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Observation of the $$J leq$$ 7/2 low-spin states in $$^{213}$$Fr populated in the electron capture of the 1/2$$^-$$ ground state of $$^{213}$$Ra

Clisu, C.*; Andreyev, A. N.; Nita, C. R.*; 42 of others*

A level scheme of $$^{213}$$Fr, following the EC/$$beta^+$$ decay of its parent, was constructed at CERN's ISOLDE Decay Station. The $$beta$$ decay strength suggests direct population of low-spin ($$J$$=7/2) excited states. Analysis of $$gamma$$-single and $$gamma-gamma$$ coincidences identified new $$gamma$$-ray transitions and states up to $$sim$$3.6 MeV. Spins and parities of these levels, beyond the known (7/2$$^-$$) state, were assigned based on $$N$$=126 isotone systematics and compared to shell-model calculations. A new isomer with a half-life of 26(3)~ns was also found.

Language

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English

Journal

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Physical Review C

Volume

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110

Number

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6

Pages

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p.064315_1 - 064315_15

Publication Year/Month

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2024/12

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Paper URL

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https://doi.org/10.1103/PhysRevC.110.064315

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Press Release

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Percentile:51.65

Category:Physics, Nuclear

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