Prog. Theor. Phys. Vol. 58 No. 1 (1977) pp. 190-203

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A Microscopic Study of Elastic Scattering of α Particles on ⁷Li Nuclei

— The Roles of the Triton Exchange and of the Pauli Principle —

Sakae Saito, Hidetoshi Nishioka and Masaru Yasuno

Department of Physics, Nagoya University, Nagoya 464

(Received December 18, 1976)

Abstract:

The orthogonality condition model (OCM) is applied to the analysis of elastic scattering of α particles on ⁷Li nuclei in which the triton (t) exchange is taken into account explicitly. Angular distributions are calculated at several incident energies E_α from 2.0 MeV (lab. system) to 18.0 MeV. A phenomenological imaginary potential is introduced at higher energies (E_α≥12.0 MeV). Satisfactory results are obtained for the characteristic features of angular distributions in the overall region of energies considered. It is clarified that, at energies near the Coulomb barrier (E_α\lesssim6.0 MeV), the t exchange gives rise to a strong effect with a tensor type of interaction at the surface region which results in suppressing the backward rise of the cross section. It is shown that the effect of the Pauli principle plays an indispensable role for this characteristic feature of the effect due to the t exchange. At energies well above the Coulomb barrier (12.0≤E_α≤18.0 MeV), the strong backward rise of the cross section is explained by the t exchange as expected normally, the forward angular distribution being determined by direct scattering.

URL : http://ptp.ipap.jp/link?PTP/58/190/
DOI : 10.1143/PTP.58.190

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Citing Article(s) :

Progress of Theoretical Physics Vol. 62 No. 2 (1979) pp. 424-439 :
Structure Study of 2α+t System by the Orthogonality Condition Model

Hidetoshi Nishioka, Sakae Saito and Masaru Yasuno
Progress of Theoretical Physics Vol. 62 No. 3 (1979) pp. 644-661 :
A Study of ²⁴Mg by ¹⁶O+ α+ α Cluster Model

Kiyoshi Katō and Hiroharu Bandō
Progress of Theoretical Physics Vol. 63 No. 2 (1980) pp. 438-458 :
Study of Distortion Effects in the Elastic d-⁴He Scattering by Orthogonality Condition Model

Hidetoshi Nishioka, Sakae Saito, Hiroyuki Kanada and Tsuneo Kaneko
Progress of Theoretical Physics Supplement No.62 (1977) pp. 11-89 :
Chapter II. Theory of Resonating Group Method and Generator Coordinate Method, and Orthogonality Condition Model

Sakae Saito
Progress of Theoretical Physics Supplement No.62 (1977) pp. 236-294 :
Chapter V. A Coupled Channel Variational Method for Microscopic Study of Reactions between Complex Nuclei

Masayasu Kamimura
Progress of Theoretical Physics Supplement No.68 (1980) pp. 193-302 :
Chapter III. Study of Non-Alpha-Nuclei Based on the Viewpoint of Cluster Correlations

Hiroshi Furutani, Hiroyuki Kanada, Tsuneo Kaneko, Sinobu Nagata, Hidetoshi Nishioka, Shigeto Okabe, Sakae Saito, Toshimi Sakuda and Michio Seya
Progress of Theoretical Physics Supplement No.89 (1986) pp. 136-211 :
Chapter VI. Microscopic Coupled-Channels Study of Scattering and Breakup of Light Heavy-Ions

Yukinori Sakuragi, Masanobu Yahiro and Masayasu Kamimura

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