Tetsuo Kammuri

DWBA ANALYSIS OF THE HEAVY ION-INDUCED TRANSFER REACTION.

Abstract The heavy-ion induced transfer reactions have been analysed using the finite-range DWBA. The following reactions are treated for incident energies near the Coulomb barrier: 14N(14N, 13N) 15N, 12C(16O, 16O)12C, 11B(16,, 15N)12C and 27Al(16O, 15N)28Si. In most cases the transfered particle is assumed to be bound in a harmonic oscillator potential well. Part of the calculations has been performed for a simple shell model with the Woods-Saxon potential. Good agreement with experiments can be obtained for reactions involving one-nucleon transfer. For the α-particle transfer process, the calculation shows complicated angular distributions, depending on various parameters.

Semiclassical analysis of the spin polarization of 12B in the 100Mo(14N, 12B)102Ru reaction

Abstract Polarization of 12 B in the 100 Mo( 14 N, 12 B) 102 Ru reaction at 90 MeV incident energy is studied on the basis of the semiclassical theory of transfer reactions proposed by Brink. Gross behaviors of both the polarization and the cross section as functions of product kinetic energy can be predicted successfully by the theory. But disagreement in the numerical values of the polarization is found for low-energy 12 B.

Semiclassical Analysis of the Multinucleon Transfer Reactions between Complex Nuclei

The angular distributions of reactions in which several nucleons are exchanged between complex nuclei are examined in a semiclassical way. It is assumed that since the projectile interacts weakly with the target in a grazing trajectory, it passes through a target along the elastic scattering orbit, while exchanging several nucleons, and finally shows itself as a product of the transfer reaction. The distortion of the Coulomb scattering orbit due to nuclear potential is taken into account. Then for grazing collisions the nuclear and Coulomb forces counteract each other, emitting a particle in a forward direction as observed in experimental data. (auth)

On the importance of the sequential transfer process in the two-nucleon transfer between heavy ions

Abstract Two-nucleon transfer reactions induced by heavy ions, such as ( 18 O, 16 O) and ( 16 O, 14 C), are analysed, putting emphasis on the competition of the simultaneous and sequential transfer processes. The first- and second-order DWBA method is formulated in the no-recoil approximation. The sequential transfer process is found to dominate over simultaneous transfer. Some disagreement remains as to the absolute magnitudes of the experimental and theoretical two-proton transfer cross sections.

Microscopic form factor for DWBA analysis of light-ion induced three-nucleon transfer reactions

Abstract A modified zero-range distorted-wave Born approximation calculation was performed for the (p, α) reactions. The form factor is calculated by a first method, which is an extension of the Bayman and Kallio method to extract the relative l = 0 part of two-nucleon shell-model wave functions. The method includes some of the range effects so that one can predict the absolute magnitudes of the cross sections. A second method in finite range involves the 3He cluster expansion of the α-particle where the known (3He, α) transfer normalization may be used to estimate the absolute cross sections. The 118Sn(p, α)115In reactions are analyzed using the hole-vibration coupling model for 115In. The shapes of the experimental cross sections and the analyzing powers can be fitted by the calculations but the magnitudes of the cross sections are predicted to be too small.

Self-Consistent Velocity Dependent Effective Interactions

The theory of self-consistent effective interactions in nuclei is extended for a system with a velocity dependent mean potential. By means of the field coupling method, we present a general prescription to derive effective interactions which are consistent with the mean potential. For a deformed system with the conventional pairing field, the velocity dependent effective interactions are derived as the multipole pairing interactions in doubly stretched coordinates. They are applied to the microscopic analysis of the giant dipole resonances (GDRs) of

Gross properties of heavy-ion transfer reactions: (II). Comparison with experiment

^{148,154}\mathrm{Sm}

Gross properties of heavy-ion transfer reactions

, the first excited

Boson description of nuclear collective motion: III. Coupled system of the quadrupole and octupole vibrations

{2}^{+}

Effect of tensor force and one-nucleon exchange in the quasielastic (6Li, 6He) reaction

states of Sn isotopes and the first excited