Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 32: Kernphysik/Spektroskopie
HK 32.6: Vortrag
Dienstag, 8. März 2005, 18:15–18:30, TU MA005
Bremsstrahlung emission in the α decay of 210Po — •Hans Boie, Vinzenz Bildstein, Frank Köck, Martin Lauer, Oliver Niedermaier, Heiko Scheit, and Dirk Schwalm — MPI für Kernphysik, Heidelberg
The emission of bremsstrahlung in the α decay of a nucleus has attracted strong theoretical interest recently (e.g. [1,2]). The emission of bremsstrahlung is usually well described by a semi-classical treatment. However, in an α decay the α particle is tunneling through the Coulomb barrier of the nucleus, a process which can only be understood quantum-mechanically. The proposed semi-classical and quantum-mechanical models differ considerably, but, due to poor statistics, the data available so far [3] do not allow to distinguish between these models.
Therefore, a new experiment has been conceived at the MPI-K Heidelberg, measuring the emission probability of bremsstahlung in the α decay of 210Po [4]. For the production run two new α sources with improved energy resolution were used. After about 280 days of data taking the experiment has now been completed. The experimental setup, the status of the analysis and preliminary results will be presented.
[1] T. Papenbrock and G. F. Bertsch, Phys. Rev. Lett. 80, 4141 (1998).
[2] M.I. Dyakonov, Phys. Rev. C 60, 037602-1 (1999).
[3] J. Kasagi et. al., Phys. Rev. Lett. 79, 371 (1997).
[4] H. Boie et. al., DPG Frühjahrstagung 2002, Vortrag HK 45.6