Article

Comparison of superdeformed bands in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>61</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Zn</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>60</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">Zn</mml:mi></mml:math>: Possible evidence for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mn>0</mml:mn><mml:mn/></mml:math>pairing

C.-H. YuPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831C. BaktashPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831J. DobaczewskiInstitute of Theoretical Physics, Warsaw University, Hoża 69, PL-00681 Warsaw, PolandJ. A. CameronDepartment of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1C. ChituInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyM. DevlinChemistry Department, Washington University, St. Louis, Missouri 63130J. EberthInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyA. Galindo-UribarriPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831D. S. HaslipDepartment of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1D. R. LaFosseChemistry Department, Washington University, St. Louis, Missouri 63130T. J. LampmanDepartment of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1I.-Y. LeeNuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720F. LermaChemistry Department, Washington University, St. Louis, Missouri 63130A. O. MacchiavelliNuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720S. D. PaulOak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831D. C. RadfordPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831D. RudolphDepartment of Physics, Lund University, S-22100 Lund, SwedenD. G. SarantitesChemistry Department, Washington University, St. Louis, Missouri 63130C. E. SvenssonDepartment of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1J. C. WaddingtonDepartment of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1J. N. WilsonChemistry Department, Washington University, St. Louis, Missouri 63130

1999lv

ABI

Abstract

The yrast superdeformed band in ${}^{61}\mathrm{Zn}$ has been established using ${}^{28}\mathrm{Si}{(}^{36}\mathrm{Ar},$ ${2pn)}^{61}\mathrm{Zn}$ and ${}^{40}\mathrm{Ca}{(}^{29}\mathrm{Si},$ $2\ensuremath{\alpha}{)}^{61}\mathrm{Zn}$ fusion-evaporation reactions. The excitation energy of this band was determined via two transitions that link this band to the normally deformed states. Lifetime analysis of this band resulted in a quadrupole moment of ${Q}_{t}=3.0{\ifmmode\pm\else\textpm\fi{}}_{0.4}^{0.5}e\mathrm{b},$ which corresponds to a deformation of ${\ensuremath{\beta}}_{2}=0.50{\ifmmode\pm\else\textpm\fi{}}_{0.06}^{0.07}.$ A comparison of the ${J}^{(2)}$ dynamical moments of inertia of the yrast superdeformed band in ${}^{61}\mathrm{Zn}$ with those in ${}^{60}\mathrm{Zn}$ shows a nearly complete blocking of the observed alignment in ${}^{60}\mathrm{Zn},$ indicating that $T=0$ proton-neutron pair correlations may be present in ${}^{60}\mathrm{Zn}.$

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Identifiers

DOI: 10.1103/physrevc.60.031305

Citations and references

Cited by 40 references

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