Coulomb excitation of pear-shaped nuclei

Peter Butler; Liam Gaffney; Pietro Spagnoletti; Joonas Konki; Marcus Scheck; John Smith; Kenzo Abrahams; Michael Bowry; Joakim Cederkäll; Timothy Chupp; Giacomo de Angelis; Hilde De Witte; Paul Garrett; Alina Goldkuhle; Corinna Henrich; Andres Illana; Karl Johnston; David Joss; James Keatings; Nicola Kelly; Michalina Komorowska; Thorsten Kröll; Miguel Lozano; Bondili Nara Singh; David O'Donnell; Joonas Ojala; Robert Page; Line Pedersen; Christopher Raison; Peter Reiter; Jose Alberto Rodriguez; Dawid Rosiak; Sebastian Rothe; Timur Shneidman; Burkhard Siebeck; Michael Seidlitz; Jacqueline Sinclair; Marek Stryjczyk; Piet Van Duppen; Silvia Vinals; Ville Virtanen; Nigel Warr; Kasia Wrzosek-Lipska; Magda Zielinska

doi:10.1051/epjconf/201922301007

Coulomb excitation of pear-shaped nuclei

Peter Butler^*, Liam Gaffney, Pietro Spagnoletti, Joonas Konki, Marcus Scheck, John Smith, Kenzo Abrahams, Michael Bowry, Joakim Cederkäll, Timothy Chupp, Giacomo de Angelis, Hilde De Witte, Paul Garrett, Alina Goldkuhle, Corinna Henrich, Andres Illana, Karl Johnston, David Joss, James Keatings, Nicola KellyMichalina Komorowska, Thorsten Kröll, Miguel Lozano, Bondili Nara Singh, David O'Donnell, Joonas Ojala, Robert Page, Line Pedersen, Christopher Raison, Peter Reiter, Jose Alberto Rodriguez, Dawid Rosiak, Sebastian Rothe, Timur Shneidman, Burkhard Siebeck, Michael Seidlitz, Jacqueline Sinclair, Marek Stryjczyk, Piet Van Duppen, Silvia Vinals, Ville Virtanen, Nigel Warr, Kasia Wrzosek-Lipska, Magda Zielinska

^*Corresponding author for this work

School of Computing, Engineering and Physical Sciences

Research output: Contribution to journal › Article › peer-review

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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 ²²⁴Rn and ²²⁶Rn by accelerating beams of these radioactive nuclei. 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.

Original language	English
Article number	01007
Number of pages	5
Journal	EPJ Web of Conferences
Volume	223
DOIs	https://doi.org/10.1051/epjconf/201922301007
Publication status	Published - 4 Dec 2019

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10.1051/epjconf/201922301007Licence: CC BY 4.0

Butler et al Coulomb finalFinal published version, 1.14 MBLicence: CC BY 4.0

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Butler, P., Gaffney, L., Spagnoletti, P., Konki, J., Scheck, M., Smith, J., Abrahams, K., Bowry, M., Cederkäll, J., Chupp, T., de Angelis, G., Witte, H. D., Garrett, P., Goldkuhle, A., Henrich, C., Illana, A., Johnston, K., Joss, D., Keatings, J., ... Zielinska, M. (2019). Coulomb excitation of pear-shaped nuclei. EPJ Web of Conferences, 223, Article 01007. https://doi.org/10.1051/epjconf/201922301007

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title = "Coulomb excitation of pear-shaped nuclei",

