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Coulomb excitation of pear-shaped nuclei
/ Butler, Peter (Liverpool U.) ; Gaffney, Liam (Liverpool U. ; CERN) ; Spagnoletti, Pietro (West Scotland U.) ; Konki, Joonas (CERN) ; Scheck, Marcus (West Scotland U.) ; Smith, John (West Scotland U.) ; Abrahams, Kenzo (Western Cape U.) ; Bowry, Michael (TRIUMF) ; Cederkäll, Joakim (Lund U.) ; Chupp, Timothy (Michigan U.) et al.
There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. [...]
2019 - 5 p.
- Published in : EPJ Web Conf. 223 (2019) 01007
Fulltext: PDF;
In : IV International Conference on Nuclear Structure and Dynamics (NSD2019), Venice, Italy, 13 -17 May 2019, pp.01007
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3.
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Coulomb excitation of $^{222}$Rn
/ Spagnoletti, P (West Scotland U. ; Simon Fraser U., Dept. Chem.) ; Butler, P A (Liverpool U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Abrahams, K (Western Cape U.) ; Bowry, M (West Scotland U. ; TRIUMF) ; Cederkäll, J (Lund U.) ; Chupp, T (U. Michigan, Ann Arbor) ; de Angelis, G (INFN, Legnaro) ; De Witte, H (Leuven U.) ; Garrett, P E (Guelph U.) et al.
The nature of quadrupole and octupole collectivity in $^{222}$Rn was investigated by determining the electric-quadrupole (E2) and octupole (E3) matrix elements using subbarrier, multistep Coulomb excitation. The radioactive $^{222}$Rn beam, accelerated to 4.23 MeV/u, was provided by the HIE-ISOLDE facility at CERN. [...]
2022 - 10 p.
- Published in : Phys. Rev. C 105 (2022) 024323
Fulltext: PDF;
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Publisher Correction: The observation of vibrating pear-shapes in radon nuclei [doi: 10.1038/s41467-019-10494-5]
/ Butler, P A (Liverpool U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Spagnoletti, P (West Scotland U.) ; Konki, J (CERN) ; Scheck, M (West Scotland U.) ; Smith, J F (West Scotland U.) ; Abrahams, K (Western Cape U.) ; Bowry, M (TRIUMF) ; Cederkäll, J (Lund U.) ; Chupp, T et al.
An amendment to this paper has been published and can be accessed via a link at the top of the paper..
2020 - 1 p.
- Published in : Nature Commun. 11 (2020) 5185
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5.
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Addendum: The observation of vibrating pear-shapes in radon nuclei
/ Butler, P A (Liverpool U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Spagnoletti, P (West Scotland U.) ; Konki, J (CERN) ; Scheck, M (West Scotland U.) ; Smith, J F (West Scotland U.) ; Abrahams, K (Western Cape U.) ; Bowry, M (TRIUMF) ; Cederkäll, J (Lund U.) ; Chupp, T (Michigan U.) et al.
2020
- Published in : Nature Commun. 11 (2020) 3560
Fulltext: PDF; External link: Fulltext from publisher
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6.
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The observation of vibrating pear-shapes in radon nuclei
/ Butler, P.A. (Liverpool U.) ; Gaffney, L.P. (Liverpool U. ; CERN) ; Spagnoletti, P. (West Scotland U.) ; Konki, J. (CERN) ; Scheck, M. (West Scotland U.) ; Smith, J.F. (West Scotland U.) ; Abrahams, K. (Western Cape U.) ; Bowry, M. (TRIUMF) ; Cederkäll, J. (Lund U.) ; Chupp, T. (Michigan U.) et al.
There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. [...]
arXiv:2003.10147.-
2019-06-06 - 6 p.
- Published in : Nature Commun. 10 (2019) 2473
Fulltext: 2003.10147 - PDF; 7a6aa522dd658653207485bc1ee38876 - PDF; s41467-019-10494-5 - PDF;
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7.
