Anomalous strong interaction in pionic Mg

The pionic 2p→1s transition has been observed in Mg. For the strong interaction monopole shift a value has been measured of ϵ 0(1s)=−81.6±0.6 keV with respect to the point Coulomb energy, in agreement with standard optical potential predictions. The observed strong interaction absorption width is Γ...

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Published in:Physics letters. B 1985-01, Vol.156 (5), p.296-300
Main Authors: Taal, A., D'Achard Van Enschut, J.F.M., Berkhout, J.B.R., Duinker, W., Van Eijk, C.W.E., Hesselink, W.H.A., Van Den Hoek, P.J., Ketel, T.J., Koch, J.H., Konijn, J., De Laat, C.T.A.M., Lourens, W., Van Middelkoop, G., Poeser, W., Prins, T., Wapstra, A.H.
Format: Article
Language:English
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Summary:The pionic 2p→1s transition has been observed in Mg. For the strong interaction monopole shift a value has been measured of ϵ 0(1s)=−81.6±0.6 keV with respect to the point Coulomb energy, in agreement with standard optical potential predictions. The observed strong interaction absorption width is Γ 0(1s)=17.2±1.6 keV, which is about a factor of 1.5 smaller than expected from presently available models. This measurement confirms the trend of “anomalously” small strong interaction widths for deeply bound pionic states already observed in heavier elements.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(85)91612-0