München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 4: Kernphysik/Spektroskopie
HK 4.2: Vortrag
Montag, 20. März 2006, 14:15–14:30, C
Electron scattering study of the monopole transition to the Hoyle state in 12C: Is there an α-condensate?* — •M. Chernykh1, H. Feldmeier2, T. Neff3, P. von Neumann-Cosel1, and A. Richter1 — 1Institut für Kernphysik, Technische Universität Darmstadt — 2Gesellschaft für Schwerionenforschung (GSI), Darmstadt — 3NSCL, Michigan State University, USA
Electron scattering form factors for the ground state and the second 0+ state (7.654 MeV, Hoyle state) in 12C have been compiled in [1]. The data, together with new measurements at low momentum transfer at the S-DALINAC, are compared with microscopic calculations within the Fermionic Molecular Dynamics model [2,3]. Excellent description of the ground state and a reasonable description of the excited state is found. Consequences for a possible interpretation of this state as an α-particle condensate [4] are discussed.
[1] H. Crannell, private communication
[2] H. Feldmeier and J. Schnack, Rev. Mod. Phys. 72 (2000) 655
[3] R. Roth, T. Neff, H. Hergert, H. Feldmeier, Nucl. Phys. A745 (2004) 3
[4] A. Tohsaki, H. Horiuchi, P. Schuck, and G. Röpke, Phys. Rev. Lett. 87 (2001) 192501
*Supported by the DFG through SFB 634.