Admixtures of Shell and Cluster States in ¹⁸O:

Abstract

The energy spectra, electric-transitions and reduced α-widths of the low-lying positive-parity levels of ¹⁸O are shown to be well understood by considering admixtures of 2p shell and “4p-2h” cluster states. The weak coupling feature of “4p-2h” cluster states is well realized in the lowest [λ⊗¹⁴C_gr] band. It is discussed that couplings between the shell and the cluster states are rather small in comparison with those in ¹⁸F(T=0). In order to reproduce the observed E2-transitions, the additional polarization charges δe_n^2p=0.5e and δe^4p-2h=0.2e are required.

Citing Article(s):

1. Progress of Theoretical Physics Vol. 59 No. 5 (1978) pp. 1543-1550

   Influence of α-Clustering on the Odd-Parity Levels in A = 18 Nuclei Toshimi Sakuda, Sinobu Nagata and Fumiki Nemoto

2. Progress of Theoretical Physics Vol. 65 No. 3 (1981) pp. 919-937

   Four Particle-Two Hole Correlations and the Effective Interaction Hiroharu Bandō, Toshio Motoba and Kenji Suzuki

3. Progress of Theoretical Physics Supplement No.65 (1979) pp. 1-9

   Chapter I. Introduction Kazuhiko Andō, Hiroharu Bandō and Sinobu Nagata

4. Progress of Theoretical Physics Supplement No.65 (1979) pp. 111-135

   Chapter IV. Coupling Effects of Two-Particle and Alpha Two-Hole States in A = 18 Nuclei Toshimi Sakuda, Sinobu Nagata and Fumiki Nemoto

5. Progress of Theoretical Physics Supplement No.65 (1979) pp. 136-172

   Chapter V. Structure of Light fp-Shell Nuclei Toshio Motoba and Kazunori Itonaga

6. 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

7. Progress of Theoretical Physics Supplement No.132 (1998) pp. 103-133

   Chapter 4. Microscopic Study of Coexistence of Alpha-Cluster and Shell-Model Structure in the ⁴⁰Ca–⁴⁴Ti Region Toshimi Sakuda and Shigeo Ohkubo

8. Progress of Theoretical Physics Supplement No.192 (2012) pp. 1-238

   Recent Developments in Nuclear Cluster Physics Hisashi Horiuchi, Kiyomi Ikeda and Kiyoshi Katō