Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones

A. P. Robinson; T. L. Khoo; I. Ahmad; S. K. Tandel; F. G. Kondev; T. Nakatsukasa; D. Seweryniak; M. Asai; B. B. Back; M. P. Carpenter; P. Chowdhury; C. N. Davids; S. Eeckhaudt; J. P. Greene; P. T. Greenlees; S. Gros; A. Heinz; R. D. Herzberg; R. V.F. Janssens; G. D. Jones; T. Lauritsen; C. J. Lister; D. Peterson; J. Qian; U. S. Tandel; X. Wang; S. Zhu

doi:10.1103/PhysRevC.78.034308

Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones

A. P. Robinson, T. L. Khoo, I. Ahmad, S. K. Tandel, F. G. Kondev, T. Nakatsukasa, D. Seweryniak, M. Asai, B. B. Back, M. P. Carpenter, P. Chowdhury, C. N. Davids, S. Eeckhaudt, J. P. Greene, P. T. Greenlees, S. Gros, A. Heinz, R. D. Herzberg, R. V.F. Janssens, G. D. JonesT. Lauritsen, C. J. Lister, D. Peterson, J. Qian, U. S. Tandel, X. Wang, S. Zhu

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Abstract

Isomers have been populated in Cm246 and No252 with quantum numbers Kπ=8-, which decay through Kπ=2- rotational bands built on octupole vibrational states. For N=150 isotones with (even) atomic number Z=94-102, the Kπ=8- and 2- states have remarkably stable energies, indicating neutron excitations. An exception is a singular minimum in the 2- energy at Z=98, due to the additional role of proton configurations. The nearly constant energies, in isotones spanning an 18% increase in Coulomb energy near the Coulomb limit, provide a test for theory. The two-quasiparticle Kπ=8- energies are described with single-particle energies given by the Woods-Saxon potential and the Kπ=2- vibrational energies by quasiparticle random-phase approximation calculations. Ramifications for self-consistent mean-field theory are discussed.

Original language	English
Article number	034308
Journal	Physical Review C - Nuclear Physics
Volume	78
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.78.034308
Publication status	Published - Sept 15 2008
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.78.034308

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Robinson, A. P., Khoo, T. L., Ahmad, I., Tandel, S. K., Kondev, F. G., Nakatsukasa, T., Seweryniak, D., Asai, M., Back, B. B., Carpenter, M. P., Chowdhury, P., Davids, C. N., Eeckhaudt, S., Greene, J. P., Greenlees, P. T., Gros, S., Heinz, A., Herzberg, R. D., Janssens, R. V. F., ... Zhu, S. (2008). Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones. Physical Review C - Nuclear Physics, 78(3), [034308]. https://doi.org/10.1103/PhysRevC.78.034308

Robinson, AP, Khoo, TL, Ahmad, I, Tandel, SK, Kondev, FG, Nakatsukasa, T, Seweryniak, D, Asai, M, Back, BB, Carpenter, MP, Chowdhury, P, Davids, CN, Eeckhaudt, S, Greene, JP, Greenlees, PT, Gros, S, Heinz, A, Herzberg, RD, Janssens, RVF, Jones, GD, Lauritsen, T, Lister, CJ, Peterson, D, Qian, J, Tandel, US, Wang, X & Zhu, S 2008, 'Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones', Physical Review C - Nuclear Physics, vol. 78, no. 3, 034308. https://doi.org/10.1103/PhysRevC.78.034308

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title = "Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones",

abstract = "Isomers have been populated in Cm246 and No252 with quantum numbers Kπ=8-, which decay through Kπ=2- rotational bands built on octupole vibrational states. For N=150 isotones with (even) atomic number Z=94-102, the Kπ=8- and 2- states have remarkably stable energies, indicating neutron excitations. An exception is a singular minimum in the 2- energy at Z=98, due to the additional role of proton configurations. The nearly constant energies, in isotones spanning an 18% increase in Coulomb energy near the Coulomb limit, provide a test for theory. The two-quasiparticle Kπ=8- energies are described with single-particle energies given by the Woods-Saxon potential and the Kπ=2- vibrational energies by quasiparticle random-phase approximation calculations. Ramifications for self-consistent mean-field theory are discussed.",

author = "Robinson, {A. P.} and Khoo, {T. L.} and I. Ahmad and Tandel, {S. K.} and Kondev, {F. G.} and T. Nakatsukasa and D. Seweryniak and M. Asai and Back, {B. B.} and Carpenter, {M. P.} and P. Chowdhury and Davids, {C. N.} and S. Eeckhaudt and Greene, {J. P.} and Greenlees, {P. T.} and S. Gros and A. Heinz and Herzberg, {R. D.} and Janssens, {R. V.F.} and Jones, {G. D.} and T. Lauritsen and Lister, {C. J.} and D. Peterson and J. Qian and Tandel, {U. S.} and X. Wang and S. Zhu",

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T1 - Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones

AU - Robinson, A. P.

AU - Khoo, T. L.

AU - Ahmad, I.

AU - Tandel, S. K.

AU - Kondev, F. G.

AU - Nakatsukasa, T.

AU - Seweryniak, D.

AU - Asai, M.

AU - Back, B. B.

AU - Carpenter, M. P.

AU - Chowdhury, P.

AU - Davids, C. N.

AU - Eeckhaudt, S.

AU - Greene, J. P.

AU - Greenlees, P. T.

AU - Gros, S.

AU - Heinz, A.

AU - Herzberg, R. D.

AU - Janssens, R. V.F.

AU - Jones, G. D.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - Peterson, D.

AU - Qian, J.

AU - Tandel, U. S.

AU - Wang, X.

AU - Zhu, S.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - Isomers have been populated in Cm246 and No252 with quantum numbers Kπ=8-, which decay through Kπ=2- rotational bands built on octupole vibrational states. For N=150 isotones with (even) atomic number Z=94-102, the Kπ=8- and 2- states have remarkably stable energies, indicating neutron excitations. An exception is a singular minimum in the 2- energy at Z=98, due to the additional role of proton configurations. The nearly constant energies, in isotones spanning an 18% increase in Coulomb energy near the Coulomb limit, provide a test for theory. The two-quasiparticle Kπ=8- energies are described with single-particle energies given by the Woods-Saxon potential and the Kπ=2- vibrational energies by quasiparticle random-phase approximation calculations. Ramifications for self-consistent mean-field theory are discussed.

AB - Isomers have been populated in Cm246 and No252 with quantum numbers Kπ=8-, which decay through Kπ=2- rotational bands built on octupole vibrational states. For N=150 isotones with (even) atomic number Z=94-102, the Kπ=8- and 2- states have remarkably stable energies, indicating neutron excitations. An exception is a singular minimum in the 2- energy at Z=98, due to the additional role of proton configurations. The nearly constant energies, in isotones spanning an 18% increase in Coulomb energy near the Coulomb limit, provide a test for theory. The two-quasiparticle Kπ=8- energies are described with single-particle energies given by the Woods-Saxon potential and the Kπ=2- vibrational energies by quasiparticle random-phase approximation calculations. Ramifications for self-consistent mean-field theory are discussed.

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Kπ=8- isomers and Kπ=2- octupole vibrations in N=150 shell-stabilized isotones

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