Multiple shape-driving v(h(11/2))2 and π(h(11/2))2 alignments in 120Ba

J. F. Smith; C. J. Chiara; D. B. Fossan; G. J. Lane; J. M. Sears; I. Thorslund; I. M. Hibbert; R. Wadsworth; I. Y. Lee; A. O. Macchiavelli

doi:10.1016/S0370-2693(00)00557-8

Multiple shape-driving v(h(11/2))² and π(h(11/2))² alignments in ¹²⁰Ba

J. F. Smith^*, C. J. Chiara, D. B. Fossan, G. J. Lane, J. M. Sears, I. Thorslund, I. M. Hibbert, R. Wadsworth, I. Y. Lee, A. O. Macchiavelli

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

High-spin states have been observed in ¹²⁰Ba up to spin 42 h. The ground-state band is observed to fork into two aligned two-quasiparticle bands, which are identified with the π(h(11/2))² and v(h(11/2))² quasiparticles. At higher spin in each of the two aligned bands, the other pair of h(11/2) nucleons aligns in each band are observed to align, resulting in the single four-quasiparticle v(h(11/2))² small x π(h(11/2))² band. This unique and novel phenomenon has allowed interaction strengths and alignment frequencies to be studied and compared. Differences in alignment frequencies, for the same pairs of nucleons are attributed to shape polarization by the aligned or aligning quasiparticles. The interaction strengths have been investigated using a four-band mixing model. The results are discussed with respect to cranked Woods-Saxon calculations, and to alignments in neighboring nuclei. (C) 2000 Elsevier Science B.V.

Original language	English
Pages (from-to)	7-14
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	483
Issue number	1-3
DOIs	https://doi.org/10.1016/S0370-2693(00)00557-8
Publication status	Published - 15 Jun 2000

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Smith, J. F., Chiara, C. J., Fossan, D. B., Lane, G. J., Sears, J. M., Thorslund, I., Hibbert, I. M., Wadsworth, R., Lee, I. Y., & Macchiavelli, A. O. (2000). Multiple shape-driving v(h(11/2))² and π(h(11/2))² alignments in ¹²⁰Ba. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 483(1-3), 7-14. https://doi.org/10.1016/S0370-2693(00)00557-8

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title = "Multiple shape-driving v(h(11/2))2 and π(h(11/2))2 alignments in 120Ba",

abstract = "High-spin states have been observed in 120Ba up to spin 42 h. The ground-state band is observed to fork into two aligned two-quasiparticle bands, which are identified with the π(h(11/2))2 and v(h(11/2))2 quasiparticles. At higher spin in each of the two aligned bands, the other pair of h(11/2) nucleons aligns in each band are observed to align, resulting in the single four-quasiparticle v(h(11/2))2 small x π(h(11/2))2 band. This unique and novel phenomenon has allowed interaction strengths and alignment frequencies to be studied and compared. Differences in alignment frequencies, for the same pairs of nucleons are attributed to shape polarization by the aligned or aligning quasiparticles. The interaction strengths have been investigated using a four-band mixing model. The results are discussed with respect to cranked Woods-Saxon calculations, and to alignments in neighboring nuclei. (C) 2000 Elsevier Science B.V.",

author = "Smith, {J. F.} and Chiara, {C. J.} and Fossan, {D. B.} and Lane, {G. J.} and Sears, {J. M.} and I. Thorslund and Hibbert, {I. M.} and R. Wadsworth and Lee, {I. Y.} and Macchiavelli, {A. O.}",

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doi = "10.1016/S0370-2693(00)00557-8",

language = "English",

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T1 - Multiple shape-driving v(h(11/2))2 and π(h(11/2))2 alignments in 120Ba

AU - Smith, J. F.

AU - Chiara, C. J.

AU - Fossan, D. B.

AU - Lane, G. J.

AU - Sears, J. M.

AU - Thorslund, I.

AU - Hibbert, I. M.

AU - Wadsworth, R.

AU - Lee, I. Y.

AU - Macchiavelli, A. O.

PY - 2000/6/15

Y1 - 2000/6/15

N2 - High-spin states have been observed in 120Ba up to spin 42 h. The ground-state band is observed to fork into two aligned two-quasiparticle bands, which are identified with the π(h(11/2))2 and v(h(11/2))2 quasiparticles. At higher spin in each of the two aligned bands, the other pair of h(11/2) nucleons aligns in each band are observed to align, resulting in the single four-quasiparticle v(h(11/2))2 small x π(h(11/2))2 band. This unique and novel phenomenon has allowed interaction strengths and alignment frequencies to be studied and compared. Differences in alignment frequencies, for the same pairs of nucleons are attributed to shape polarization by the aligned or aligning quasiparticles. The interaction strengths have been investigated using a four-band mixing model. The results are discussed with respect to cranked Woods-Saxon calculations, and to alignments in neighboring nuclei. (C) 2000 Elsevier Science B.V.

AB - High-spin states have been observed in 120Ba up to spin 42 h. The ground-state band is observed to fork into two aligned two-quasiparticle bands, which are identified with the π(h(11/2))2 and v(h(11/2))2 quasiparticles. At higher spin in each of the two aligned bands, the other pair of h(11/2) nucleons aligns in each band are observed to align, resulting in the single four-quasiparticle v(h(11/2))2 small x π(h(11/2))2 band. This unique and novel phenomenon has allowed interaction strengths and alignment frequencies to be studied and compared. Differences in alignment frequencies, for the same pairs of nucleons are attributed to shape polarization by the aligned or aligning quasiparticles. The interaction strengths have been investigated using a four-band mixing model. The results are discussed with respect to cranked Woods-Saxon calculations, and to alignments in neighboring nuclei. (C) 2000 Elsevier Science B.V.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-3

ER -

Multiple shape-driving v(h(11/2))2 and π(h(11/2))2 alignments in 120Ba

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Multiple shape-driving v(h(11/2))² and π(h(11/2))² alignments in ¹²⁰Ba