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Isomeric states observed in heavy neutron-rich nuclei populated in the fragmentation of a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow/><mml:mn>208</mml:mn></mml:msup></mml:math>Pb beam

S. J. SteerDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomZs. Podolyák#N#University of Surrey#N#S. PiétriDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomM. GórskaGSI Helmholtz Centre for Heavy Ion ResearchH. GraweGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyK. H. MaierUniversity of the West of ScotlandP. H. ReganDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomD. RudolphDepartment of Physics, Lund University, S-22100, Lund SwedenA. B. GarnsworthyWNSL, Yale University, 272 Whitney Avenue, New Haven, Connecticut, 06520, USAR. HoischenDepartment of Physics, Lund University, S-22100, Lund SwedenJ. GerlGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyH. J. WollersheimGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyF. BeckerGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyP. BednarczykGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyL. CáceresLund Univ.#TAB#P. DoornenbalGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyH. GeißelGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyJ. Grȩbosz#N#University of Surrey#N#A. KelićGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyI. KojouharovLund Univ.#TAB#N. KurzGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyF. MontesGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyW. ProkopwiczGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyTakehiko SaitoYale UniversityH. SchaffnerGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyS. TashenovGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyA. HeinzWNSL, Yale University, 272 Whitney Avenue, New Haven, Connecticut, 06520, USAM. PfütznerUniversity of the West of ScotlandT. Kurtukian-NietoYale UniversityG. BenzoniYale UniversityA. JungclausInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainD. L. BalabanskiDipartimento di Fisica, Universit di Camerino and INFN-Perugia, I-62032, ItalyM. BowryDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomC. BrandauDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomA. BrownNSCL, Michigan State University, East Lansing, Michigan 48824-1321, USAA. M. BrucePolish Academy of SciencesW. N. CatfordDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomD. M. CullenDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomZs. DombrádiInstitute for Nuclear Research, H-4001, Debrecen, HungaryM. E. EstévezInstituto de Fisica Corpuscular, Valencia, SpainW. GelletlyUniversity of SurreyG. IlieUniversity of SurreyJ. JolieIKP, Universitt zu Kln, D-50937, Kln, GermanyG. A. C. JonesUniversity of SurreyM. KmiecikPolish Academy of SciencesF. G. KondevNuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USAR. KrückenLund Univ.#TAB#S. LalkovskiFaculty of Physics, University of Sofia "St. Kliment Ohridski," Sofia, BulgariaZ. LiuDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomA. MajThe Institute of Nuclear Physics, PL-31-342, Kraków, PolandS. MyalskiLund Univ.#TAB#S. SchwertelLund Univ.#TAB#T. ShizumaDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomP. M. WalkerDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomE. Werner-MalentoLund Univ.#TAB#O. WielandDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom

Physical Review Cjournal2011lv

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Annotatsiya

Heavy neutron-rich nuclei were populated via the fragmentation of a $E/A=1$ GeV ${}^{208}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{82}$Pb beam. Secondary fragments were separated and identified and subsequently implanted in a passive stopper. By the detection of delayed $\ensuremath{\gamma}$ rays, isomeric decays associated with these nuclei have been identified. A total of 49 isomers were detected, with the majority of them observed for the first time. The newly discovered isomers are in ${}^{204,205}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{80}$Hg, ${}^{201,202,204,205}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{79}$Au, ${}^{197,203,204}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{78}$Pt, ${}^{195,199\ensuremath{-}203}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{77}$Ir, ${}^{193,197\ensuremath{-}199}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{76}$Os, ${}^{196}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{75}$Re, ${}^{190,191}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{74}$W, and ${}^{189}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}\phantom{\rule{-0.16em}{0ex}}{}_{73}$Ta. Possible level schemes are constructed and the structure of the nuclei discussed. To aid the interpretation, shell-model as well as BCS calculations were performed.

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Nuclear physics research studies Astronomical and nuclear sciences Nuclear Physics and Applications

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DOI: 10.1103/physrevc.84.044313

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