K. Hagino

A program for coupled-channel calculations with all order couplings for heavy-ion fusion reactions

A FORTRAN 77 program that calculates fusion cross sections and mean angular momenta of the compound nucleus under the influence of couplings between the relative motion and several nuclear collective motions is presented. The no-Coriolis approximation is employed to reduce the dimension of coupled-channel equations. The program takes into account the effects of nonlinear couplings to all orders, which have been shown to play an important role in heavy-ion fusion reactions at subbarrier energies.

Fusion versus breakup: observation of large fusion suppression for 9Be + 208Pb

Complete fusion excitation functions for

Subbarrier Fusion Reactions and Many-Particle Quantum Tunneling

{}^{9}\mathrm{Be}{+}^{208}\mathrm{Pb}

Coupled-channels analysis of the 16 O + 208 Pb fusion barrier distribution

have been measured to high precision at near barrier energies. The experimental fusion barrier distribution extracted from these data allows reliable prediction of the expected complete fusion cross sections. However, the measured cross sections are only 68% of those predicted. The large cross sections observed for incomplete fusion products support the interpretation that this suppression of fusion is caused by

Deformation of Λ hypernuclei

{}^{9}\mathrm{Be}

Pairing correlations in nuclei on the neutron-drip line

breaking up into charged fragments before reaching the fusion barrier. Implications for the fusion of radioactive nuclei are discussed.

Adiabatic quantum tunneling in heavy-ion sub-barrier fusion

Low-energy heavy-ion fusion reactions are governed by quantum tunneling through the Coulomb barrier formed by the strong cancellation of the repulsive Coulomb force with the attractive nuclear interaction between the colliding nuclei. Extensive experimental as well as theoretical studies have revealed that fusion reactions are strongly influenced by couplings of the relative motion of the colliding nuclei to several nuclear intrinsic motions. Heavy-ion subbarrier fusion reactions thus provide a good opportunity to address the general problem of quantum tunneling in the presence of couplings, which has been a popular subject in recent decades in many branches of physics and chemistry. Here, we review theoretical aspects of heavy-ion subbarrier fusion reactions from the viewpoint of quantum tunneling in systems with many degrees of freedom. Particular emphases are put on the coupled-channels approach to fusion reactions and the barrier distribution representation for multichannel penetrability. We also discuss an application of the barrier distribution method to elucidate the mechanism of the dissociative adsorption of H2 molecules in surface science. Subject Index: 062, 211, 223, 226, 330

Shape of {Lambda} hypernuclei in the ({beta},{gamma}) deformation plane

Analyses using simplified coupled-channels models have been unable to describe the shape of the previously measured fusion barrier distribution for the doubly magic

Coexistence of BCS-and BEC-like pair structures in halo nuclei

^{16}

Systematic study of nuclear matrix elements in neutrinoless double-

O+