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. VarleyS. 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

Access to Document

10.1103/PhysRevC.65.044331

Cite this

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]

Abstract

Access to Document

Other files and links

Fingerprint

Cite this