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Changes in mean-squared charge radii and magnetic moments of $$^{179-184}$$Tl measured by in-source laser spectroscopy

イン・ソース分光測定によって明らかにした$$^{179-184}$$Tl同位体における電荷半径と磁気モーメントの変化

Barzakh, A.*; Andreyev, A.; Cocolios, T. E.*; de Groote, R. P.*; Fedorov, D. V.*; Fedosseev, V. N.*; Ferrer, R.*; Fink, D. A.*; Ghys, L.*; Huyse, M.*; K$"o$ster, U.*; Lane, J.*; Liberati, V.*; Lynch, K. M.*; Marsh, B. A.*; Molkanov, P. L.*; Procter, T. J.*; Rapisarda, E.*; Rothe, S.*; Sandhu, K.*; Seliverstov, M. D.*; Sj$'o$din, A. M.*; Van Beveren, C.*; Van Duppen, P.*; Venhart, M.*; Veselsk$'y$, M.*

Barzakh, A.*; Andreyev, A.; Cocolios, T. E.*; de Groote, R. P.*; Fedorov, D. V.*; Fedosseev, V. N.*; Ferrer, R.*; Fink, D. A.*; Ghys, L.*; Huyse, M.*; K$"o$ster, U.*; Lane, J.*; Liberati, V.*; Lynch, K. M.*; Marsh, B. A.*; Molkanov, P. L.*; Procter, T. J.*; Rapisarda, E.*; Rothe, S.*; Sandhu, K.*; Seliverstov, M. D.*; Sj$'o$din, A. M.*; Van Beveren, C.*; Van Duppen, P.*; Venhart, M.*; Veselsk$'y$, M.*

Hyperfine structure and isotope shifts have been measured for the ground and isomeric states in the neutron deficient isotopes $$^{179-184}$$Tl using the 276.9 nm transition. The experiment has been performed at the CERN Isotope Separator On-Line facility using the in-source resonance-ionization laser spectroscopy technique. Spins for the ground states in $$^{179,181,183}$$Tl have been determined as $$I$$ = 1/2. Magnetic moments and changes in the nuclear mean-square charge radii have been deduced. By applying the additivity relation for magnetic moments of the odd-odd Tl nuclei the leading configuration assignments were confirmed. A deviation of magnetic moments for isomeric states in $$^{182,184}$$Tl from the trend of the heavier Tl nuclei is observed. The charge radii of the ground states of the isotopes $$^{179-184}$$Tl follow the trend for isotonic (spherical) lead nuclei. The noticeable difference in charge radii for ground and isomeric states of $$^{183,184}$$Tl has been observed, suggesting a larger deformation for the intruder-based 9/2$$^{-}$$ and 10$$^{-}$$ states compared to the ground states. An unexpected growth of the isomer shift for $$^{183}$$Tl has been found.

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パーセンタイル:8.11

分野:Physics, Nuclear

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