Testing mean-field models near the [Formula Presented] line: [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]

N. S. Kelsall; S. M. Fischer; D. P. Balamuth; G. C. Ball; M. P. Carpenter; R. M. Clark; J. Durell; P. Fallon; S. J. Freeman; P. A. Hausladen; R. V.F. Janssens; D. G. Jenkins; M. J. Leddy; C. J. Lister; A. O. Macchiavelli; D. G. Sarantites; D. C. Schmidt; D. Seweryniak; C. E. Svensson; B. J. Varley; S. Vincent; R. Wadsworth; A. N. Wilson; A. V. Afanasjev; S. Frauendorf; I. Ragnarsson; R. Wyss

doi:10.1103/PhysRevC.65.044331

Testing mean-field models near the [Formula Presented] line: [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]

N. S. Kelsall
, S. M. Fischer
, D. P. Balamuth
, G. C. Ball
, M. P. Carpenter
, R. M. Clark
, J. Durell
, P. Fallon
, S. J. Freeman
, P. A. Hausladen
, R. V.F. Janssens
, D. G. Jenkins
, M. J. Leddy
, C. J. Lister
, A. O. Macchiavelli
, D. G. Sarantites
, D. C. Schmidt
, D. Seweryniak
, C. E. Svensson
, B. J. Varley

S. Vincent, R. Wadsworth, A. N. Wilson, A. V. Afanasjev, S. Frauendorf, I. Ragnarsson, R. Wyss

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

Abstract

Excited states in the [Formula Presented] nucleus [Formula Presented] have been investigated using the [Formula Presented] and [Formula Presented] reactions at 145 and 160 MeV, respectively. [Formula Presented] rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring [Formula Presented] indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of [Formula Presented] pairing correlations. At high spin all the models can reproduce the experimental data.

Original language	English
Pages (from-to)	13
Number of pages	1
Journal	Physical Review C - Nuclear Physics
Volume	65
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.65.044331
State	Published - 2002
Externally published	Yes

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Kelsall, N. S., Fischer, S. M., Balamuth, D. P., Ball, G. C., Carpenter, M. P., Clark, R. M., Durell, J., Fallon, P., Freeman, S. J., Hausladen, P. A., Janssens, R. V. F., Jenkins, D. G., Leddy, M. J., Lister, C. J., Macchiavelli, A. O., Sarantites, D. G., Schmidt, D. C., Seweryniak, D., Svensson, C. E., ... Wyss, R. (2002). Testing mean-field models near the [Formula Presented] line: [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]. Physical Review C - Nuclear Physics, 65(4), 13. https://doi.org/10.1103/PhysRevC.65.044331

@article{d559ece76ff3489ab6c14638ab8781ea,

title = "Testing mean-field models near the [Formula Presented] line: [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]",

abstract = "Excited states in the [Formula Presented] nucleus [Formula Presented] have been investigated using the [Formula Presented] and [Formula Presented] reactions at 145 and 160 MeV, respectively. [Formula Presented] rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring [Formula Presented] indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of [Formula Presented] pairing correlations. At high spin all the models can reproduce the experimental data.",

author = "Kelsall, \{N. S.\} and Fischer, \{S. M.\} and Balamuth, \{D. P.\} and Ball, \{G. C.\} and Carpenter, \{M. P.\} and Clark, \{R. M.\} and J. Durell and P. Fallon and Freeman, \{S. J.\} and Hausladen, \{P. A.\} and Janssens, \{R. V.F.\} and Jenkins, \{D. G.\} and Leddy, \{M. J.\} and Lister, \{C. J.\} and Macchiavelli, \{A. O.\} and Sarantites, \{D. G.\} and Schmidt, \{D. C.\} and D. Seweryniak and Svensson, \{C. E.\} and Varley, \{B. J.\} and S. Vincent and R. Wadsworth and Wilson, \{A. N.\} and Afanasjev, \{A. V.\} and S. Frauendorf and I. Ragnarsson and R. Wyss",

year = "2002",

doi = "10.1103/PhysRevC.65.044331",

language = "English",

volume = "65",

pages = "13",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

number = "4",

}

Kelsall, NS, Fischer, SM, Balamuth, DP, Ball, GC, Carpenter, MP, Clark, RM, Durell, J, Fallon, P, Freeman, SJ, Hausladen, PA, Janssens, RVF, Jenkins, DG, Leddy, MJ, Lister, CJ, Macchiavelli, AO, Sarantites, DG, Schmidt, DC, Seweryniak, D, Svensson, CE, Varley, BJ, Vincent, S, Wadsworth, R, Wilson, AN, Afanasjev, AV, Frauendorf, S, Ragnarsson, I & Wyss, R 2002, 'Testing mean-field models near the [Formula Presented] line: [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]', Physical Review C - Nuclear Physics, vol. 65, no. 4, pp. 13. https://doi.org/10.1103/PhysRevC.65.044331

TY - JOUR

T1 - Testing mean-field models near the [Formula Presented] line

T2 - [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]

AU - Kelsall, N. S.

AU - Fischer, S. M.

AU - Balamuth, D. P.

AU - Ball, G. C.

AU - Carpenter, M. P.

AU - Clark, R. M.

AU - Durell, J.

AU - Fallon, P.

AU - Freeman, S. J.

AU - Hausladen, P. A.

AU - Janssens, R. V.F.

AU - Jenkins, D. G.

AU - Leddy, M. J.

AU - Lister, C. J.

AU - Macchiavelli, A. O.

AU - Sarantites, D. G.

AU - Schmidt, D. C.

AU - Seweryniak, D.

AU - Svensson, C. E.

AU - Varley, B. J.

AU - Vincent, S.

AU - Wadsworth, R.

AU - Wilson, A. N.

AU - Afanasjev, A. V.

AU - Frauendorf, S.

AU - Ragnarsson, I.

AU - Wyss, R.

PY - 2002

Y1 - 2002

N2 - Excited states in the [Formula Presented] nucleus [Formula Presented] have been investigated using the [Formula Presented] and [Formula Presented] reactions at 145 and 160 MeV, respectively. [Formula Presented] rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring [Formula Presented] indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of [Formula Presented] pairing correlations. At high spin all the models can reproduce the experimental data.

AB - Excited states in the [Formula Presented] nucleus [Formula Presented] have been investigated using the [Formula Presented] and [Formula Presented] reactions at 145 and 160 MeV, respectively. [Formula Presented] rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring [Formula Presented] indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of [Formula Presented] pairing correlations. At high spin all the models can reproduce the experimental data.

UR - https://www.scopus.com/pages/publications/85035287045

U2 - 10.1103/PhysRevC.65.044331

DO - 10.1103/PhysRevC.65.044331

M3 - Article

AN - SCOPUS:85035287045

SN - 0556-2813

VL - 65

SP - 13

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

ER -

Testing mean-field models near the [Formula Presented] line: [Formula Presented]-ray spectroscopy of the [Formula Presented] nucleus [Formula Presented]

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