Results of a photon scattering experiment on 112Sn using bremsstrahlung with an endpoint energy of E_0 = 3.8 MeV are reported. A J = 1 state at E_x = 3434(1) keV has been excited. Its decay width into the ground state amounts to Gamma_0 = 151(17) meV, making it a candidate for a [2+ x 3-]1- two-phonon state. The results for 112Sn are compared with quasiparticle-phonon model calculations as well as the systematics of the lowest-lying 1- states established in other even-mass tin isotopes. Contrary 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.
@article{arxiv.nucl-ex/0512013,
title = {Two-phonon 1- state in 112Sn observed in resonant photon scattering},
author = {I. Pysmenetska and S. Walter and J. Enders and H. von Garrel and O. Karg and U. Kneissl and C. Kohstall and P. von Neumann-Cosel and H. H. Pitz and V. Yu. Ponomarev and M. Scheck and F. Stedile and S. Volz},
journal= {arXiv preprint arXiv:nucl-ex/0512013},
year = {2007}
}
Comments
10 pages, including 2 figures, Phys. Rev. C, in press