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News on 12 C from  -decay studies

News on 12 C from  -decay studies. What’s left to study in 12 C ? New results from -decay studies. Hans O. U. Fynbo Department of Physics and Astronomy University of Aarhus, Denmark. Tokyo, June 4, 2007. 7.377. 0 +. 7.275. a+a+a. What’s left to study in 12 C ?. (2 + ).

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News on 12 C from  -decay studies

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  1. News on 12C from -decay studies • What’s left to study in 12C ? • New results from -decay studies Hans O. U. Fynbo Department of Physics and Astronomy University of Aarhus, Denmark Tokyo, June 4, 2007

  2. 7.377 0+ 7.275 a+a+a What’s left to study in 12C ? (2+) (15.3) 15.11 1+ 14.08 4+ 13.35 (2-, 4-) 12.71 1+ 11.83 2- 10.27 (11.2) (2+) 10.84 1- (0/2+) 10.3 2+ 9.641 3- • Ongoing theoretical interest : • Ab-initio VMC or Greens-Function MC • No core shell-model QM-060, QW-070 • AMD/FMD F1-1, F10-1, QW-062 • Algebraic calculations Bijker &Iachello • Cluster models QM-054, QT-021,QT-039, QW-015, QW-017 • Condensate states ? Q5-5, F3-2, QT-050-51 • Astrophysics 7.65 0+ a+a+a 7.275 8Be+a 4.4389 2+ 0 0+ Levels according to TUNL

  3. Why is it experimentally challenging ? 10B(3He,p)12C Talk : O. Tengblad (F1-3) Posters : M. Alcorta, O. Kirsebom (QT-206))

  4. b-decay approach : Selection rules 1+ (15.3) (2+) 0.000044(15) 15.11 1+ 1+ 0.0031(12) 1+ 12.71 0.0046(15) (2+) (11.5) 0.0008(2) 0,2+ 10.3 0.027(4) 0.015(3) 7.6542 0+ 7.275 0.0190(3) 0.0125(5) 4.4389 2+ 0.946(6) 0.972(3) 0 0+ See also talk of M.Itoh (F11-7)

  5. b-decay approach : Earlier work Phys. Rev. 111 (1958) 567 Phys. Rev. 130 (1963) 1953 12N/12B+X Beam a,b Target Nucl. Phys. A89 (1966) 401

  6. Inverse Kinematics+Separator 12N/12B 12N/12B+X Magnets p/d ab 12C/11B Talk : H.Wilschut (J2-5) , Poster : R.Raabe (QT-011) Direct Kinematics+ISOL 12C/11B 12N/12B+X 12N/12B p/d Magnet ab Nucl.Phys. A738 (2004) 59. Nucl.Phys. A760 (2005) 3. Nature 433 (2005) 136. Talks : J.Äystö (A1-4), L. Fraile (J2-2), H. Frånberg (J2-7)

  7. ISOL Experiment 2004 L.M. Fraile & J.Äystö, NIMA513 (2003) 287. 12N/12B Talks : J.Äystö (A1-4), L. Fraile (J2-2), H. Frånberg (J2-7)

  8. ab 0+, 2+ ? 1+ 0+, 2+ ? Christian Diget

  9. KVI Experiment 2006 K. Jungmann H. Wilschut Talk J2-5. 12N/12B R.Raabe, QT-011

  10. ab 0+ 1+ 0+, 2+ ? 0+, 2+ ? 1+ Solveig Hyldegaard

  11. 0.55(2)% 0.56(7)% 0.46(15)% 0.122(7)% 0.108(15)% 0.28(8)% 1.43(7)% 2.7(4) % Comparison of the two Experiments KVI #12N = 8.8107 IGISOL #12N = 1.2108

  12. ab 0+, 2+ ? 1+ Christian Diget

  13. ab 0+ 0+, 2+ ? 1+ Solveig Hyldegaard

  14. 0.108(4)% 0.116(13)% 0.08(2)% 0.59(4)% 1.2(3)% 3.0(2)10-4% 3.4(6) 10-4% Comparison of the two Experiments KVI #12B = 9.3107 IGISOL #12B = 9.7108 1+

  15. Comparison of the two Decays 12B 12N

  16. Comparison of the two Decays

  17. 2+ R-matrix fits : Presently only to IGISOL and 8Be(gs) Nucl.Phys. A738 (2004) 59. Nucl.Phys. A760 (2005) 3. Nature 433 (2005) 136. 0+ 0+ Work in progress to include 8Be(2+) and new data.

  18. M. Alcorta, R. Boutami, M.J.G. Borge, L. Fraile, M. Madurga, O. Tengblad, • M. Turrion, Instituto Estructura de la Materia, CSIC, Madrid, Spain • T. Eronen, W. Huang, J. Huikari, A. Jokinen,A. Kankainen, I. Moore, • A. Nieminen, H. Penttilä, S. Rinta-Anttila, Y. Wang, J. Äystö, A. Saatamoinen, • K. Perajärvi, Department of Physics, University of Jyväskylä, Finland • B. Jonson, M. Meister, T. Nilsson, G. Nyman, K. Wilhelmsen, • Fundamental Physics, Chalmers University of Technology, Gothenburg,Sweden Collaborators • C. Aa. Diget, H. Jeppesen, S.Hyldegaard, H.H. Knudsen, O. Kirsebom,K. Riisager, • Department of Physics and Astronomy, Århus University, Denmark • B. Fulton, S.Fox • University of York, United Kingdom. Thank you for your attention ! • F.C. Barker • Australian National University • K. Jungmann, S. Brandenburg, H. Wilschut, P. Dendooven, A. Rogachevskiy, • G. Onderwater, E. Traykov, M. Sohani, KVI, Groningen, The Netherlands • R. Raabe, J. Bücherer, Piet van Duppen, Mark Huyse, IKS, Leuven, Belgium

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