Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive 222Ra  and 228Ra  beams

P.A.  Butler; L.P. Gaffney; P. Spagnoletti; K. Abrahams; Mike Bowry; J. Cederkäll; G. de Angelis; H. De Witte; P.E. Garrett; A. Goldkuhle; C. Henrich; A. Illana; K. Johnston; D.T. Joss; J.M. Keatings; N.A. Kelly; M. Komorowska; J. Konki; T. Kröll; M. Lozano; B.S. Nara Singh; D. O'Donnell; J. Ojala; R.D. Page; L.G. Pedersen; C. Raison; P. Reiter; J.A. Rodriguez; D. Rosiak; S. Rothe; M. Scheck; M. Seidlitz; T.M. Shneidman; B. Siebeck; J. Sinclair; J.F.  Smith; M. Stryjczyk; P. Van Duppen; S. Vinals; V. Virtanen; N. Warr; K. Wrzosek-Lipska; M. Zielińska

doi:10.1103/PhysRevLett.124.042503

Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive ²²²Ra and ²²⁸Ra beams

P.A. Butler, L.P. Gaffney, P. Spagnoletti, K. Abrahams, Mike Bowry, J. Cederkäll, G. de Angelis, H. De Witte, P.E. Garrett, A. Goldkuhle, C. Henrich, A. Illana, K. Johnston, D.T. Joss, J.M. Keatings, N.A. Kelly, M. Komorowska, J. Konki, T. Kröll, M. LozanoB.S. Nara Singh, D. O'Donnell, J. Ojala, R.D. Page, L.G. Pedersen, C. Raison, P. Reiter, J.A. Rodriguez, D. Rosiak, S. Rothe, M. Scheck, M. Seidlitz, T.M. Shneidman, B. Siebeck, J. Sinclair, J.F. Smith, M. Stryjczyk, P. Van Duppen, S. Vinals, V. Virtanen, N. Warr, K. Wrzosek-Lipska, M. Zielińska

School of Computing, Engineering and Physical Sciences

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Abstract

There is sparse direct experimental evidence that atomic nuclei can exhibit stable “pear” shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole (E3) matrix elements have been determined for transitions in ^222,228Ra nuclei using the method of sub-barrier, multistep Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of E3 matrix elements for different nuclear transitions is explained by describing ²²²Ra as pear shaped with stable octupole deformation, while²²⁸Ra behaves like an octupole vibrator.

Original language	English
Article number	042503
Number of pages	6
Journal	Physical Review Letters
Volume	124
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.124.042503
Publication status	Published - 31 Jan 2020

Keywords

nucl-ex
hep-ph
nucl-th
physics.atom-ph

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10.1103/PhysRevLett.124.042503Licence: CC BY

2020 01 31 Butler et al Octupole finalFinal published version, 343 KBLicence: CC BY

https://arxiv.org/abs/2001.09681

David O'Donnell
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Butler, P. A., Gaffney, L. P., Spagnoletti, P., Abrahams, K., Bowry, M., Cederkäll, J., de Angelis, G., De Witte, H., Garrett, P. E., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D. T., Keatings, J. M., Kelly, N. A., Komorowska, M., Konki, J., Kröll, T., ... Zielińska, M. (2020). Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive ²²²Ra and ²²⁸Ra beams. Physical Review Letters, 124(4), Article 042503. https://doi.org/10.1103/PhysRevLett.124.042503

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title = "Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive 222Ra and 228Ra beams",

abstract = "There is sparse direct experimental evidence that atomic nuclei can exhibit stable “pear” shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole (E3) matrix elements have been determined for transitions in 222,228Ra nuclei using the method of sub-barrier, multistep Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of E3 matrix elements for different nuclear transitions is explained by describing 222Ra as pear shaped with stable octupole deformation, while 228Ra behaves like an octupole vibrator.",

keywords = "nucl-ex, hep-ph, nucl-th, physics.atom-ph",

author = "P.A. Butler and L.P. Gaffney and P. Spagnoletti and K. Abrahams and Mike Bowry and J. Cederk{\"a}ll and {de Angelis}, G. and {De Witte}, H. and P.E. Garrett and A. Goldkuhle and C. Henrich and A. Illana and K. Johnston and D.T. Joss and J.M. Keatings and N.A. Kelly and M. Komorowska and J. Konki and T. Kr{\"o}ll and M. Lozano and {Nara Singh}, B.S. and D. O'Donnell and J. Ojala and R.D. Page and L.G. Pedersen and C. Raison and P. Reiter and J.A. Rodriguez and D. Rosiak and S. Rothe and M. Scheck and M. Seidlitz and T.M. Shneidman and B. Siebeck and J. Sinclair and J.F. Smith and M. Stryjczyk and {Van Duppen}, P. and S. Vinals and V. Virtanen and N. Warr and K. Wrzosek-Lipska and M. Zieli{\'n}ska",

