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27 April 2024

» pubmed » pmid11909449

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Deeply bound 1s and 2p pionic states in 205Pb and determination of the s-wave part of the pion-nucleus interaction
H Geissel ; H Gilg ; A Gillitzer ; R S Hayano ; S Hirenzaki ; K Itahashi ; M Iwasaki ; P Kienle ; M Münch ; G Münzenberg ; W Schott ; K Suzuki ; D Tomono ; H Weick ; T Yamazaki ; T Yoneyama ;
Date:	25 Mar 2002
Journal:	Phys Rev Lett, 88 (12), 122301
Abstract:	We observed well-separated 1s and 2p pi(-) states in 205Pb in the 206Pb(d,3He) reaction at T(d) = 604.3 MeV. The binding energies and the widths determined are B(1s) = 6.762+/-0.061 MeV, Gamma(1s) = 0.764(+0.154)(-0.171) MeV, B(2p) = 5.110+/-0.045 MeV, and Gamma(2p) = 0.321(-0.062)(+0.060) MeV. They are used to deduce the real and imaginary strengths of the s-wave part of the pion-nucleus interaction, which translates into a positive mass shift of pi(-) in 205Pb.
Source:	PubMed, pmid11909449
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