Precision measurement of the E2 transition strength to the 21+ state of C12
| Autor: | P. von Neumann-Cosel, A. D'Alessio, Johann Isaak, Klaus Vobig, T. Klaus, T. Hüther, J. Birkhan, Norbert Pietralla, Lars Jürgensen, S. Bassauer, M. Mathy, V. Yu. Ponomarev, I. Brandherm, T. Mongelli, G. Steinhilber, M. Hilcker, Michaela Arnold, V. Werner, Robert Roth, M. Singer, P. Ries |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review C. 102 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.102.011302 |
| Popis: | The form factor of the electromagnetic excitation of $^{12}\mathrm{C}$ to its ${2}_{1}^{+}$ state was measured at extremely low momentum transfers in an electron-scattering experiment at the Superconducting Darmstadt Electron Linear Accelerator (S-DALINAC). A combined analysis with the world form-factor data results in a reduced transition strength $B(E2;{2}_{1}^{+}\ensuremath{\rightarrow}{0}_{1}^{+})=7.63(19)\phantom{\rule{4pt}{0ex}}{e}^{2}\phantom{\rule{0.16em}{0ex}}{\mathrm{fm}}^{4}$ with an accuracy improved to 2.5%. In-medium no-core shell-model results with interactions derived from chiral effective field theory are able to reproduce the result. A quadrupole moment $Q({2}_{1}^{+})=5.97(30)\phantom{\rule{4pt}{0ex}}e\phantom{\rule{0.16em}{0ex}}{\mathrm{fm}}^{2}$ can be extracted from the strict correlation with the $B(E2)$ strength emerging in the calculations. |
| Databáze: | OpenAIRE |
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