Mainz 2012 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Struktur und Dynamik von Kernen

HK 20.4: Vortrag

Dienstag, 20. März 2012, 17:30–17:45, P 4

Search for mixed-symmetry states in ⁹⁸Mo — •Tim Thomas^1,2, Volker Werner², Tan Ahn², Christian Bernards^1,2, Nathan Cooper², Matthew Hinton^2,3, Gabriela Ilie^2,4, Jan Jolie¹, and Desiree Radeck¹ — ¹IKP, Universität zu Köln — ²WNSL, Yale University, USA — ³University of Surrey, UK — ⁴NIPNE, Măgurele-Ilfov, Români

In the framework of the sdf-IBM-2 excited 2+ and 3- mixed-symmetry states are predicted in the molybdenum isotopes [1,2]. Signatures for these states are strong M1 decays to the first excited 2+ state or to the first excited octupole state, respectively. Therefore, the knowledge of multipole mixing ratios is essential. In search for such signatures we investigated ⁹⁸Mo populated via the reaction ⁹⁶Zr(α, 2n) at the Wright Nuclear Structure Laboratory. The depopulating γ transitions were detected with the highly efficient Yrast Ball γ spectrometer which allowed for the analysis of the γ γ angular correlation analysis. We present multipole mixing ratios, spins and branching ratios and discuss the results in comparison with neighboring nuclei.
[1] N. A. Smirnova et al., Nucl. Phys. A 678, 235 (2000)
[2] M. Scheck et al., Phys. Rev. C 81, 064305 (2010)