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Missing monopole strength of the Hoyle state in the alpha inelastic scattering

Year: 2014
Type: conference-paper
Abstract: Cross sections for the alpha inelastic scattering exciting the low-lying monopole states in 12 C, 16 O, 24 Mg, 28 Si, and 40 Ca were measured and compared with the distorted- wave Born-approximation (DWBA) calculation to examine the puzzle of the missing monopole strength of the Hoyle state. It was found the DWBA calculation using the density-dependent aN interaction systematically overestimates the cross sections for the 0 + transitions, and the puzzle is a universal problem in light nuclei but not special in the Hoyle state. Since the DWBA calculation using the density-independent interaction reasonably well reproduces the experiment, this puzzle might be related to the density dependence of the effective interaction. The coupled-channel effect for the alpha inelastic scattering is also examined. The coupled- channel effect reduces the calculated cross section, and solve the puzzle of the missing monopole strengths in part, but the improvement of the density dependence of the effective interaction is still necessary to solve the puzzle.
DOI: 10.1088/1742-6596/569/1/012014
Authors: T Kawabata, T Kadoya, N Yokota, S Adachi, T Baba, T Furuno, H Fujimura, M Fujiwara, K Hatanaka, Y Ishii, M Itoh, T Ito, Y Maeda, Y Matsuda, M Murata, T Sato, A Tamii, M Tsumura, H Watanabe, J Zenihiro
Institutions: Kyoto University, Wakayama Medical University, Research Center for Nuclear Physics, The University of Osaka, The University of Osaka, Tohoku University, Research Center for Accelerator and Radioisotope Science, Tohoku University, University of Miyazaki, RIKEN
Language: English
Open Access status: diamond
OpenAlex ID: W2152016189
FWCI: 2
Cites: 9
Cited by: 2
Related to: 10