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Laser spectroscopy of neutron-rich $$^{207,208}$$Hg isotopes; Illuminating the kink and odd-even staggering in charge radii across the $$N$$ = 126 shell closure

中性子過剰$$^{207,208}$$Hg同位体のレーザー分光; 126中性子閉殻をまたぐ原子核電荷半径の急変と偶奇変動の解明

Day Goodacre, T.*; Afanasjev, A. V.*; Barzakh, A. E.*; Marsh, B. A.*; Sels, S.*; Ring, P.*; 中田 仁*; Andreyev, A. N.; 他36名*

Day Goodacre, T.*; Afanasjev, A. V.*; Barzakh, A. E.*; Marsh, B. A.*; Sels, S.*; Ring, P.*; Nakada, Hitoshi*; Andreyev, A. N.; 36 of others*

The charge radii of $$^{207,208}$$Hg have been studied for the first time and those of $$^{202,203,206}$$Hg remeasured by laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the $$N$$ = 126 shell closure has been revealed, providing the first information on its behavior below the $$Z$$ = 82 shell closure. By a theoretical analysis, it is demonstrated, contrary to previous interpretations, that both the kink at $$N$$ = 126 and the odd-even staggering can be described predominantly at the mean-field level and that pairing does not need to play a crucial role in their origin.

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パーセンタイル:87.23

分野:Physics, Multidisciplinary

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