Superdeformation in the Doubly Magic Nucleus<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>C</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow><mml:mn>20</mml:mn></mml:mrow><mml:mrow><mml:mn>40</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>a</mml:mi></mml:mrow><mml:mrow><mml:mn>20</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
E. IdeguchiChemistry Department, Washington University, St. Louis, Missouri 63130, USAD. G. SarantitesChemistry Department, Washington University, St. Louis, Missouri 63130W. ReviolChemistry Department, Washington University, St. Louis, Missouri 63130A. V. AfanasjevLaboratory of Radiation Physics, University of Latvia, LV2169, Miera str. 31, LatviaM. DevlinChemistry Department, Washington University, St. Louis, Missouri 63130C. BaktashPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6371R. V. F. JanssensPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439D. RudolphDepartment of Physics, Lund University, S-22100 Lund, SwedenA. AxelssonThe Svedberg Laboratory and Department of Radiation Science, Uppsala University, S-75121 Uppsala, SwedenM. P. CarpenterPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439A. Galindo-UribarriPhysics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831-6371D. R. LaFosseDepartment of Physics and Astronomy, SUNY-Stony Brook, New York 11794T. LauritsenPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439F. LermaChemistry Department, Washington University, St. Louis, Missouri 63130C. J. ListerPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439P. ReiterPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439D. SeweryniakPhysics Division, Argonne National Laboratory, Argonne, Illinois 60439M. WeiszflogThe Svedberg Laboratory and Department of Radiation Science, Uppsala University, S-75121 Uppsala, SwedenJ. N. WilsonChemistry Department, Washington University, St. Louis, Missouri 63130
2001lv
ABI
Аннотация
A rotational band with seven $\ensuremath{\gamma}$-ray transitions between states with spin $2\ensuremath{\Elzxh}$ and $16\ensuremath{\Elzxh}$ has been observed in the doubly magic, self-conjugate nucleus ${}_{20}^{40}{\mathrm{Ca}}_{20}$. The measured transition quadrupole moment of ${1.80}_{\ensuremath{-}0.29}^{+0.39}e\mathrm{b}$ indicates a superdeformed shape with a deformation ${\ensuremath{\beta}}_{2}{\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.59}_{\ensuremath{-}0.07}^{+0.11}$. The features of this band are explained by cranked relativistic mean field calculations to arise from an 8-particle 8-hole excitation.
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