Exotic<i>N=82</i>nuclei<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Lu</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>153</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Hf</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>154</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>and filling of the π<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>h</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mn>1</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>subshell
John H. McNeillChemistry Department, Purdue University, West Lafayette, Indiana 47907J. BlomqvistChemistry Department, Purdue University, West Lafayette, Indiana 47907A. A. ChishtiChemistry Department, Purdue University, West Lafayette, Indiana 47907P. J. DalyChemistry Department, Purdue University, West Lafayette, Indiana 47907W. GelletlyChemistry Department, Purdue University, West Lafayette, Indiana 47907M.A.C. HotchkisChemistry Department, Purdue University, West Lafayette, Indiana 47907M. PiiparinenChemistry Department, Purdue University, West Lafayette, Indiana 47907B. J. VarleyChemistry Department, Purdue University, West Lafayette, Indiana 47907P. J. WoodsChemistry Department, Purdue University, West Lafayette, Indiana 47907
1989lv
ABI
Abstract
Microsecond isomers in the very proton-rich N=82 nuclei $^{153}\mathrm{Lu}$ and $^{154}\mathrm{Hf}$ have been identified by \ensuremath{\gamma}-ray spectroscopy following mass analysis of $^{102}\mathrm{Pd}$ +245 MeV $^{54}\mathrm{Fe}$ reaction products using the Daresbury Recoil Separator. The decays of the isomers, interpreted as (\ensuremath{\pi}${h}_{11/2}$${)}^{n}$ states, are characterized. Examination of reduced E2 transition rates between (\ensuremath{\pi}${h}_{11/2}$${)}^{n}$ states in the N=82 isotones indicates that the half-filling of the \ensuremath{\pi}${h}_{11/2}$ subshell occurs just below Z=71.
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Cited by 20 references