Analogs of the giant dipole and spin-dipole resonances in {sup 4}He and in {alpha} clusters of {sup 6,7}Li studied by the {sup 4}He,{sup 6,7}Li({sup 7}Li,{sup 7}Be{gamma}) reactions
Abstract
We studied analogs of the giant dipole resonance (GDR) and spin-dipole resonance (SDR) in {sup 4}He and in the {alpha} clusters of {sup 6,7}Li via the ({sup 7}Li,{sup 7}Be{gamma}) reactions on {sup 4}He, {sup 6}Li, and {sup 7}Li at an incident energy of 455 MeV and at a scattering angle of 0 deg. by measuring spin-nonflip and spin-flip spectra. The reaction Q-values for the analogs of the GDR and SDR in the {alpha} clusters of {sup 6,7}Li were found to be more negative than those in {sup 4}He by 2.0{+-}0.5 MeV. The ratios of the cross section for the analog of the GDR to that for the analog of the SDR in {sup 4}He and in the {alpha} clusters of {sup 6}Li and {sup 7}Li were found to be the same within errors, 0.5{+-}0.1. The cross sections for the analogs of the GDR as well as those for the analogs of the SDR in the {alpha} clusters of {sup 6,7}Li were 0.6{approx}0.8 times smaller than those in {sup 4}He. These results suggest that excitations of {alpha} clusters embedded in nuclei are suppressed as compared with excitations of free {alpha} particles.
- Authors:
-
- Department of Physics, University of Tokushima, Tokushima 770-8502 (Japan)
- Department of Physics, Konan University, Kobe 658-8501 (Japan)
- Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)
- Research Center for Nuclear Physics, Osaka University, Osaka 567-0047 (Japan)
- Department of Physics, International Christian University, Tokyo 181-0015 (Japan)
- Publication Date:
- OSTI Identifier:
- 21192020
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review. C, Nuclear Physics
- Additional Journal Information:
- Journal Volume: 78; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevC.78.014303; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALPHA PARTICLES; CLUSTER MODEL; CROSS SECTIONS; DIPOLES; EXCITATION; GIANT RESONANCE; HELIUM 4; LITHIUM 6; LITHIUM 7; MEV RANGE 100-1000; RESONANCE; SCATTERING; SPECTRA; SPIN; SPIN FLIP
Citation Formats
Nakayama, S, Matsumoto, E, Fushimi, K, Hayami, R, Kawasuso, H, Yasuda, K, Yamagata, T, Akimune, H, Ikemizu, H, Asaji, S, Ishida, T, Kudoh, T, Sagara, K, Fujiwara, M, Hashimoto, H, Kawase, K, Nakanishi, K, Oota, T, Yosoi, M, and Greenfield, M B. Analogs of the giant dipole and spin-dipole resonances in {sup 4}He and in {alpha} clusters of {sup 6,7}Li studied by the {sup 4}He,{sup 6,7}Li({sup 7}Li,{sup 7}Be{gamma}) reactions. United States: N. p., 2008.
Web. doi:10.1103/PHYSREVC.78.014303.
Nakayama, S, Matsumoto, E, Fushimi, K, Hayami, R, Kawasuso, H, Yasuda, K, Yamagata, T, Akimune, H, Ikemizu, H, Asaji, S, Ishida, T, Kudoh, T, Sagara, K, Fujiwara, M, Hashimoto, H, Kawase, K, Nakanishi, K, Oota, T, Yosoi, M, & Greenfield, M B. Analogs of the giant dipole and spin-dipole resonances in {sup 4}He and in {alpha} clusters of {sup 6,7}Li studied by the {sup 4}He,{sup 6,7}Li({sup 7}Li,{sup 7}Be{gamma}) reactions. United States. https://doi.org/10.1103/PHYSREVC.78.014303
Nakayama, S, Matsumoto, E, Fushimi, K, Hayami, R, Kawasuso, H, Yasuda, K, Yamagata, T, Akimune, H, Ikemizu, H, Asaji, S, Ishida, T, Kudoh, T, Sagara, K, Fujiwara, M, Hashimoto, H, Kawase, K, Nakanishi, K, Oota, T, Yosoi, M, and Greenfield, M B. 2008.
"Analogs of the giant dipole and spin-dipole resonances in {sup 4}He and in {alpha} clusters of {sup 6,7}Li studied by the {sup 4}He,{sup 6,7}Li({sup 7}Li,{sup 7}Be{gamma}) reactions". United States. https://doi.org/10.1103/PHYSREVC.78.014303.
@article{osti_21192020,
title = {Analogs of the giant dipole and spin-dipole resonances in {sup 4}He and in {alpha} clusters of {sup 6,7}Li studied by the {sup 4}He,{sup 6,7}Li({sup 7}Li,{sup 7}Be{gamma}) reactions},
author = {Nakayama, S and Matsumoto, E and Fushimi, K and Hayami, R and Kawasuso, H and Yasuda, K and Yamagata, T and Akimune, H and Ikemizu, H and Asaji, S and Ishida, T and Kudoh, T and Sagara, K and Fujiwara, M and Hashimoto, H and Kawase, K and Nakanishi, K and Oota, T and Yosoi, M and Greenfield, M B},
abstractNote = {We studied analogs of the giant dipole resonance (GDR) and spin-dipole resonance (SDR) in {sup 4}He and in the {alpha} clusters of {sup 6,7}Li via the ({sup 7}Li,{sup 7}Be{gamma}) reactions on {sup 4}He, {sup 6}Li, and {sup 7}Li at an incident energy of 455 MeV and at a scattering angle of 0 deg. by measuring spin-nonflip and spin-flip spectra. The reaction Q-values for the analogs of the GDR and SDR in the {alpha} clusters of {sup 6,7}Li were found to be more negative than those in {sup 4}He by 2.0{+-}0.5 MeV. The ratios of the cross section for the analog of the GDR to that for the analog of the SDR in {sup 4}He and in the {alpha} clusters of {sup 6}Li and {sup 7}Li were found to be the same within errors, 0.5{+-}0.1. The cross sections for the analogs of the GDR as well as those for the analogs of the SDR in the {alpha} clusters of {sup 6,7}Li were 0.6{approx}0.8 times smaller than those in {sup 4}He. These results suggest that excitations of {alpha} clusters embedded in nuclei are suppressed as compared with excitations of free {alpha} particles.},
doi = {10.1103/PHYSREVC.78.014303},
url = {https://www.osti.gov/biblio/21192020},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 1,
volume = 78,
place = {United States},
year = {Tue Jul 15 00:00:00 EDT 2008},
month = {Tue Jul 15 00:00:00 EDT 2008}
}