note = "to be published in Physical Review Letters",

year = "2020",

month = jan,

day = "31",

doi = "10.1103/PhysRevLett.124.042503",

language = "English",

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Butler, PA, Gaffney, LP, Spagnoletti, P, Abrahams, K, Bowry, M, Cederkäll, J, de Angelis, G, De Witte, H, Garrett, PE, Goldkuhle, A, Henrich, C, Illana, A, Johnston, K, Joss, DT, Keatings, JM, Kelly, NA, Komorowska, M, Konki, J, Kröll, T, Lozano, M, Nara Singh, BS , O'Donnell, D, Ojala, J, Page, RD, Pedersen, LG, Raison, C, Reiter, P, Rodriguez, JA, Rosiak, D, Rothe, S, Scheck, M, Seidlitz, M, Shneidman, TM, Siebeck, B, Sinclair, J, Smith, JF, Stryjczyk, M, Van Duppen, P, Vinals, S, Virtanen, V, Warr, N, Wrzosek-Lipska, K & Zielińska, M 2020, 'Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive ²²²Ra and ²²⁸Ra beams', Physical Review Letters, vol. 124, no. 4, 042503. https://doi.org/10.1103/PhysRevLett.124.042503

TY - JOUR

T1 - Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive 222Ra and 228Ra beams

AU - Butler, P.A.

AU - Gaffney, L.P.

AU - Spagnoletti, P.

AU - Abrahams, K.

AU - Bowry, Mike

AU - Cederkäll, J.

AU - de Angelis, G.

AU - De Witte, H.

AU - Garrett, P.E.

AU - Goldkuhle, A.

AU - Henrich, C.

AU - Illana, A.

AU - Johnston, K.

AU - Joss, D.T.

AU - Keatings, J.M.

AU - Kelly, N.A.

AU - Komorowska, M.

AU - Konki, J.

AU - Kröll, T.

AU - Lozano, M.

AU - Nara Singh, B.S.

AU - O'Donnell, D.

AU - Ojala, J.

AU - Page, R.D.

AU - Pedersen, L.G.

AU - Raison, C.

AU - Reiter, P.

AU - Rodriguez, J.A.

AU - Rosiak, D.

AU - Rothe, S.

AU - Scheck, M.

AU - Seidlitz, M.

AU - Shneidman, T.M.

AU - Siebeck, B.

AU - Sinclair, J.

AU - Smith, J.F.

AU - Stryjczyk, M.

AU - Van Duppen, P.

AU - Vinals, S.

AU - Virtanen, V.

AU - Warr, N.

AU - Wrzosek-Lipska, K.

AU - Zielińska, M.

N1 - to be published in Physical Review Letters

PY - 2020/1/31

Y1 - 2020/1/31

N2 - There is sparse direct experimental evidence that atomic nuclei can exhibit stable “pear” shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole (E3) matrix elements have been determined for transitions in 222,228Ra nuclei using the method of sub-barrier, multistep Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of E3 matrix elements for different nuclear transitions is explained by describing 222Ra as pear shaped with stable octupole deformation, while 228Ra behaves like an octupole vibrator.

AB - There is sparse direct experimental evidence that atomic nuclei can exhibit stable “pear” shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole (E3) matrix elements have been determined for transitions in 222,228Ra nuclei using the method of sub-barrier, multistep Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of E3 matrix elements for different nuclear transitions is explained by describing 222Ra as pear shaped with stable octupole deformation, while 228Ra behaves like an octupole vibrator.

KW - nucl-ex

KW - hep-ph

KW - nucl-th

KW - physics.atom-ph

U2 - 10.1103/PhysRevLett.124.042503

DO - 10.1103/PhysRevLett.124.042503

M3 - Article

SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

M1 - 042503

ER -

Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive 222Ra and 228Ra beams

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Evolution of octupole deformation in radium nuclei from Coulomb excitation of radioactive ²²²Ra and ²²⁸Ra beams