First isomeric quadrupole moment measured in fragmentation reactions: The case ofFe61m(9/2+)
| Autor: | L. Perrot, Yu. Sobolev, S. K. Chamoli, Sophie Péru, O. Roig, Fred Sarazin, P. Morel, J. M. Daugas, D. L. Balabanski, F. De Oliveira-Santos, O. Perru, B. S. Nara Singh, Michel Girod, N. Vermeulen, Michael Hass, G. S. Simpson, I. Matea, Yu. E. Penionzkevich, C. Stodel, S. Grévy, Deyan Yordanov, H. Goutte, J. P. Delaroche, I. Stefan, G. Goldring, Georgi P. Georgiev, Gerda Neyens |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Physical Review C. 75 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.75.051302 |
| Popis: | This paper demonstrates the feasibility of quadrupole moment measurements on isomeric levels populated in projectile fragmentation reactions. The neutron-rich $^{61}\mathrm{Fe}$$(9/{2}^{+})$ [${E}^{*}=$ 861 keV, ${T}_{1/2}=$ 239(5) ns] isomer was produced and spin aligned by the intermediate energy fragmentation of a $^{64}\mathrm{Ni}$ beam and implanted in a Cd single crystal. Its spectroscopic quadrupole moment $|{Q}_{s}|=41(6)\phantom{\rule{0.3em}{0ex}}e\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{2}$ agrees with mean-field based calculations using the finite-range Gogny force, suggesting a moderately deformed shape characterized by an intrinsic charge quadrupole moment ${Q}_{0}=\ensuremath{-}85\phantom{\rule{0.3em}{0ex}}e\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{2}$ or ${Q}_{0}=+115\phantom{\rule{0.3em}{0ex}}e\phantom{\rule{0.3em}{0ex}}{\mathrm{fm}}^{2}$. The present measurement paves the way for future determinations of isomeric quadrupole moments in more exotic nuclei. |
| Databáze: | OpenAIRE |
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