Springer : The observation of vibrating pear-shapes in radon nuclei

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

doi:10.1038/s41467-019-10494-5

Published Articles
Report number	arXiv:2003.10147
Title	The observation of vibrating pear-shapes in radon nuclei
Author(s)	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.) ; de Angelis, G. (INFN, Legnaro) ; De Witte, H. (Leuven U.) ; Garrett, P.E. (Guelph U.) ; Goldkuhle, A. (Cologne U.) ; Henrich, C. (Darmstadt, Tech. U.) ; Illana, A. (INFN, Legnaro) ; Johnston, K. (CERN) ; Joss, D.T. (Liverpool U.) ; Keatings, J.M. (West Scotland U.) ; Kelly, N.A. (West Scotland U.) ; Komorowska, M. (Warsaw U., Heavy Ion Lab) ; Kröll, T. (Darmstadt, Tech. U.) ; Lozano, M. (CERN) ; Nara Singh, B.S. (West Scotland U.) ; O'Donnell, D. (West Scotland U.) ; Ojala, J. (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Page, R.D. (Liverpool U.) ; Pedersen, L.G. (Oslo U.) ; Raison, C. (York U., England) ; Reiter, P. (Cologne U.) ; Rodriguez, J.A. (CERN) ; Rosiak, D. (Cologne U.) ; Rothe, S. (CERN) ; Seidlitz, M. (Cologne U.) ; Shneidman, T.M. (Dubna, JINR) ; Siebeck, B. (Cologne U.) ; Sinclair, J. (West Scotland U.) ; Stryjczyk, M. (Leuven U.) ; Van Duppen, P. (Leuven U.) ; Vinals, S. (CSIC, Madrid) ; Virtanen, V. (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Warr, N. (Cologne U.) ; Wrzosek-Lipska, K. (Warsaw U., Heavy Ion Lab) ; Zielinska, M. (IRFU, Saclay)
Publication	2019-06-06
Imprint	2020-03-23
Number of pages	6
Note	Updated from Nat. Comm. 10 (2019) 2473
In:	Nature Commun. 10 (2019) 2473
DOI	10.1038/s41467-019-10494-5
Subject category	Nuclear Physics - Experiment
Abstract	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. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we have observed the low-lying quantum states in $^{224}$Rn and $^{226}$Rn by accelerating beams of these radioactive nuclei. We report here additional states not assigned in our 2019 publication. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
Copyright/License	publication: © 2019-2024 The Authors (License: CC-BY-4.0)

$Spectra of $\gamma$-rays. The $\gamma$-rays were emitted following the bombardment of $^{120}$Sn targets by $^{222}$Rn (black), $^{224}$Rn (blue), and $^{226}$Rn (red). The $\gamma$-rays were corrected for Doppler shift assuming that they are emitted from the scattered projectile. Random coincidences between Miniball $\gamma$-ray and silicon particle detectors have been subtracted. The transitions which give rise to the observed full-energy peaks are labelled by the spin and parity of the initial and final quantum states. The assignments of the transitions from the negative parity states in $^{224,226}$Rn are tentative (see text).$ $Spectra of $\gamma$-rays. The $\gamma$-rays were emitted following the bombardment of $^{120}$Sn targets by $^{222}$Rn (black), $^{224}$Rn (blue), and $^{226}$Rn (red). The $\gamma$-rays were corrected for Doppler shift assuming that they are emitted from the scattered projectile. Random coincidences between Miniball $\gamma$-ray and silicon particle detectors have been subtracted. The transitions which give rise to the observed full-energy peaks are labelled by the spin and parity of the initial and final quantum states. The assignments of the transitions from the negative parity states in $^{224,226}$Rn are tentative (see text).$ $Coincidence $\gamma$-ray spectra. The representative background-subtracted $\gamma$-ray spectra are in time-coincidence with different gating transitions. Here the observed peaks are labelled by the energy (in keV) of the transition. The gating transition is additionally labelled by the proposed spin and parity of the initial and final states.$ Show more plots

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記錄創建於2019-09-13，最後更新在2024-05-08

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