Darmstadt 2016 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 12: Structure and Dynamics of Nuclei III

HK 12.3: Talk

Monday, March 14, 2016, 17:15–17:30, S1/01 A03

Coulomb excitation of ⁴⁸K — •Burkhard Siebeck¹, Christopher Bauer², Andrey Blazhev¹, Hilde De Witte³, Kerstin Geibel¹, Herbert Hess¹, Malin Klintefjord⁴, Janne Pakarinen⁵, Elisa Rapisarda^3,6, Peter Reiter¹, Michael Seidlitz¹, Marcus Scheck⁷, David Schneiders¹, Tim Steinbach¹, Didier Voulot⁶, Nigel Warr¹ und Frederik Wenander⁶ — ¹IKP, Universität zu Köln — ²IKP, TU Darmstadt — ³KU Leuven — ⁴University of Oslo — ⁵University of Jyväskylä — ⁶CERN, Genf — ⁷University of the West of Scotland, Paisley

Potassium isotopes in the direct vicinity of doubly-magic nuclei are of great interest and subject of recent shell model calculations. These show that the ground states of most K isotopes are dominated by a π0p0h configuration, while ⁴⁷K and ⁴⁹K have a major π2p2h contribution. However, the situation is not clear for the odd-odd isotope ⁴⁸K, which shows a mixture between 0p0h and 2p2h. In order to study the coupling between the ν p_3/2-shell and the π s_1/2-, π d_3/2-shells, transition matrix elements are deduced from a Coulomb excitation experiment performed with MINIBALL at REX-ISOLDE. A ¹⁰⁴Pd target was irradiated by a radioactive ⁴⁸K beam. γ rays of both target and projectile deexcitation have been observed. Those yields, together with available spectroscopic data, allow the detemination of transition matrix elements with GOSIA2. The new findings are compared to shell model calculations.

Supported by BMBF (05P09PKCI5 und 05P12PKFNE)