Multiple octupole-type band structures in Th220: Reflection-asymmetric tidal waves?

W. Reviol; C. J. Chiara; M. Montero; D. G. Sarantites; O. L. Pechenaya; M. P. Carpenter; R. V.F. Janssens; T. L. Khoo; T. Lauritsen; C. J. Lister; D. Seweryniak; S. Zhu; S. G. Frauendorf

doi:10.1103/PhysRevC.74.044305

Multiple octupole-type band structures in Th220: Reflection-asymmetric tidal waves?

W. Reviol, C. J. Chiara, M. Montero, D. G. Sarantites, O. L. Pechenaya, M. P. Carpenter, R. V.F. Janssens, T. L. Khoo, T. Lauritsen, C. J. Lister, D. Seweryniak, S. Zhu, S. G. Frauendorf

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Abstract

The Th220 level scheme has been considerably extended from an experiment using the Mg26+Pt198 reaction at 128 MeV. The evaporation residues from this very fissile system were selected with the HERCULES detector system and residue-gated γ rays were measured with Gammasphere. The simplex feature (alternating-parity levels) persists up to the highest spins observed (23), but the nucleus exhibits a more vibrational-like behavior than the heavier Th isotopes. In addition, a doubling of the negative-parity, odd-spin states is seen as well as a staggering of the B(E1)/B(E2) ratios. A new interpretation based on a picture of tidal waves on a reflection-asymmetric nuclear surface is proposed.

Original language	English
Article number	044305
Journal	Physical Review C - Nuclear Physics
Volume	74
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.74.044305
State	Published - 2006

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Reviol, W., Chiara, C. J., Montero, M., Sarantites, D. G., Pechenaya, O. L., Carpenter, M. P., Janssens, R. V. F., Khoo, T. L., Lauritsen, T., Lister, C. J., Seweryniak, D., Zhu, S., & Frauendorf, S. G. (2006). Multiple octupole-type band structures in Th220: Reflection-asymmetric tidal waves? Physical Review C - Nuclear Physics, 74(4), Article 044305. https://doi.org/10.1103/PhysRevC.74.044305

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title = "Multiple octupole-type band structures in Th220: Reflection-asymmetric tidal waves?",

abstract = "The Th220 level scheme has been considerably extended from an experiment using the Mg26+Pt198 reaction at 128 MeV. The evaporation residues from this very fissile system were selected with the HERCULES detector system and residue-gated γ rays were measured with Gammasphere. The simplex feature (alternating-parity levels) persists up to the highest spins observed (23), but the nucleus exhibits a more vibrational-like behavior than the heavier Th isotopes. In addition, a doubling of the negative-parity, odd-spin states is seen as well as a staggering of the B(E1)/B(E2) ratios. A new interpretation based on a picture of tidal waves on a reflection-asymmetric nuclear surface is proposed.",

author = "W. Reviol and Chiara, {C. J.} and M. Montero and Sarantites, {D. G.} and Pechenaya, {O. L.} and Carpenter, {M. P.} and Janssens, {R. V.F.} and Khoo, {T. L.} and T. Lauritsen and Lister, {C. J.} and D. Seweryniak and S. Zhu and Frauendorf, {S. G.}",

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doi = "10.1103/PhysRevC.74.044305",

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T2 - Reflection-asymmetric tidal waves?

AU - Reviol, W.

AU - Chiara, C. J.

AU - Montero, M.

AU - Sarantites, D. G.

AU - Pechenaya, O. L.

AU - Carpenter, M. P.

AU - Janssens, R. V.F.

AU - Khoo, T. L.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - Seweryniak, D.

AU - Zhu, S.

AU - Frauendorf, S. G.

PY - 2006

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AB - The Th220 level scheme has been considerably extended from an experiment using the Mg26+Pt198 reaction at 128 MeV. The evaporation residues from this very fissile system were selected with the HERCULES detector system and residue-gated γ rays were measured with Gammasphere. The simplex feature (alternating-parity levels) persists up to the highest spins observed (23), but the nucleus exhibits a more vibrational-like behavior than the heavier Th isotopes. In addition, a doubling of the negative-parity, odd-spin states is seen as well as a staggering of the B(E1)/B(E2) ratios. A new interpretation based on a picture of tidal waves on a reflection-asymmetric nuclear surface is proposed.

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Multiple octupole-type band structures in Th220: Reflection-asymmetric tidal waves?

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