Evidence for octupole vibration in superdeformed 196Pb

D. Roßbach; A. Görgen; H. Hübel; E. Mergel; G. Schönwaßer; A. N. Wilson; F. Azaiez; A. Astier; D. Bazzacco; M. Bergström; C. Bourgeois; N. Buforn; F. Hannachi; K. Hauschild; A. Korichi; W. Korten; T. Kröll; A. Lopez-Martens; R. Lucas; H. J. Maier; N. Redon; P. Reiter; C. Rossi-Alvarez; O. Stezowski; P. Thirolf

doi:10.1016/S0370-2693(01)00749-3

Evidence for octupole vibration in superdeformed ¹⁹⁶Pb

D. Roßbach^*, A. Görgen, H. Hübel, E. Mergel, G. Schönwaßer, A. N. Wilson, F. Azaiez, A. Astier, D. Bazzacco, M. Bergström, C. Bourgeois, N. Buforn, F. Hannachi, K. Hauschild, A. Korichi, W. Korten, T. Kröll, A. Lopez-Martens, R. Lucas, H. J. MaierN. Redon, P. Reiter, C. Rossi-Alvarez, O. Stezowski, P. Thirolf

^*Corresponding author for this work

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

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Abstract

Evidence for a low-lying octupole vibrational excitation in the superdeformed energy minimum of ¹⁹⁶Pb is presented. High-spin states in this nucleus have been populated in the ¹⁷⁰Er(³⁰Si, 4n)¹⁹⁶pb reaction. The in-beam γ-ray decay has been investigated using the EUROBALL IV Ge-detector array. The linear polarization of γ-ray transitions connecting an excited superdeformed band with the yrast superdeformed band has been measured from which E1 multipolarity is determined. These E1 transitions, which compete with the highly collective in-band E2 transitions, are strongly enhanced. This is an important step towards establishing that low-lying octupole vibrations are a wide spread phenomenon in the A = 190 region of superdeformation.

Original language	English
Pages (from-to)	9-14
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	513
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(01)00749-3
Publication status	Published - 26 Jul 2001
Externally published	Yes

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Roßbach, D., Görgen, A., Hübel, H., Mergel, E., Schönwaßer, G., Wilson, A. N., Azaiez, F., Astier, A., Bazzacco, D., Bergström, M., Bourgeois, C., Buforn, N., Hannachi, F., Hauschild, K., Korichi, A., Korten, W., Kröll, T., Lopez-Martens, A., Lucas, R., ... Thirolf, P. (2001). Evidence for octupole vibration in superdeformed ¹⁹⁶Pb. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 513(1-2), 9-14. https://doi.org/10.1016/S0370-2693(01)00749-3

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title = "Evidence for octupole vibration in superdeformed 196Pb",

abstract = "Evidence for a low-lying octupole vibrational excitation in the superdeformed energy minimum of 196Pb is presented. High-spin states in this nucleus have been populated in the 170Er(30Si, 4n)196pb reaction. The in-beam γ-ray decay has been investigated using the EUROBALL IV Ge-detector array. The linear polarization of γ-ray transitions connecting an excited superdeformed band with the yrast superdeformed band has been measured from which E1 multipolarity is determined. These E1 transitions, which compete with the highly collective in-band E2 transitions, are strongly enhanced. This is an important step towards establishing that low-lying octupole vibrations are a wide spread phenomenon in the A = 190 region of superdeformation.",

keywords = "Enhanced E1 inter-band transitions, Linear polarization, Octupole vibration, Superdeformation",

author = "D. Ro{\ss}bach and A. G{\"o}rgen and H. H{\"u}bel and E. Mergel and G. Sch{\"o}nwa{\ss}er and Wilson, {A. N.} and F. Azaiez and A. Astier and D. Bazzacco and M. Bergstr{\"o}m and C. Bourgeois and N. Buforn and F. Hannachi and K. Hauschild and A. Korichi and W. Korten and T. Kr{\"o}ll and A. Lopez-Martens and R. Lucas and Maier, {H. J.} and N. Redon and P. Reiter and C. Rossi-Alvarez and O. Stezowski and P. Thirolf",

year = "2001",

month = jul,

day = "26",

doi = "10.1016/S0370-2693(01)00749-3",

language = "English",

volume = "513",

pages = "9--14",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

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number = "1-2",

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Roßbach, D, Görgen, A, Hübel, H, Mergel, E, Schönwaßer, G, Wilson, AN, Azaiez, F, Astier, A, Bazzacco, D, Bergström, M, Bourgeois, C, Buforn, N, Hannachi, F, Hauschild, K, Korichi, A, Korten, W, Kröll, T, Lopez-Martens, A, Lucas, R, Maier, HJ, Redon, N, Reiter, P, Rossi-Alvarez, C, Stezowski, O & Thirolf, P 2001, 'Evidence for octupole vibration in superdeformed ¹⁹⁶Pb', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 513, no. 1-2, pp. 9-14. https://doi.org/10.1016/S0370-2693(01)00749-3

TY - JOUR

T1 - Evidence for octupole vibration in superdeformed 196Pb

AU - Roßbach, D.

AU - Görgen, A.

AU - Hübel, H.

AU - Mergel, E.

AU - Schönwaßer, G.

AU - Wilson, A. N.

AU - Azaiez, F.

AU - Astier, A.

AU - Bazzacco, D.

AU - Bergström, M.

AU - Bourgeois, C.

AU - Buforn, N.

AU - Hannachi, F.

AU - Hauschild, K.

AU - Korichi, A.

AU - Korten, W.

AU - Kröll, T.

AU - Lopez-Martens, A.

AU - Lucas, R.

AU - Maier, H. J.

AU - Redon, N.

AU - Reiter, P.

AU - Rossi-Alvarez, C.

AU - Stezowski, O.

AU - Thirolf, P.

PY - 2001/7/26

Y1 - 2001/7/26

N2 - Evidence for a low-lying octupole vibrational excitation in the superdeformed energy minimum of 196Pb is presented. High-spin states in this nucleus have been populated in the 170Er(30Si, 4n)196pb reaction. The in-beam γ-ray decay has been investigated using the EUROBALL IV Ge-detector array. The linear polarization of γ-ray transitions connecting an excited superdeformed band with the yrast superdeformed band has been measured from which E1 multipolarity is determined. These E1 transitions, which compete with the highly collective in-band E2 transitions, are strongly enhanced. This is an important step towards establishing that low-lying octupole vibrations are a wide spread phenomenon in the A = 190 region of superdeformation.

AB - Evidence for a low-lying octupole vibrational excitation in the superdeformed energy minimum of 196Pb is presented. High-spin states in this nucleus have been populated in the 170Er(30Si, 4n)196pb reaction. The in-beam γ-ray decay has been investigated using the EUROBALL IV Ge-detector array. The linear polarization of γ-ray transitions connecting an excited superdeformed band with the yrast superdeformed band has been measured from which E1 multipolarity is determined. These E1 transitions, which compete with the highly collective in-band E2 transitions, are strongly enhanced. This is an important step towards establishing that low-lying octupole vibrations are a wide spread phenomenon in the A = 190 region of superdeformation.

KW - Enhanced E1 inter-band transitions

KW - Linear polarization

KW - Octupole vibration

KW - Superdeformation

UR - http://www.scopus.com/inward/record.url?scp=0035954636&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(01)00749-3

DO - 10.1016/S0370-2693(01)00749-3

M3 - Article

SN - 0370-2693

VL - 513

SP - 9

EP - 14

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 - 1-2

ER -

Evidence for octupole vibration in superdeformed ¹⁹⁶Pb

Abstract

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