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The application of ISS to measure E3 transition strengths in rare-earth and EDM candidate nuclei.
/ Butler, Peter; University of Liverpool ; Catford, Wilton; University of Surrey ; Chupp, Timothy; University of Michigan ; Cline, Douglas; University of Rochester ; Doherty, Daniel; University of Surrey ; Fraser, Matthew; CERN ; Freeman, Sean; University of Manchester ; Gaffney, Liam; CERN ; Garrett, Paul; University of Guelph ; Hadyńska-Klęk, Katarzyna; INFN Laboratori Nazionali di Legnaro et al.
CERN-INTC-2017-052 ; INTC-I-187.
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2017.
Fulltext
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Determination of the B(E3, 0(+) -> 3(-))-excitation strength in octupole-correlated nuclei near A approx 224 by the means of Coulomb excitation at REX-ISOLDE
/ Scheck, M ; Gaffney, L P ; Butler, P A ; Hayes, A B ; Wenander, F (CERN) ; Albers, M ; Bastin, B ; Bauer, C ; Blazhev, A ; Bönig, S et al.
The IS475 collaboration conducted Coulomb-excitation experiments with postaccelerated radioactive (220)Rn and (224)Ra beams at the REX-ISOLDE facility. The beam particles (E(beam) ≈ 2.83 MeV/u) were Coulomb excited using (60)Ni, (114)Cd, and (120)Sn scattering targets. [...]
2014 - 4 p.
- Published in : J. Phys.: Conf. Ser. 533 (2014) 012007
In : 20th International School on Nuclear Physics, Neutron Physics and Applications, Varna, Bulgaria, 16 - 22 Sep 2013, pp.012007
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A magnetically shielded room with ultra low residual field and gradient
/ Altarev, I. (Munich, Tech. U.) ; Babcock, E. (ZAT, Julich) ; Beck, D. (Illinois U., Urbana (main)) ; Burghoff, M. (Berlin, Phys. Tech. Bund.) ; Chesnevskaya, S. (Munich, Tech. U.) ; Chupp, T. (Michigan U.) ; Degenkolb, S. (Michigan U.) ; Fan, I. (Berlin, Phys. Tech. Bund.) ; Fierlinger, P. (EFDA-CSU, Garching ; Munich, Tech. U.) ; Frei, A. (Forschungsreaktor Munich) et al.
A versatile and portable magnetically shielded room with a field of (700 \pm 200) pT within a central volume of 1m x 1m x 1m and a field gradient less than 300 pT/m is described. This performance represents more than a hundred-fold improvement of the state of the art for a two-layer magnetic shield and provides an environment suitable for a next generation of precision experiments in fundamental physics at low energies; in particular, searches for electric dipole moments of fundamental systems and tests of Lorentz-invariance based on spin-precession experiments. [...]
arXiv:1403.6467.-
2014 - 9 p.
- Published in : Rev. Sci. Instrum. 85 (2014) 075106
Fulltext: PDF; External link: Preprint
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Studies of pear-shaped nuclei using accelerated radioactive beams
/ Gaffney, L P (Liverpool U.) ; Butler, P A (Liverpool U.) ; Scheck, M (Liverpool U. ; Darmstadt, Tech. Hochsch.) ; Hayes, A B (Rochester U.) ; Wenander, F (CERN) ; Albers, M (Cologne U.) ; Bastin, B (GANIL) ; Bauer, C (Darmstadt, Tech. Hochsch.) ; Blazhev, A (Cologne U.) ; Bonig, S (Darmstadt, Tech. Hochsch.) et al.
There is strong circumstantial evidence that certain heavy, unstable atomic nuclei are ‘octupole deformed’, that is, distorted into a pear shape. This contrasts with the more prevalent rugby-ball shape of nuclei with reflection-symmetric, quadrupole deformations. [...]
2013
- Published in : Nature 497 (2013) 199-204
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