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1.
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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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2.
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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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3.
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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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4.
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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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5.
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Testing ab initio nuclear structure in neutron-rich nuclei: lifetime measurements of second 2$^+$ states in $^{16}$C and $^{20}$O
/ Ciemala, M. (Cracow, INP) ; Ziliani, S. (Milan U. ; INFN, Milan) ; Crespi, F.C.L. (Milan U. ; INFN, Milan) ; Leoni, S. (Milan U. ; INFN, Milan) ; Fornal, B. (Cracow, INP) ; Maj, A. (Cracow, INP) ; Bednarczyk, P. (Cracow, INP) ; Benzoni, G. (INFN, Milan) ; Bracco, A. (Milan U. ; INFN, Milan) ; Boiano, C. (INFN, Milan) et al.
To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2+ state in neutron-rich 20O, tau(2+_2 ) = 150(+80-30) fs, and an estimate for the lifetime of the second 2+ state in 16C have been obtained, for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds femtoseconds range, by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction 18O (7.0 MeV/u) + 181Ta. [...]
arXiv:2002.04814.-
2020-02-28 - 7 p.
- Published in : Phys. Rev. C 101 (2020) 021303
Fulltext: PDF; Published fulltext: PhysRevC.101.021303 - PDF; 0144fdb9ec521f98f02c56efc9fa40a9 - PDF;
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6.
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Evolution of Octupole Deformation in Radium Nuclei from Coulomb Excitation of Radioactive $^{222}\mathrm{Ra}$ and $^{228}\mathrm{Ra}$ Beams
/ Butler, P.A. (U. Liverpool (main)) ; Gaffney, L.P. (U. Liverpool (main) ; CERN) ; Spagnoletti, P. (Paisley U.) ; Abrahams, K. (Western Cape U.) ; Bowry, M. (Paisley U. ; TRIUMF) ; Cederkäll, J. (Lund U.) ; de Angelis, G. (INFN, Legnaro) ; De Witte, H. (Leuven U.) ; Garrett, P.E. (Guelph U.) ; Goldkuhle, A. (Cologne U.) et al.
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 $^{222,228}$Ra nuclei using the method of sub-barrier, multi-step Coulomb excitation. [...]
arXiv:2001.09681.-
2020-02-01 - 6 p.
- Published in : Phys. Rev. Lett. 124 (2020) 042503
Fulltext: PDF; Fulltext from publisher: PDF;
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7.
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Lifetime measurements in $^{52,54}$Ti to study shell evolution toward $N=32$
/ AGATA Collaboration
Lifetimes of the excited states in the neutron-rich Ti52,54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accélérateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the γ-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. [...]
2019 - 12 p.
- Published in : Phys. Rev. C 100 (2019) 054317
Fulltext: PDF;
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8.
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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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9.
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Pairing-quadrupole interplay in the neutron-deficient tin nuclei: first lifetime measurements of low-lying states in $^{106,108}$Sn
/ Siciliano, M. (INFN, Legnaro ; Padua U. ; IRFU, Saclay) ; Valiente-Dobón, J.J. (INFN, Legnaro) ; Goasduff, A. (INFN, Legnaro ; Padua U. ; INFN, Padua) ; Nowacki, F. (Strasbourg, IPHC) ; Zuker, A.P. (Strasbourg, IPHC) ; Bazzacco, D. (INFN, Padua) ; Lopez-Martens, A. (CSNSM, Orsay) ; Clément, E. (GANIL) ; Benzoni, G. (INFN, Milan) ; Braunroth, T. (Cologne U.) et al.
The lifetimes of the low-lying excited states $2^+$ and $4^+$ have been directly measured in the neutron-deficient $^{106,108}$Sn isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. [...]
arXiv:1905.10313.-
2020-07-10 - 6 p.
- Published in : Phys. Lett. B 806 (2020) 135474
Article from SCOAP3: PDF; Fulltext: PDF; Fulltext from publisher: PDF;
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10.
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Investigation of Octupole Correlations in $^{144,145}$Ba using the Recoil Distance Doppler-shift Technique
/ Fransen, Christoph (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Braunroth, Thomas (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Bast, Marcel (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Beckers, Marcel (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Blazhev, Andrey (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Dewald, Alfred (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Gaffney, Liam (Physics Department, ISOLDE, CERN, 1211 Geneva 23, Switzerland) ; Goldkuhle, Alina (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Hess, Herbert (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) ; Jolie, Jan (Institut f\"ur Kernphysik, Universit\"at zu K\"oln, 50937 Cologne, Germany) et al.
CERN-INTC-2018-011 ; INTC-CLL-037.
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2018.
Fulltext - Original Document (INTC-P-530)
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