Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Structure and Dynamics of Nuclei III
HK 17.5: Vortrag
Montag, 28. März 2022, 17:15–17:30, HK-H6
Investigation of the B(E2; 0gs+→21+) value of 116Sn — •M. Beuschlein1, O. Papst1, J. Kleemann1, V. Werner1, N. Pietralla1, T. Beck1,3, M. Berger1, I. Brandherm1, A. D’Alessio1, U. Friman-Gayer1,2, M. Hilcker1, K. E. Ide1, J. Isaak1, R. Kern1, F. Niederschuh1, P. C. Ries1, G. Steinhilber1, J. Wiederhold1, and R. Zidarova1 — 1IKP, TU Darmstadt — 2Duke University and TUNL, Durham, NC, USA — 3FRIB, East Lansing, MI, USA
The tin isotopes, being proton-magic with a long chain of experimentally accessible nuclei, are an important testing ground for nuclear structure models.
Present data show systematic deviations between measured electric quadrupole (E2) ground-state excitation strengths depending on the used techniques.
Also, various nuclear structure models come to different predictions on the systematics of B(E2) strengths, particulary around 116Sn.
We performed a measurement of 116Sn relative to 112Sn using the nuclear resonance fluorescence method at S-DALINAC at TU Darmstadt.
A beam of continuous bremsstrahlung up to an endpoint energy of 2.2 MeV was used to populate the first excited 2+ states of 112Sn and 116Sn.
Photons of the subsequent de-excitation were measured by three high-purity germanium detectors.
With our relative measurement we aim to provide a test for a predicted dip of E2 strengths around 116Sn [1], and obtain the absolute B(E2) strength from a previous measurement of 112Sn.
Supported by the DFG through the research grant SFB 1245.
[1] T. Togashi et al., Phys. Rev. Lett. 121, 062501 (2018)