Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 30: Hadronenstruktur und -spektroskopie
HK 30.3: Vortrag
Mittwoch, 21. März 2012, 17:15–17:30, RW 1
Precise spectroscopy of pionic atoms at RIKEN (2) — •K. Suzuki1, G.P.A. Berg2, H. Geissel3, R.S. Hayano4, S. Hirenzaki5, N. Ikeno5, N. Inabe6, K. Itahashi6, S. Itoh4, D. Kameda6, T. Kubo6, H. Matsubara7, H. Michimasa7, K. Miki7, H. Miya7, M. Nakamura8, T. Nishi4, S. Noji7, S. Ota6, H. Takeda6, K. Todoroki4, K. Tsukada6, T. Uesaka7, H. Weick3, and K Yoshida6 — 1SMI, Vienna, Austria — 2JINA, University of Notre Dame, Indiana, USA — 3GSI, Darmstadt, Germany — 4Department of Physics, University of Tokyo, Tokyo, Japan — 5Nara Women’s University, Nara, Japan — 6RIKEN Nishina Center, RIKEN, Saitama, Japan — 7Center of Nuclear Study, University of Tokyo, Tokyo, Japan — 8Tokyo Institute of Technology, Tokyo, Japan
Following the successful observation of deeply-bound pionic states at GSI that lead to the precise determination of the s-wave π-nucleus interaction and the deduction of the chiral order parameter at normal nuclear density, we started a new series of experiments at RIKEN, exploiting the high intensity deuteron beam (about 1012/s) from the Superconducting Ring Cyclotron (SRC) and the high acceptance fragment separator (BigRIPS). A pilot experiment in October 2010 using the 122Sn(d, 3He) reaction was successful in establishing the dispersion matching optics and to observe the deeply-bound pionic 1s states in 121Sn.
The results of the experiment will be compared with the previous experiments at GSI and the theoretical prediction, and their possible interpretation and the future outlook of the project will be discussed.