New results on super deformed bands in Hg and Tl nuclei

M. P. Carpenter, R. V F Janssens, Yun Liang, I. G. Bearden, I. Ahmad, M. W. Drigert, U. Garg, R. G. Henry, J. M. Lewis, T. L. Khoo, T. Lauritsen, S. Pilotte, W. Reviol, L. L. Riedinger, F. Soramel, C. H. Yu

Research output: Contribution to journalArticle

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Abstract

New results have been obtained on superdeformed states in 190Hg, 191T1 and 192T1. For 190Hg, the previously identified superdeformed band has been extended up to a rotational frequency of h {combining short solidus overlay}ω ≥ 0.40 MeV by combining data from several different experiments. The extracted dynamical moment of inertia T(2) vs h{stroke}ω exhibits a distinct change in slope at h {combining short solidus overlay}ω = 0.32 MeV. For 191T1 and 192T1, two and six superdeformed bands have been identified in these nuclei, respectively. Six of these eight bands exhibit a smooth rise in T(2) with h{stroke}ω characteristic of the other superdeformed bands identified in this mass region while the remaining two bands which are in 192T1 show a constant T(2)with h{stroke}ω. This new result can be understood in terms of Pauli blocking of quasiparticle alignments in high-N intruder orbitale. The new result for 190Hg is interpreted as evidence of a band interaction at the highest frequencies due to the rotational alignment of a pair of quasiparticles into these same intruder orbitals. These two new features taken together represent the first conclusive evidence that the alignment of intruders is responsible for the smooth rise in T(2) seen in the other superdeformed bands of this mass region.

Original languageEnglish (US)
Pages (from-to)57-66
Number of pages10
JournalNuclear Physics, Section A
Volume557
Issue numberC
DOIs
StatePublished - May 31 1993
Externally publishedYes

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nuclei
strokes
solidus
alignment
moments of inertia
slopes
orbitals
interactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Carpenter, M. P., Janssens, R. V. F., Liang, Y., Bearden, I. G., Ahmad, I., Drigert, M. W., ... Yu, C. H. (1993). New results on super deformed bands in Hg and Tl nuclei. Nuclear Physics, Section A, 557(C), 57-66. https://doi.org/10.1016/0375-9474(93)90530-B

New results on super deformed bands in Hg and Tl nuclei. / Carpenter, M. P.; Janssens, R. V F; Liang, Yun; Bearden, I. G.; Ahmad, I.; Drigert, M. W.; Garg, U.; Henry, R. G.; Lewis, J. M.; Khoo, T. L.; Lauritsen, T.; Pilotte, S.; Reviol, W.; Riedinger, L. L.; Soramel, F.; Yu, C. H.

In: Nuclear Physics, Section A, Vol. 557, No. C, 31.05.1993, p. 57-66.

Research output: Contribution to journalArticle

Carpenter, MP, Janssens, RVF, Liang, Y, Bearden, IG, Ahmad, I, Drigert, MW, Garg, U, Henry, RG, Lewis, JM, Khoo, TL, Lauritsen, T, Pilotte, S, Reviol, W, Riedinger, LL, Soramel, F & Yu, CH 1993, 'New results on super deformed bands in Hg and Tl nuclei', Nuclear Physics, Section A, vol. 557, no. C, pp. 57-66. https://doi.org/10.1016/0375-9474(93)90530-B
Carpenter MP, Janssens RVF, Liang Y, Bearden IG, Ahmad I, Drigert MW et al. New results on super deformed bands in Hg and Tl nuclei. Nuclear Physics, Section A. 1993 May 31;557(C):57-66. https://doi.org/10.1016/0375-9474(93)90530-B
Carpenter, M. P. ; Janssens, R. V F ; Liang, Yun ; Bearden, I. G. ; Ahmad, I. ; Drigert, M. W. ; Garg, U. ; Henry, R. G. ; Lewis, J. M. ; Khoo, T. L. ; Lauritsen, T. ; Pilotte, S. ; Reviol, W. ; Riedinger, L. L. ; Soramel, F. ; Yu, C. H. / New results on super deformed bands in Hg and Tl nuclei. In: Nuclear Physics, Section A. 1993 ; Vol. 557, No. C. pp. 57-66.
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T1 - New results on super deformed bands in Hg and Tl nuclei

AU - Carpenter, M. P.

AU - Janssens, R. V F

AU - Liang, Yun

AU - Bearden, I. G.

AU - Ahmad, I.

AU - Drigert, M. W.

AU - Garg, U.

AU - Henry, R. G.

AU - Lewis, J. M.

AU - Khoo, T. L.

AU - Lauritsen, T.

AU - Pilotte, S.

AU - Reviol, W.

AU - Riedinger, L. L.

AU - Soramel, F.

AU - Yu, C. H.

PY - 1993/5/31

Y1 - 1993/5/31

N2 - New results have been obtained on superdeformed states in 190Hg, 191T1 and 192T1. For 190Hg, the previously identified superdeformed band has been extended up to a rotational frequency of h {combining short solidus overlay}ω ≥ 0.40 MeV by combining data from several different experiments. The extracted dynamical moment of inertia T(2) vs h{stroke}ω exhibits a distinct change in slope at h {combining short solidus overlay}ω = 0.32 MeV. For 191T1 and 192T1, two and six superdeformed bands have been identified in these nuclei, respectively. Six of these eight bands exhibit a smooth rise in T(2) with h{stroke}ω characteristic of the other superdeformed bands identified in this mass region while the remaining two bands which are in 192T1 show a constant T(2)with h{stroke}ω. This new result can be understood in terms of Pauli blocking of quasiparticle alignments in high-N intruder orbitale. The new result for 190Hg is interpreted as evidence of a band interaction at the highest frequencies due to the rotational alignment of a pair of quasiparticles into these same intruder orbitals. These two new features taken together represent the first conclusive evidence that the alignment of intruders is responsible for the smooth rise in T(2) seen in the other superdeformed bands of this mass region.

AB - New results have been obtained on superdeformed states in 190Hg, 191T1 and 192T1. For 190Hg, the previously identified superdeformed band has been extended up to a rotational frequency of h {combining short solidus overlay}ω ≥ 0.40 MeV by combining data from several different experiments. The extracted dynamical moment of inertia T(2) vs h{stroke}ω exhibits a distinct change in slope at h {combining short solidus overlay}ω = 0.32 MeV. For 191T1 and 192T1, two and six superdeformed bands have been identified in these nuclei, respectively. Six of these eight bands exhibit a smooth rise in T(2) with h{stroke}ω characteristic of the other superdeformed bands identified in this mass region while the remaining two bands which are in 192T1 show a constant T(2)with h{stroke}ω. This new result can be understood in terms of Pauli blocking of quasiparticle alignments in high-N intruder orbitale. The new result for 190Hg is interpreted as evidence of a band interaction at the highest frequencies due to the rotational alignment of a pair of quasiparticles into these same intruder orbitals. These two new features taken together represent the first conclusive evidence that the alignment of intruders is responsible for the smooth rise in T(2) seen in the other superdeformed bands of this mass region.

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