Evidence for octupole softness of the superdeformed shape from band interactions in 193,4Hg

D. M. Cullen; M. A. Riley; A. Alderson; I. Ali; T. Bengtsson; M. A. Bentley; A. M. Bruce; P. Fallon; P. D. Forsyth; F. Hanna; S. M. Mullins; W. Nazarewicz; R. Poynter; P. Regan; J. W. Roberts; W. Satula; J. F. Sharpey-Schafer; J. Simpson; G. Sletten; P. J. Twin; R. Wadsworth; R. Wyss

doi:10.1016/0375-9474(90)91137-G

Evidence for octupole softness of the superdeformed shape from band interactions in ^193,4Hg

D. M. Cullen^*, M. A. Riley, A. Alderson, I. Ali, T. Bengtsson, M. A. Bentley, A. M. Bruce, P. Fallon, P. D. Forsyth, F. Hanna, S. M. Mullins, W. Nazarewicz, R. Poynter, P. Regan, J. W. Roberts, W. Satula, J. F. Sharpey-Schafer, J. Simpson, G. Sletten, P. J. TwinR. Wadsworth, R. Wyss

^*Corresponding author for this work

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

Abstract

Three superdeformed (SD) bands have been observed in ¹⁹⁴Hg and four (or five?) SD bands in ¹⁹³Hg using the ¹⁵⁰Nd + ⁴⁸Ca reaction. All bands except for two in ¹⁹³Hg show a steady increase in dynamical moment of inertia J⁽²⁾ with rotational frequency. The two exceptional bands form a classical pair of strongly interacting bands. It is suggested that the strong interaction between the bands is caused by a softness to octupole deformation. Evidence is found for the existence of dipole transitions connecting bands of opposite signature in ¹⁹³Hg. The strengths of these transitions suggest that they are probably E1 supporting the importance of the role of octupole vibrations. These data suggest the wider importance of octupole softness in enhancing E1 transitions in the SD feeding and decay mechanisms. The spectroscopy of the observed SD bands in ^193,4Hg are discussed in detail and attention is drawn to the "identical" energies of γ-rays in these isotopes with those in lighter isotopes. The similarities in bands relate to the neutron sub-shell closure for SD nuclei at N=112.

Original language	English
Pages (from-to)	c105-c113
Journal	Nuclear Physics, Section A
Volume	520
Issue number	C
DOIs	https://doi.org/10.1016/0375-9474(90)91137-G
Publication status	Published - Dec 1990

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Cullen, D. M., Riley, M. A., Alderson, A., Ali, I., Bengtsson, T., Bentley, M. A., Bruce, A. M., Fallon, P., Forsyth, P. D., Hanna, F., Mullins, S. M., Nazarewicz, W., Poynter, R., Regan, P., Roberts, J. W., Satula, W., Sharpey-Schafer, J. F., Simpson, J., Sletten, G., ... Wyss, R. (1990). Evidence for octupole softness of the superdeformed shape from band interactions in ^193,4Hg. Nuclear Physics, Section A, 520(C), c105-c113. https://doi.org/10.1016/0375-9474(90)91137-G

@article{f68808f59acd463a9000fc8e795e23f7,

title = "Evidence for octupole softness of the superdeformed shape from band interactions in 193,4Hg",

abstract = "Three superdeformed (SD) bands have been observed in 194Hg and four (or five?) SD bands in 193Hg using the 150Nd + 48Ca reaction. All bands except for two in 193Hg show a steady increase in dynamical moment of inertia J(2) with rotational frequency. The two exceptional bands form a classical pair of strongly interacting bands. It is suggested that the strong interaction between the bands is caused by a softness to octupole deformation. Evidence is found for the existence of dipole transitions connecting bands of opposite signature in 193Hg. The strengths of these transitions suggest that they are probably E1 supporting the importance of the role of octupole vibrations. These data suggest the wider importance of octupole softness in enhancing E1 transitions in the SD feeding and decay mechanisms. The spectroscopy of the observed SD bands in 193,4Hg are discussed in detail and attention is drawn to the {"}identical{"} energies of γ-rays in these isotopes with those in lighter isotopes. The similarities in bands relate to the neutron sub-shell closure for SD nuclei at N=112.",

