TY - JOUR
T1 - Missing monopole strength of the Hoyle state in the alpha inelastic scattering
AU - Kawabata, T.
AU - Kadoya, T.
AU - Yokota, N.
AU - Adachi, S.
AU - Baba, T.
AU - Furuno, T.
AU - Fujimura, H.
AU - Fujiwara, M.
AU - Hatanaka, K.
AU - Ishii, Y.
AU - Itoh, M.
AU - Ito, T.
AU - Maeda, Y.
AU - Matsuda, Y.
AU - Murata, M.
AU - Sato, T.
AU - Tamii, A.
AU - Tsumura, M.
AU - Watanabe, H.
AU - Zenihiro, J.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2014
Y1 - 2014
N2 - Cross sections for the alpha inelastic scattering exciting the low-lying monopole states in 12C, 16O, 24Mg, 28Si, and 40Ca 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.
AB - Cross sections for the alpha inelastic scattering exciting the low-lying monopole states in 12C, 16O, 24Mg, 28Si, and 40Ca 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.
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U2 - 10.1088/1742-6596/569/1/012014
DO - 10.1088/1742-6596/569/1/012014
M3 - Conference article
AN - SCOPUS:84919430064
SN - 1742-6588
VL - 569
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012014
T2 - 3rd International Workshop on State of the Art in Nuclear Cluster Physics, SOTANCP 2014
Y2 - 26 May 2014 through 30 May 2014
ER -