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Isomeric states in 214Th and 213Th

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Abstract.

Isomeric states in 214Th and 213Th were identified by means of γ -rays measured in delayed coincidence with the implanted evaporation residues. These were produced in irradiations of 164Dy with 54Cr projectiles and separated in-flight by the velocity filter SHIP. An isomeric state of I π = 8+ with a half-life of (1.24±0.12) μs was identified in 214Th . The configuration π[1h 9/2 ⊗ 2f 7/2] was assigned to this state. An isomeric state with a half-life of (1.4±0.4) μs was observed in 213Th . Tentatively it was assigned to an I π = 13/2+ state.

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Khuyagbaatar, J., Hofmann, S., Heßberger, F.P. et al. Isomeric states in 214Th and 213Th . Eur. Phys. J. A 34, 355–361 (2007). https://doi.org/10.1140/epja/i2007-10512-5

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