\ensuremath{\rightarrow}^{32}\mathrm{S}$ are extracted based on both time-dependent Hartree-Fock and density matrix methods. The latter goes beyond mean-field approximation by taking into account effect of two-body correlations, but in practical simulations reactions we find that total energy is not conserved. We analyze this problem propose a solution allows clear quantification dissipative effects dynamics....

We propose a numerical method to determine the optimal collective reaction path for nucleus-nucleus collision, based on adiabatic self-consistent coordinate (ASCC) method. use an iterative combining imaginary-time evolution and finite amplitude method, solution of ASCC coupled equations. It is applied simplest case, $\alpha-\alpha$ scattering. path, potential, inertial mass. The results are compared with other methods, such as constrained Hartree-Fock Inglis's cranking formula, time-dependent (ATDHF)

Applying a macroscopic reduction procedure to the improved quantum molecular dynamics (ImQMD) model, energy dependences of nucleus-nucleus potential, friction parameter, and random force characterizing one-dimensional Langevin-type description heavy-ion fusion process are investigated. Systematic calculations with ImQMD model show that fluctuation-dissipation relation found in symmetric head-on reactions at energies just above Coulomb barrier fades out when incident increases. It turns this...

Collective reaction paths for fusion reactions $^{16}\mathrm{O}+\ensuremath{\alpha}\ensuremath{\rightarrow}^{20}\mathrm{Ne}$ and $^{16}\mathrm{O}+^{16}\mathrm{O}\ensuremath{\rightarrow}^{32}\mathrm{S}$ are microscopically determined on the basis of adiabatic self-consistent collective coordinate (ASCC) method. The path is maximally decoupled from other intrinsic degrees freedom. turn out to deviate those obtained with standard mean-field calculations constraints quadrupole octupole moments....

A new species of Oreocharis (Gesneriaceae) from northwestern Yunnan in China is described and illustrated. The species, ninglangensis, most similar to O. delavayi, but it can be easily distinguished by conspicuous red stripes inside the corolla mouth finely bullate leaf surface latter.

A new species of Gesneriaceae, Ancylostemon dimorphosepalus W.H. Chen & Y.M. Shui, is described and illustrated. It characterized by its cordate leaves, purple flowers, dimorphous sepals, small upper lobes the corolla. Its relationships with similar species, aureus Oreocharis rotundifolia, are discussed.

The adiabatic self-consistent collective coordinate (ASCC) method is used to determine the optimum reaction path and calculate potential inertial functions of model. properties are investigated with ASCC method, in comparison those cranking formulae. In addition, pair rotation BCS moments inertia for both real gauge spaces may decrease as deformation develops.

The adiabatic self-consistent collective coordinate (ASCC) method is used to determine the optimum reaction path and calculate potential inertial functions of model. properties are investigated with ASCC method, in comparison those cranking formulae. In addition, pair rotation BCS moments inertia for both real gauge spaces may decrease as deformation develops.

Collective inertial mass coefficients with respect to translational, relative, and rotational motions are microscopically calculated, along the collective reaction path self-consistently determined, based on adiabatic self-consistent coordinate (ASCC) method. The impact of time-odd component mean-field potential masses investigated. results compared those calculated cranking formulae. ASCC method reproduce exact total nuclear for translational motion as well reduced asymptotic values...

Abstract A short survey is presented on the experimental investigation of secondary ion emission mainly performed at heavy accelerator GSI in Darmstadt. Samples insulating material, particularly phenylalanine, were irradiated with various MeV ions ranging from I4N to ?W. The data are discussed relevance work other groups. general picture desorption process deduced behaviour molecule specific and low mass fragment ions.

Towards the microscopic theoretical description for large amplitude collective dynamics, we calculate coefficients of inertial masses low-energy nuclear reactions. Under scheme energy density functional, apply adiabatic self-consistent coordinate (ASCC) method, as well Inglis' cranking formula to inertias translational and relative motions, in addition those rotational motion. Taking scattering between two $\alpha$ particles an example, investigate impact time-odd components mean-field...

Using a theory of large amplitude collective motion, the adiabatic self-consistent coordinate method, we derive reaction path for fusion process at sub-barrier energies. The Hamiltonian to describe is constructed, based on obtained and canonical variables. We study N=Z stable nuclei, alpha+16O, 16O+16O, alpha+12C. results suggest that, after two nuclei touch, significantly deviated from simple relative which may affect deep cross section.

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In recent decades, the study of capture and fusion dynamics in heavy-ion collisions has been a subject intense experimental theoretical interests because not only is central importance for nucleosynthesis but also can reveal rich interplay between nuclear structure reaction dynamics. Theoretically, processes at energies near Coulomb barrier be treated as multidimensional penetration problem. The process described by solving coupled-channel equations, i.e., (CC) model. However, heavy systems,...

The adiabatic self-consistent collective coordinate (ASCC) method and its application to nuclear structure reaction are presented. decoupled one-dimensional paths determined for pairing modes in Sn isotopes low-energy fusion of $^{16}$O+$^{16}$O. We show that the path is often significantly different from our intuitive choice, such as pair gap relative between two nuclei.

We present recent results in theoretical studies on nuclear structure and reaction beyond mean field, using the adiabatic self-consistent collective coordinate method its extension.We also new with finite-temperature Hartree-Fock-Bogoliubov calculation threedimensional-coordinate-space representation.