Two-phonon 1(-) state in 112 Sn observed in resonant photon scattering

I. Pysmenetska, S. Walter, J. Enders, H. von Garrel, O. Karg, U. Kneissl, C. Kohstall, P. von Neumann-Cosel, H.H. Pitz, V.Yu. Ponomarev, M. Scheck, F. Stedile, S. Volz

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Results of a photon scattering experiment on 112 Sn using bremsstrahlung with an endpoint energy of E0=3.8MeV are reported. A J=1state at Ex=3434(1 keV has been excited. Its decay width into the ground state amounts to Γ0=151(17)
meV, making it a candidate for a [2+⊗3−]1−two-phonon state. The results for
112 Snare compared with quasiparticle-phonon model calculations as well as the systematics of the lowest lying 1−states established in other even-mass tin isotopes. In contrast to findings in the heavier stable even-mass Sn isotopes, no
2+states between 2 and 3.5 MeV excitation energy have been detected in the present experiment.
Original languageEnglish
Article number017302
JournalPhysical Review C
Issue number1
Publication statusPublished - 24 Jan 2006
Externally publishedYes


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