Article

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. MaierThe Institute of Nuclear Physics, PL-31-342, Krakw, PolandP. H. ReganDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomD. RudolphDepartment of Physics, Lund University, S-22100, Lund SwedenA. B. GarnsworthyDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomR. 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. KojouharovGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyN. KurzGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyF. MontesGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyW. ProkopwiczGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyTakehiko SaitoGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyH. 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. PfütznerPolish Academy of SciencesT. Kurtukian-NietoUniversidad de Santiago de Compostela, Santiago de Campostela, SpainG. BenzoniINFN sezione di Milano, I-20133, Milano, ItalyA. 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. BrownDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomA. M. BruceSchool of Engineering, University of Brighton, Brighton, BN2 4GJ, United KingdomW. 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. GelletlyDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomG. IlieIKP, Universitt zu Kln, D-50937, Kln, GermanyJ. JolieIKP, Universitt zu Kln, D-50937, Kln, GermanyG. A. C. JonesDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomM. KmiecikThe Institute of Nuclear Physics, PL-31-342, Krakw, PolandF. 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, Krakw, PolandS. MyalskiThe Institute of Nuclear Physics, PL-31-342, Krakw, PolandS. SchwertelPhysik Department E12, Technische Universitt Mnchen, Garching, GermanyT. ShizumaDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomP. M. WalkerDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United KingdomE. Werner-MalentoGSI, Planckstrasse 1, D-64291, Darmstadt, GermanyO. WielandDepartment of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom

Physical Review Cjournal2011lv

ABI

Abstract

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.

Topics

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

Identifiers

DOI: 10.1103/physrevc.84.044313

Citations and references

Cited by 058 references

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