Rotations and Vibrations in Deformed Nuclei

Davidson, J. P.

doi:10.1103/revmodphys.37.105

Cited by 127 publications

(49 citation statements)

References 197 publications

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“…Therefore the low lying excited states can be described as members of rotational bands built on vibrational excitations. However, the nuclear structure description of odd actinides is particularly difficult due the coupling between the nuclear rotation with the unpaired nucleon [15][16][17], which does not permit the separation of the single-particle, rotational and vibrational degrees of freedom.…”

Section: The Target Hamiltonian and Nuclear Wave-functionsmentioning

confidence: 99%

A Lane consistent optical model potential for nucleon scattering on actinide nuclei with extended coupling

Quesada

Capote

Soukhovitski

et al. 2016

EPJ Web of Conferences

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Abstract. An extension for odd-A actinides of a previously derived dispersive coupledchannel optical model potential (OMP) for 238 U and 232 Th nuclei is presented. It is used to fit simultaneously all the available experimental databases including neutron strength functions for nucleon scattering on 232 Th , 233,235,238 U and 239 Pu nuclei. Quasi-elastic (p,n) scattering data on 232 Th and 238 U to the isobaric analogue states of the target nucleus are also used to constrain the isovector part of the optical potential. For even-even (odd) actinides almost all low-lying collective levels below 1 MeV (0.5 MeV) of excitation energy are coupled. OMP parameters show a smooth energy dependence and energy independent geometry.

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Section: The Target Hamiltonian and Nuclear Wave-functionsmentioning

confidence: 99%

A Lane consistent optical model potential for nucleon scattering on actinide nuclei with extended coupling

Quesada

Capote

Soukhovitski

et al. 2016

EPJ Web of Conferences

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“…so that in a two-level mixing solution with quadrupole deformation parameters (β 1 , γ 1 ) and (β 2 , γ 2 ) the E0 strength is given by [14,16] …”

Section: Br(e0)mentioning

confidence: 99%

“…The ρ 2 (E0) values can be expressed in terms of the collective variables from the Bohr model. The operator is [16]…”

Section: Br(e0)mentioning

confidence: 99%

Conversion electrons from high-statisticsβ-decay measurements with the 8πspectrometer at TRIUMF-ISAC

et al. 2016

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Abstract. The 8π spectrometer, located at TRIUMF-ISAC, was the world's most powerful spectrometer dedicated to β-decay studies until its decommissioning in early 2014 for replacement with the GRIFFIN array. An integral part of the 8π spectrometer was the Pentagonal Array for Conversion Electron Spectroscopy (PACES) consisting of 5 Si(Li) detectors used for charged-particle detection. PACES enabled both γ − e − and e − − e − coincidence measurements, which were crucial for increasing the sensitivity for discrete e − lines in the presence of large backgrounds. Examples from a 124 Cs decay experiment, where the data were vital for the expansion of the 124 Cs m decay scheme, are shown. With sufficient statistics, measurements of conversion coefficients can be used to extract the E0 components of J π → J π transitions for J 0, which is demonstrated for data obtained in 110 In→ 110 Cd decay. With knowledge of the shapes of the states involved, as obtained, for example, from the use of Kumar-Cline shape invariants, the mixing of the states can be extracted.

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“…Here we make the following important assumptions originally imposed in [9]: (i) The quantum number K takes only even values (see also [6,10,12]). Then in (13) the sum over K runs from 0 to I in steps of 2.…”

Section: Triaxial Quadrupole-octupole Rotor In Adiabatic Approximationmentioning

confidence: 99%

“…The distance between the center of the deformed nucleus and its surface in the direction of the polar angles θ, ϕ in the laboratory frame x, y, z is given by the expression [1,3,10,11,4]:…”

Section: Introductionmentioning

confidence: 99%

Application of the triaxial quadrupole–octupole rotor to the ground and negative-parity levels of actinide nuclei

Nadirbekov

Minkov

Strecker

et al. 2016

Int. J. Mod. Phys. E

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In this work we examine the possibility to describe yrast positive-and negativeparity excitations of deformed even-even nuclei through a collective rotation model in which the nuclear surface is characterized by triaxial quadrupole and octupole deformations. The nuclear moments of inertia are expressed as sums of quadrupole and octupole parts. By assuming an adiabatic separation of rotation and vibration degrees of freedom we suppose that the structure of the positive-and negative-parity bands may be determined by the triaxial-rigid-rotor motion of the nucleus. By diagonalizing the Hamiltonian in a symmetrized rotor basis with embedded parity we obtain a model description for the yrast positive-and negative-parity bands in several actinide nuclei. We show that the energy displacement between the opposite-parity sequences can be explained as the result of the quadrupole-octupole triaxiality.

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Rotations and Vibrations in Deformed Nuclei

Cited by 127 publications

References 197 publications

A Lane consistent optical model potential for nucleon scattering on actinide nuclei with extended coupling

A Lane consistent optical model potential for nucleon scattering on actinide nuclei with extended coupling

Conversion electrons from high-statisticsβ-decay measurements with the 8πspectrometer at TRIUMF-ISAC

Application of the triaxial quadrupole–octupole rotor to the ground and negative-parity levels of actinide nuclei

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