author = "Cullen, {D. M.} and Riley, {M. A.} and A. Alderson and I. Ali and T. Bengtsson and Bentley, {M. A.} and Bruce, {A. M.} and P. Fallon and Forsyth, {P. D.} and F. Hanna and Mullins, {S. M.} and W. Nazarewicz and R. Poynter and P. Regan and Roberts, {J. W.} and W. Satula and Sharpey-Schafer, {J. F.} and J. Simpson and G. Sletten and Twin, {P. J.} and R. Wadsworth and R. Wyss",

year = "1990",

month = dec,

doi = "10.1016/0375-9474(90)91137-G",

language = "English",

volume = "520",

pages = "c105--c113",

journal = "Nuclear Physics, Section A",

issn = "0375-9474",

publisher = "Elsevier",

number = "C",

}

Cullen, DM, Riley, MA, Alderson, A, Ali, I, Bengtsson, T, Bentley, MA, Bruce, AM, Fallon, P, Forsyth, PD, Hanna, F, Mullins, SM, Nazarewicz, W, Poynter, R, Regan, P, Roberts, JW, Satula, W, Sharpey-Schafer, JF, Simpson, J, Sletten, G, Twin, PJ, Wadsworth, R & Wyss, R 1990, 'Evidence for octupole softness of the superdeformed shape from band interactions in ^193,4Hg', Nuclear Physics, Section A, vol. 520, no. C, pp. c105-c113. https://doi.org/10.1016/0375-9474(90)91137-G

TY - JOUR

T1 - Evidence for octupole softness of the superdeformed shape from band interactions in 193,4Hg

AU - Cullen, D. M.

AU - Riley, M. A.

AU - Alderson, A.

AU - Ali, I.

AU - Bengtsson, T.

AU - Bentley, M. A.

AU - Bruce, A. M.

AU - Fallon, P.

AU - Forsyth, P. D.

AU - Hanna, F.

AU - Mullins, S. M.

AU - Nazarewicz, W.

AU - Poynter, R.

AU - Regan, P.

AU - Roberts, J. W.

AU - Satula, W.

AU - Sharpey-Schafer, J. F.

AU - Simpson, J.

AU - Sletten, G.

AU - Twin, P. J.

AU - Wadsworth, R.

AU - Wyss, R.

PY - 1990/12

Y1 - 1990/12

N2 - Three superdeformed (SD) bands have been observed in 194Hg and four (or five?) SD bands in 193Hg using the 150Nd + 48Ca reaction. All bands except for two in 193Hg show a steady increase in dynamical moment of inertia J(2) with rotational frequency. The two exceptional bands form a classical pair of strongly interacting bands. It is suggested that the strong interaction between the bands is caused by a softness to octupole deformation. Evidence is found for the existence of dipole transitions connecting bands of opposite signature in 193Hg. The strengths of these transitions suggest that they are probably E1 supporting the importance of the role of octupole vibrations. These data suggest the wider importance of octupole softness in enhancing E1 transitions in the SD feeding and decay mechanisms. The spectroscopy of the observed SD bands in 193,4Hg are discussed in detail and attention is drawn to the "identical" energies of γ-rays in these isotopes with those in lighter isotopes. The similarities in bands relate to the neutron sub-shell closure for SD nuclei at N=112.

AB - Three superdeformed (SD) bands have been observed in 194Hg and four (or five?) SD bands in 193Hg using the 150Nd + 48Ca reaction. All bands except for two in 193Hg show a steady increase in dynamical moment of inertia J(2) with rotational frequency. The two exceptional bands form a classical pair of strongly interacting bands. It is suggested that the strong interaction between the bands is caused by a softness to octupole deformation. Evidence is found for the existence of dipole transitions connecting bands of opposite signature in 193Hg. The strengths of these transitions suggest that they are probably E1 supporting the importance of the role of octupole vibrations. These data suggest the wider importance of octupole softness in enhancing E1 transitions in the SD feeding and decay mechanisms. The spectroscopy of the observed SD bands in 193,4Hg are discussed in detail and attention is drawn to the "identical" energies of γ-rays in these isotopes with those in lighter isotopes. The similarities in bands relate to the neutron sub-shell closure for SD nuclei at N=112.

UR - http://www.scopus.com/inward/record.url?scp=1542753325&partnerID=8YFLogxK

U2 - 10.1016/0375-9474(90)91137-G

DO - 10.1016/0375-9474(90)91137-G

M3 - Article

AN - SCOPUS:1542753325

SN - 0375-9474

VL - 520

SP - c105-c113

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - C

ER -

Evidence for octupole softness of the superdeformed shape from band interactions in 193,4Hg

Abstract

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Evidence for octupole softness of the superdeformed shape from band interactions in ^193,4Hg