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Dinner: Days Chinese Buffet All you can eat £ :30

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Presentation on theme: "Dinner: Days Chinese Buffet All you can eat £ :30"— Presentation transcript:

1 Dinner: Days Chinese Buffet All you can eat £11.99 19:30
Brighton_PRESPEC_Jan_2011

2 Brighton_PRESPEC_Jan_2011

3 Deformation and shape changes around 106Zr
Brighton_PRESPEC_Jan_2011

4 Brighton_PRESPEC_Jan_2011
111Tc: Urban et al. EPJA24 (2005) 161 116Pd: Hua et al. Phys. Letts. B562 (2003) 201 113Tc Known prolate nuclei Brighton_PRESPEC_Jan_2011 Diagram modified from Urban et al

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113Tc 112Tc Coincidences are weak but clear: MSU: Folden et al; Phys Rev C79 (2009) 92 keV gate 258 keV gate Brighton_PRESPEC_Jan_2011

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112Tc l < 2 Z=43, N=69 => four combinations of parities for energy surface calculations g.s –n, +p ~400 keV +n, +p ~400 keV –n, -p oblate, b2~0.2 Brighton_PRESPEC_Jan_2011

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5/2[422],7/2[523] Brighton_PRESPEC_Jan_2011

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112Tc 258 keV transition 92 keV transition 5/2[422]7/2[523] Measured hindrance for 258 keV E1 is 107 which is not unreasonable => isomerism caused by shape change Brighton_PRESPEC_Jan_2011

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113Tc triaxial 5/2+ 5/2- 114 oblate Measured hindrance for 114 keV E1 is 3 x 106 which is not unreasonable => isomerism caused by shape change Z=43, N=60 => positive and negative parity surfaces g.s +ve triaxial -ve oblate, b2~0.2 5/2[422] Brighton_PRESPEC_Jan_2011

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Summary: Isomers observed in 112,113Tc due to (predicted) shape change Recently published in Phys Rev C82 Analysis of beta-decay around 106Zr is ongoing Music Brighton_PRESPEC_Jan_2011

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Next plans: b-gamma-gamma coincidences to get lifetimes => matrix elements. Brighton_PRESPEC_Jan_2011

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Collaborators on 112,113Tc A.M.Bruce, S.Lalkovski, A.M.Denis Bacelar University of Brighton, UK A.B.Garnsworthy, S.Steer, S.Pietri, Zs.Podolyák, G.F.Farrelly, W.Gelletly, I.J.Cullen, P.M.Walker University of Surrey, UK M.Górska, P.Bednarczyk, L.Caceres, P.Doornenbal, J.Gerl, J.Grębosz, I.Kojouharov, N.Kurz, W.Prokopowicz, H.Schaffner, S.Tashenov, and H.J.Wollersheim GSI, Germany G.Jaworski, M.Palacz Warsaw University, Poland C.Hinke TUM, Germany G.Ilie University of Cologne, Germany E.Casarejos University of Vigo, Spain S.Myalski, Polish Academy of Science, Poland F.R.Xu, Y.Shi Peking University, China Brighton_PRESPEC_Jan_2011

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