Isomers and seniority in the trans-Pb nuclei

doi:10.1088/0954-3899/31/10/041

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Journal of Physics G: Nuclear and Particle Physics

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Journal of Physics G: Nuclear and Particle Physics Volume 31 Number 10 Create an alert RSS this journal

J J Ressler et al 2005 J. Phys. G: Nucl. Part. Phys. 31 S1605 doi:10.1088/0954-3899/31/10/041

Isomers and seniority in the trans-Pb nuclei

J J Ressler^1,2, C W Beausang^1,3, R F Casten¹, N V Zamfir^1,4, H Ai¹, H Amro^1,5, M Babilon^1,6, R B Cakirli^1,7, J A Caggiano^1,8, G Gürdal^1,9, A Heinz¹, R O Hughes^1,10, S D Langdown^1,10, E A McCutchan¹, D A Meyer¹, C Plettner¹, J Qian¹, P H Regan^1,10, M J S Sciacchitano¹, N J Thomas^1,10, E Williams¹ and A Yamamoto^1,10

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jressler@sfu.ca

¹ A W Wright Nuclear Structure Laboratory, Yale University, New Haven, CT 06520, USA
² Department of Chemistry, Simon Fraser University, Burnaby, BC V5A-1S6, Canada
³ Department of Physics, University of Richmond, Richmond, VA 23173, USA
⁴ National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania
⁵ Department of Physics, University of Notre Dame, South Bend, IN 46556, USA
⁶ Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
⁷ Istanbul University, 34459 Vezneciler-Istanbul, Turkey
⁸ TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T-2A3, Canada
⁹ Clark University, Worcester, MA 01610, USA
¹⁰ Department of Physics, University of Surrey, Guilford, Surrey, GU2 7XH, UK

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Abstract References

Low-energy excited states of ²¹⁰Ra and ²⁰⁸Ra were investigated at the Wright Nuclear Structure Laboratory of Yale University. Fusion evaporation recoils were selected using the gas-filled spectrometer, SASSYER. Delayed γ-rays, following isomeric decays, were detected at the focal plane of SASSYER with a small array of HPGe detectors. Transitions following the proposed J^π = 8⁺ isomers were observed, and the half-lives measured. The experiments are discussed and results compared to expectations from the seniority scheme.

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