title: Deeply bound 1s and 2p pionic states in 205Pb and determination of the s-wave part of the pion-nucleus interaction.
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.
authors.affiliation: Gesellschaft für Schwerionenforschung, D-64291 Darmstadt, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Geissel
authors.forename: H
authors.initials: H
authors.lastname: Gilg
authors.forename: A
authors.initials: A
authors.lastname: Gillitzer
authors.forename: R S
authors.initials: RS
authors.lastname: Hayano
authors.forename: S
authors.initials: S
authors.lastname: Hirenzaki
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authors.initials: K
authors.lastname: Itahashi
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authors.initials: M
authors.lastname: Iwasaki
authors.forename: P
authors.initials: P
authors.lastname: Kienle
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authors.initials: M
authors.lastname: Münch
authors.forename: G
authors.initials: G
authors.lastname: Münzenberg
authors.forename: W
authors.initials: W
authors.lastname: Schott
authors.forename: K
authors.initials: K
authors.lastname: Suzuki
authors.forename: D
authors.initials: D
authors.lastname: Tomono
authors.forename: H
authors.initials: H
authors.lastname: Weick
authors.forename: T
authors.initials: T
authors.lastname: Yamazaki
authors.forename: T
authors.initials: T
authors.lastname: Yoneyama