1.
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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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2.
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Collectivity in ${}^{\mathrm{196,198}}$Pb isotopes probed in Coulomb-excitation experiments at REX-ISOLDE
/ Pakarinen, J (Jyvaskyla U. ; CERN) ; Grahn, T (Jyvaskyla U.) ; Gaffney, L P (KU Leuven, Dept. Phys. Astron. ; Liverpool U.) ; Algora, A (Valencia U., IFIC ; Debrecen, Inst. Nucl. Res.) ; Bauer, C (Darmstadt, Tech. Hochsch.) ; Blazhev, A (Cologne U.) ; Bree, N (KU Leuven, Dept. Phys. Astron.) ; Cocolios, T E (CERN) ; Witte, H De (KU Leuven, Dept. Phys. Astron.) ; Diriken, J (KU Leuven, Dept. Phys. Astron.) et al.
The neutron-deficient ${}^{\mathrm{196,198}}$Pb isotopes have been studied in Coulomb-excitation experiments employing the Miniball γ-ray spectrometer and radioactive ion beams from the REX-ISOLDE post-accelerator at CERN. The reduced transition probabilities of the first excited 2(+) states in (196)Pb and (198)Pb nuclei have been measured for the first time. [...]
2017 - 10 p.
- Published in : J. Phys. G 44 (2017) 064009
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3.
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Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes
/ Kesteloot, N (KU Leuven, Dept. Phys. Astron. ; SCK-CEN, Mol) ; Bastin, B (KU Leuven, Dept. Phys. Astron. ; GANIL) ; Gaffney, L P (KU Leuven, Dept. Phys. Astron. ; Liverpool U.) ; Wrzosek-Lipska, K (KU Leuven, Dept. Phys. Astron. ; Warsaw U., Heavy Ion Lab) ; Auranen, K (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Bauer, C (Darmstadt, Tech. Hochsch.) ; Bender, M (CENBG, Gradignan) ; Bildstein, V (Munich, Tech. U.) ; Blazhev, A (Cologne U.) ; Bönig, S (Darmstadt, Tech. Hochsch.) et al.
Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient Po196,198,200,202 isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes, is extracted. [...]
2015 - 17 p.
- Published in : Phys. Rev. C 92 (2015) 054301
APS Open Access article: PDF;
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4.
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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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5.
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6.
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$^{97}_{37}$Rb$_{60}$: The Cornerstone of the Region of Deformation around $A\sim 100$
/ Sotty, C (CSNSM, Orsay ; Leuven U.) ; Zielińska, M (Warsaw U., Heavy Ion Lab ; IRFU, SPhN, Saclay) ; Georgiev, G (CSNSM, Orsay) ; Balabanski, D L (Bucharest, IFIN-HH) ; Stuchbery, A E (Australian Natl. U., Canberra (main)) ; Blazhev, A (Cologne U.) ; Bree, N (Leuven U.) ; Chevrier, R (CEA DAM) ; Das Gupta, S (U. Camerino, Dept. Phys. ; INFN, Perugia) ; Daugas, J M (CEA DAM) et al.
Excited states of the neutron-rich nuclei Rb97,99 were populated for the first time using the multistep Coulomb excitation of radioactive beams. Comparisons of the results with particle-rotor model calculations provide clear identification for the ground-state rotational band of Rb97 as being built on the πg9/2 [431] 3/2+ Nilsson-model configuration. [...]
2015 - 6 p.
- Published in : Phys. Rev. Lett.
- Published in : Phys. Rev. Lett.
APS Open Access article: PDF; Publisher’s Note: PDF;
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7.
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Coulomb excitation of neutron-rich Cd isotopes
/ Ilieva, S (Tech. U. Darmstadt, Inst. Nucl. Phys.) ; Thürauf, M (Tech. U. Darmstadt, Inst. Nucl. Phys.) ; Kröll, Th (Tech. U. Darmstadt, Inst. Nucl. Phys.) ; Krücken, R (Munich, Tech. U.) ; Behrens, T (Munich, Tech. U.) ; Bildstein, V (Munich, Tech. U. ; Heidelberg, Max Planck Inst.) ; Blazhev, A (Cologne U.) ; Bönig, S (Tech. U. Darmstadt, Inst. Nucl. Phys.) ; Butler, P A (Liverpool U.) ; Cederkäll, J (CERN) et al.
The isotopes Cd122,124,126 were studied in a “safe” Coulomb-excitation experiment at the radioactive ion-beam facility REX-ISOLDE at CERN. The reduced transition probabilities B(E2;0g.s.+→21+) and limits for the quadrupole moments of the first 2+ excited states in the three isotopes were determined. [...]
2014 - 10 p.
- Published in : Phys. Rev. C 89 (2014) 014313
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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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Quadrupole deformation of $^{130}$Xe measured in a Coulomb-excitation experiment
/ Morrison, L (Surrey U.) ; Hadyńska-Klȩk, K (Warsaw U., Heavy Ion Lab ; Surrey U.) ; Podolyák, Zs (Surrey U.) ; Doherty, D T (Surrey U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Kaya, L (Cologne U.) ; Próchniak, L (Warsaw U., Heavy Ion Lab) ; Samorajczyk-Pyśk, J (Warsaw U., Heavy Ion Lab) ; Srebrny, J (Warsaw U., Heavy Ion Lab) ; Berry, T (Surrey U.) et al.
Low-lying states in the isotope $^{130}$Xe were populated in a Coulomb-excitation experiment performed at CERN's HIE-ISOLDE facility. The magnitudes and relative signs of seven $E2$ matrix elements and one $M1$ matrix element coupling five low-lying states in $^{130}$Xe were determined using the semiclassical coupled-channel Coulomb-excitation least-squares search code gosia. [...]
2020 - 13 p.
- Published in : Phys. Rev. C 102 (2020) 054304
Fulltext: PDF;
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10.
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Microscopic structure of coexisting $0^+$ states in $^{68}$Ni probed via two-neutron transfer
/ Flavigny, F (Orsay, IPN ; KU Leuven, Dept. Phys. Astron.) ; Elseviers, J (KU Leuven, Dept. Phys. Astron.) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Bauer, C (Darmstadt, Tech. Hochsch.) ; Bildstein, V (Guelph U.) ; Blazhev, A (Cologne U.) ; Brown, B A (Michigan State U., NSCL) ; De Witte, H (KU Leuven, Dept. Phys. Astron.) ; Diriken, J (KU Leuven, Dept. Phys. Astron. ; SCK-CEN, Mol) ; Fedosseev, V N (CERN) et al.
The structure of low-spin states originating from shape-coexisting configurations in $^{68}_{40}$Ni$_{28}$ was directly probed via the two-neutron transfer reaction $^{66}$Ni$(t,p)^{68}$Ni in inverse kinematics using a radioactive ion beam on a radioactive target. The direct feeding to the first excited 0$^+$ state was measured for center-of-mass angles 4°–16° and amounts to an integral of 4.2(16)% relative to the ground state. [...]
2019 - 6 p.
- Published in : Phys. Rev. C 99 (2019) 054332
Article from SCOAP3: PDF;
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