Soft spin dipole giant resonances in 40Ca

L. Stuhl; A. Krasznahorkay; M. Csatlos; T. Marketin; E. Litvinova; T. Adachi; A. Algora; J. Daeven; E. Estevez; H. Fujita; Y. Fujita; C. Guess; J. Gulyas; K. Hatanaka; K. Hirota; H. J. Ong; D. Ishikawa; H. Matsubara; R. Meharchand; F. Molina; H. Okamura; G. Perdikakis; B. Rubio; C. Scholl; T. Suzuki; G. Susoy; A. Tamii; J. Thies; R. Zegers; J. Zenihiro

doi:10.1088/1742-6596/381/1/012096

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arXiv · 1308.3566

Soft spin dipole giant resonances in 40Ca

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Abstract

High resolution experimental data has been obtained for the 40,42,44,48Ca(3He,t)Sc charge exchange reaction at 420 MeV beam energy, which favors the spin-isospin excitations. The measured angular distributions were analyzed for each state separately, and the relative spin dipole strength has been extracted for the first time. The low-lying spin-dipole strength distribution in 40Sc shows some interesting periodic gross feature. It resembles to a soft, dumped multi-phonon vibrational band with $\hbar\omega$= 1.8 MeV, which might be associated to pairing vibrations around $^{40}$Ca.

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L. Stuhl, A. Krasznahorkay, M. Csatlos, T. Marketin, E. Litvinova, T. Adachi, A. Algora, J. Daeven, E. Estevez, H. Fujita, Y. Fujita, C. Guess, J. Gulyas, K. Hatanaka, K. Hirota, H. J. Ong, D. Ishikawa, H. Matsubara, R. Meharchand, F. Molina, H. Okamura, G. Perdikakis, B. Rubio, C. Scholl, T. Suzuki, G. Susoy, A. Tamii, J. Thies, R. Zegers, J. Zenihiro. 2013-08-16. Soft spin dipole giant resonances in 40Ca. https://doi.org/10.1088/1742-6596/381/1/012096

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