Optimizing recoil-isomer tagging with the Argonne fragment mass analyzer

A new isomer with a half-life of 0.48(2) ms was identified in the nuclide 181 Hg, which was produced in the complete fusion reaction 40 Ca + 144 Sm → 184 Pb * 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 γ -ray transition, followed by a newly identified cascade composed of a 90.3 keV M1 and a 71.4 keV E2 γ -ray transition.

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Identification and decay of the 0.48 ms13/2+isomer inHg181

Andreyev

Antalic

Ackermann

et al. 2009

Phys. Rev. C

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Optimizing recoil-isomer tagging with the Argonne fragment mass analyzer

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Identification and decay of the 0.48 ms13/2+isomer inHg181

Identification and decay of the 0.48 ms13/2+isomer inHg181

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