Maqola

Collective and quasiparticle excitations in superdeformed<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Hg</mml:mi></mml:mrow><mml:mprescripts/><mml:mrow/><mml:mrow><mml:mn>190</mml:mn></mml:mrow><mml:mrow/><mml:mrow/></mml:mmultiscripts></mml:mrow></mml:math>

A. N. WilsonInstitute de Physique Nucléaire, Institut National de Physique Nucléare et de Physique des Particles-CNRS bâtiment 104-108, F-91405 Orsay Cedex, FranceJ. TimárCentre de Recherches Nucleaires, F-67037 Strasbourgiment Cedex, FranceJ. F. Sharpey‐SchaferOliver Lodge Laboratory, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, United KingdomB. CrowellOliver Lodge Laboratory, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, United KingdomM. P. CarpenterInstitute de Physique Nucléaire, Institut National de Physique Nucléare et de Physique des Particles-CNRS bâtiment 104-108, F-91405 Orsay Cedex, FranceR. V. F. JanssensOliver Lodge Laboratory, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, United KingdomD. J. BlumenthalCentre de Spectrométric Nucléaire et de Spectrometric de Masse, Institute National de Physique Nucléaire et de Physique des Particles-CNRS bâtiment 104, F-91406 Orsay Cedex, FranceI. AhmadAECL, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0A. AstierInstitut de Physique Nucléaire Lyon, Institut National de Physique Nucléare et de Physique des Particles-CNRS, Lyon, F-69622 Villeurbanne, FranceF. AzaiezAECL, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0M. BergströmInstitute de Physique Nucléaire, Institut National de Physique Nucléare et de Physique des Particles-CNRS bâtiment 104-108, F-91405 Orsay Cedex, FranceL. DucrouxArgonne National Laboratory, Argonne, Illinois 60439Б. ГаллAECL, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0F. HannachiCentre de Recherches Nucleaires, F-67037 Strasbourgiment Cedex, FranceT. L. KhooInstitute de Physique Nucléaire, Institut National de Physique Nucléare et de Physique des Particles-CNRS bâtiment 104-108, F-91405 Orsay Cedex, FranceA. KorichiCentre de Recherches Nucleaires, F-67037 Strasbourgiment Cedex, FranceT. LauritsenCentre de Recherches Nucleaires, F-67037 Strasbourgiment Cedex, FranceА. Лопез-МартенсAECL, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0M. MeyerArgonne National Laboratory, Argonne, Illinois 60439D. NisiusAECL, Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0E. S. PaulInstitut de Physique Nucléaire Lyon, Institut National de Physique Nucléare et de Physique des Particles-CNRS, Lyon, F-69622 Villeurbanne, FranceM.-G. PorquetInstitut de Physique Nucléaire Lyon, Institut National de Physique Nucléare et de Physique des Particles-CNRS, Lyon, F-69622 Villeurbanne, FranceN. RedonCentre de Recherches Nucleaires, F-67037 Strasbourgiment Cedex, FranceJ. N. WilsonCentre de Recherches Nucleaires, F-67037 Strasbourgiment Cedex, FranceTakashi NakatsukasaArgonne National Laboratory, Argonne, Illinois 60439

1996lv

ABI

Annotatsiya

Superdeformed (SD) states of $^{190}\mathrm{Hg}$ have been studied with the Eurogam Phase 2 \ensuremath{\gamma}-ray spectrometer using the $^{160}\mathrm{Gd}$${(}^{34}$S,4n) reaction. Two new excited SD bands have been found and identified as belonging to this nucleus, bringing the total number of SD bands in $^{190}\mathrm{Hg}$ to 4. One of the new bands has a dynamic moment of inertia that is very similar to that of the yrast SD band of $^{190}\mathrm{Hg}$ and most other SD bands in the A\ensuremath{\sim}190 region. In contrast, the other band has a dynamic moment of inertia which is mainly constant as a function of rotational frequency and exhibits a dramatic increase at the lowest frequencies. The observed dynamic moments of inertia are compared with the results of random phase approximation calculations based on the cranked shell model. Finally, the known excited SD band has been extended towards lower frequencies and new transitions have been found linking this band to the yrast SD band. The extracted B(E1) values of the new linking transitions give further support for the possible octupole vibrational character of this band. \textcopyright{} 1996 The American Physical Society.

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DOI: 10.1103/physrevc.54.559

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