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Identification and decay of the 0.48 ms 13/2+ isomer in 181Hg

Abstract : A new isomer with a half-life of 0.48(2) ms was identified in the nuclide 181Hg, which was produced in the complete fusion reaction 40Ca+144Sm-->184Pb* at the velocity filter SHIP (GSI, Darmstadt). The isomeric state was tentatively assigned a spin-parity of 13/2+. We propose that this isomer de-excites by a yet unobserved low-energy, strongly converted gamma-ray transition, followed by a newly identified cascade composed of a 90.3 keV M1 and a 71.4 keV E2 gamma-ray transition.
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http://hal.in2p3.fr/in2p3-00431885
Contributor : Sophie Heurteau <>
Submitted on : Friday, November 13, 2009 - 2:13:01 PM
Last modification on : Wednesday, September 16, 2020 - 4:07:55 PM

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A.N. Andreyev, S. Antalic, D. Ackermann, T. E. Cocolios, V. F. Comas, et al.. Identification and decay of the 0.48 ms 13/2+ isomer in 181Hg. Physical Review C, American Physical Society, 2009, 80, pp.044334[6]. ⟨10.1103/PhysRevC.80.044334⟩. ⟨in2p3-00431885⟩

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