Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 58: Structure and Dynamics of Nuclei XI

HK 58.3: Vortrag

Donnerstag, 17. März 2016, 17:15–17:30, S1/01 A03

B(E2) massurement of ¹¹²Sn with NRF — •Marcel Schilling, Tobias Beck, Udo Gayer, Laura Mertes, Haridas Pai, Norbert Pietralla, Philipp C. Ries, Christopher Romig, Volker Werner, and Markus Zweidinger — Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Deutschland

Significant differences in B(E2) values in the Sn isotopic chain exist in literature. Namely, the methods of Coulomb excitation and Doppler shift attenuation yield non-consistent B(E2) excitation strengths. Within this work, the method of nuclear resonance fluorescence (NRF) was used, in order to derive a new B(E2; 2₁⁺ → 0₁⁺) value for ¹¹²Sn. The high precision experiment at the superconducting Darmstadt electron linear accelerator S-DALINAC yields a new value in a model-independent way. A sample of 4428.5 mg of highly enriched ¹¹²Sn (99.995%) was irradiated with a bremsstrahlung photon beam at an endpoint energy of 2.5 MeV. Known level widths from the calibration standards ²⁷Al and ⁵⁹Co were used for photon-flux calibration. The extended target and the finite opening angles were taken into account. First results of the measurements and the evaluation will be presented and discussed.