13 december 2002H.L. / KVI PAC Meeting1 Pionic fusion: comparison of different spin/isospin channels Study coherence of pion production, role of clustering correlations in the pionic fusion process, production mechanism: s, p-wave dynamics 13 december 2002H.L. / KVI PAC Meeting2 Existing data and models L. Bimbot et al., PL B 114(82)311 semi-phenomenological model: 3-nucleon transfer by p- 3 He reaction, analytic expressions for transfer formfactors from HO wave functions 13 december 2002H.L. / KVI PAC Meeting3 Interacting cluster model Kajino, Toki, Kubo, PRC 35(87)1370 correlated microscopic cluster wave functions using Resonating Group Method (RGM), NN effective interaction + Coulomb (check charge symmetry), entrance channel distortions by local imaginary potential W D between clusters (from DWBA) compared to shell model wave functions data suggest importance of cluster correlations 13 december 2002H.L. / KVI PAC Meeting4 origin of enhancement in cluster model decomposition of contributions inter-cluster ( 3 H 4 He) relative motion absorbs large momentum transfer to fused system 7 Li 13 december 2002H.L. / KVI PAC Meeting5 Prediction for 0 fusion to 7 Be chance to separate g.s. and excited state: excellent application of dual-range QDCs simulated CM distribution with accepted events using cos 2 ( ) distribution for pions experiment strategy: final-state slectivity by -decay tagging calculations but now data 13 december 2002H.L. / KVI PAC Meeting6 Inclusive d - fusion M. Andersson et al., PL B 481 (00)165 measured integrated cross section (230 nb and 140 nb at 1.2 and 1.9 MeV above threshold) and strong forward-backward asymmetry data explained by process via quasi-deuteron: overlap with quasi-d determines angular distribution 13 december 2002H.L. / KVI PAC Meeting7 Systematic study of cluster structures similar processes but with increasingly complex cluster structure: decisive tool: angular distributions final-state slectivity by -decay tagging 9 Be 3 He n 12 C * 00 10 B d d 12 C * 00 6 Li d 12 C * 00 6 Li d 4 He 3 He n 7 Be * 00 4 He 3 He 7 Be * 00 ? 13 december 2002H.L. / KVI PAC Meeting8 angle acceptance of fusion products max. 3.8 deg in B mode pionic fusion radiative fusion (capture) ground state excited state (15.1 MeV) 13 december 2002H.L. / KVI PAC Meeting9 momentum acceptance of fusion products array of ca. 50 phoswich detectors 100 m plastic/CsI 1.3X4 cm 2 in focal plane of BBS for HI detection: fusion products of 10 30 A MeV coverage of momentum distribution by HI detectors: all / accepted events BB 13 december 2002H.L. / KVI PAC Meeting10 Summary ) ( 98 kinematics s-wave p-wave s-wave p-wave Reactions with increasing complexity in cluster structure and different pion kinematics 13 december 2002H.L. / KVI PAC Meeting11 acceptance of neutral pions 13 december 2002H.L. / KVI PAC Meeting12 TAPS schedule ELSA Bonn - 6/03including 2 KVI proposals MAMI-B Mainz6/03 - 6/04with Crystal Barrel KVI7/04 - 6/05setup during part of Trimp setup MAMI-C7/05 - early 07with Crystal Barrel 13 december 2002H.L. / KVI PAC Meeting13 Table of BBS parameters ModeABC distance to Q m momentum bite131925% solid angle msr hor. angle span deg. vert. angle span deg. hor. magnific vert. magnific lat. dispersion2.54 cm / % ang. dispersion42 deg. 13 december 2002H.L. / KVI PAC Meeting14 Proposed reactions 13 december 2002H.L. / KVI PAC Meeting15 design of liquid He target as buffer cryostat by Vacuum Specials Co. and P. Dendooven, J. Mulder, H. Timersma, H.L.