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 224Rn and 226Rn by accelerating beams of these radioactive nuclei. 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.",

author = "Peter Butler and Liam Gaffney and Pietro Spagnoletti and Joonas Konki and Marcus Scheck and John Smith and Kenzo Abrahams and Michael Bowry and Joakim Cederk{\"a}ll and Timothy Chupp and {de Angelis}, Giacomo and Witte, {Hilde De} and Paul Garrett and Alina Goldkuhle and Corinna Henrich and Andres Illana and Karl Johnston and David Joss and James Keatings and Nicola Kelly and Michalina Komorowska and Thorsten Kr{\"o}ll and Miguel Lozano and Singh, {Bondili Nara} and David O'Donnell and Joonas Ojala and Robert Page and Line Pedersen and Christopher Raison and Peter Reiter and Rodriguez, {Jose Alberto} and Dawid Rosiak and Sebastian Rothe and Timur Shneidman and Burkhard Siebeck and Michael Seidlitz and Jacqueline Sinclair and Marek Stryjczyk and Duppen, {Piet Van} and Silvia Vinals and Ville Virtanen and Nigel Warr and Kasia Wrzosek-Lipska and Magda Zielinska",

year = "2019",

month = dec,

day = "4",

doi = "10.1051/epjconf/201922301007",

language = "English",

volume = "223",

journal = "EPJ Web of Conferences",

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Butler, P, Gaffney, L, Spagnoletti, P, Konki, J, Scheck, M , Smith, J, Abrahams, K, Bowry, M, Cederkäll, J, Chupp, T, de Angelis, G, Witte, HD, Garrett, P, Goldkuhle, A, Henrich, C, Illana, A, Johnston, K, Joss, D, Keatings, J, Kelly, N, Komorowska, M, Kröll, T, Lozano, M, Singh, BN , O'Donnell, D, Ojala, J, Page, R, Pedersen, L, Raison, C, Reiter, P, Rodriguez, JA, Rosiak, D, Rothe, S, Shneidman, T, Siebeck, B, Seidlitz, M, Sinclair, J, Stryjczyk, M, Duppen, PV, Vinals, S, Virtanen, V, Warr, N, Wrzosek-Lipska, K & Zielinska, M 2019, 'Coulomb excitation of pear-shaped nuclei', EPJ Web of Conferences, vol. 223, 01007. https://doi.org/10.1051/epjconf/201922301007

TY - JOUR

T1 - Coulomb excitation of pear-shaped nuclei

AU - Butler, Peter

AU - Gaffney, Liam

AU - Spagnoletti, Pietro

AU - Konki, Joonas

AU - Scheck, Marcus

AU - Smith, John

AU - Abrahams, Kenzo

AU - Bowry, Michael

AU - Cederkäll, Joakim

AU - Chupp, Timothy

AU - de Angelis, Giacomo

AU - Witte, Hilde De

AU - Garrett, Paul

AU - Goldkuhle, Alina

AU - Henrich, Corinna

AU - Illana, Andres

AU - Johnston, Karl

AU - Joss, David

AU - Keatings, James

AU - Kelly, Nicola

AU - Komorowska, Michalina

AU - Kröll, Thorsten

AU - Lozano, Miguel

AU - Singh, Bondili Nara

AU - O'Donnell, David

AU - Ojala, Joonas

AU - Page, Robert

AU - Pedersen, Line

AU - Raison, Christopher

AU - Reiter, Peter

AU - Rodriguez, Jose Alberto

AU - Rosiak, Dawid

AU - Rothe, Sebastian

AU - Shneidman, Timur

AU - Siebeck, Burkhard

AU - Seidlitz, Michael

AU - Sinclair, Jacqueline

AU - Stryjczyk, Marek

AU - Duppen, Piet Van

AU - Vinals, Silvia

AU - Virtanen, Ville

AU - Warr, Nigel

AU - Wrzosek-Lipska, Kasia

AU - Zielinska, Magda

PY - 2019/12/4

Y1 - 2019/12/4

N2 - 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 224Rn and 226Rn by accelerating beams of these radioactive nuclei. 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.

AB - 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 224Rn and 226Rn by accelerating beams of these radioactive nuclei. 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.

U2 - 10.1051/epjconf/201922301007

DO - 10.1051/epjconf/201922301007

M3 - Article

SN - 2100-014X

VL - 223

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 01007

ER -

Coulomb excitation of pear-shaped nuclei

Abstract

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