Measurement of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi></mml:math>Factor for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>1.1</mml:mn><mml:mo>−</mml:mo><mml:mi>μ</mml:mi><mml:mrow><mml:mo>sec</mml:mo></mml:mrow></mml:math>Shape Isomeric State in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Pu</mml:mi></mml:mrow><mml:mp

Kalish, R.; Herskind, B.; Pedersen, Jens Olaf Pepke; Shackleton, D.; Strabo, L.

doi:10.1103/physrevlett.32.1009

Cited by 33 publications

(8 citation statements)

References 3 publications

(2 reference statements)

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“…3 suggests interpreting the three low-energy transitions as cascade and crossover transitions within a rotational band. The rotational energy expansion 2 involves three unknown parameters: the spin I Q =K of the fission isomer, the rotational constant A = h 2 /29 related to the moment of inertia 0, and the coefficient B of the second-order term describing the perturbation of the band. If one assumes spins of | to ~ for the fission isomer, a fit of the observed transition energies yields the values of A and B listed in Table I (Ref.…”

Section: Spectroscopy In the Second Minimum Of The Potential Energy Smentioning

confidence: 99%

Spectroscopy in the Second Minimum of the Potential Energy Surface ofPu239

et al. 1979

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Conversion electrons from the decay of a spin isomer in the secondary minimum of 239 Pu have been measured. They are interpreted as transitions feeding and depopulating a rotational band built on the fission isomeric ground state with spin f. Rotational parameters of A = 3.36 ±0.10 keV and B =4 ±3 eV have been deduced. The observed upper limit on the M1/E2 mixing ratio of 1.4 suggests an antiparallel coupling between orbital angular momentum and spin vectors for the wave function of the fission isomer.Up to now single-particle models have not been crucially tested at large deformations of shape isomers (/3=t).6). Earlier attempts to identify single-particle states were based on measurements of fission-fragment angular distributions 1 and g factors 2 of the fissioning isomers in 237 Pu. This Letter reports on the identification of states in the second minimum of 239 Pu by observing conversion electrons feeding and depopulating the rotational band built on the fission isomeric state. Delayed feeding occurs from a T 1 / 2 = 2.6t*'£ ns spin isomer which on the average emits 1.6 conversion electrons in its decay to the 8-JUS fission isomer. 3 From the energies and theMl/E2 mixing ratio of the rotational transitions the spin and single-particle configuration of the fission isomer can be inferred. With the use of this information a more accurate value for the quadrupole moment is derived from previous chargeplunger measurements. 4

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Section: Spectroscopy In the Second Minimum Of The Potential Energy Smentioning

confidence: 99%

Spectroscopy in the Second Minimum of the Potential Energy Surface ofPu239

et al. 1979

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“…The moment of inertia of the fission isomer of z40Pu was measured by Specht et al [2]. The gyromagnetic ratios of two fission isomeric states of 237Pu, measured by Kalish et al [3] and Shackleton et al [4], are discussed in sect. 3.…”

Section: Introductionmentioning

confidence: 91%

Nuclear Moments of Present Interest to Nuclear Theory

Kumar

1975

Phys. Scr.

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The magnetic moments of the first 3/2+ states of 203, 205, 207Tl are discussed in terms of mesonic-exchange and configuration-mixing corrections. The gyromagnetic ratios of two fission isomeric states of 237Pu are discussed in terms of Nilsson states for the second well in the potential energy surface. The gyromagnetic ratios of high spin states of 164Er and 160Dy are discussed in terms of Coriolis-Anti-Pairing and Rotation-Alignment theories. A new type of seniority quantum number, related to the number of nucleons in time-reversal-conjugate states, is proposed as an explanation for the occurrence of rotational-type quadrupole moments in deformed as well as spherical nuclei. Further tests of this seniority classification are suggested on the basis of the quadrupole moments of high-spin states and first 3+ states.

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“…Unfortunately, these data are obtained for the neutron numbers around N=146 where earlier the s.p. states of 23w,94[.u143 have been determined [8,10]. The more complete test of the SO potential at large deformations can be achieved only if the s.p.…”

Section: The Average Potential At Large Deformationsmentioning

confidence: 99%

An investigation of the tensor force effects on the spin-orbit splitting in spherical and very deformed nuclei

Płoszajczak

Faber

1981

Z Physik A

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A contribution of the tensor force to the phenomenological spin-orbit (SO) potential in the single-particle Hamiltonian is studied for spherical and deformed rare-earth and actinide nuclei. It is found that the deformation dependence of the SO coupling constant, suggested by the second order tensor force contribution, enables to explain the observed single particle (s.p.) states in the second minimum of 237pu and 239pu using a SO strength weaker than usually applied. Consequences of the tensor contributions for the stability of the Z = 114 superheavy nucleus are studied.

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Measurement of thegFactor for the1.1−μsecShape Isomeric State inPu

Cited by 33 publications

References 3 publications

Spectroscopy in the Second Minimum of the Potential Energy Surface ofPu239

Spectroscopy in the Second Minimum of the Potential Energy Surface ofPu239

Nuclear Moments of Present Interest to Nuclear Theory

An investigation of the tensor force effects on the spin-orbit splitting in spherical and very deformed nuclei

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