Ra+ ion trapping: toward an atomic parity violation measurement and an optical clock

Portela, Mayerlin Nunez; Dijck, Elwin; Mohanty, Amita; Bekker, Hendrik; Berg, J. E. van den; Giri, G. S.; Hoekstra, Steven; Onderwater, C. J. G.; Schlesser, S.; Timmermans, Rob G. E.; Versolato, Oscar; Willmann, Lorenz; Wilschut, Hans; Jungmann, K.

doi:10.1007/s00340-013-5603-2

Cited by 32 publications

(40 citation statements)

References 70 publications

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“…We have chosen these atoms because they are considered for the PNC measurements (see, e.g. [22][23][24][25]) and because some isotopes of these atoms have deformed nucleus and therefore large quadrupole moments for both proton and neutron distributions. Electric quadropole moments (Q p ) are known and tabulated [26].…”

Section: Theorymentioning

confidence: 99%

Effect of nuclear quadrupole moments on parity nonconservation in atoms

2017

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Nuclei with spin I ≥ 1 have a weak quadrupole moment which leads to tensor contribution to the parity non-conserving interaction between nuclei and electrons. We calculate this contribution for Yb + , Fr and Ra + and found it to be small. In contrast, in many lanthanides (e.g., Nd, Gd, Dy, Ho, Er, Pr, Sm) and Ra close levels of opposite parity lead to strong enhancement of the effect making it sufficiently large to be measured. Another possibility is to measure the PNC transitions between the hyperfine components of the ground state of Bi. Since nuclear weak charge is dominated by neutrons this opens a way of measuring quadrupole moments of neutron distribution in nuclei.

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Section: Theorymentioning

confidence: 99%

Effect of nuclear quadrupole moments on parity nonconservation in atoms

2017

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“…For this a single ion is stored in a Paul radio frequency ion trap where it needs to be localized to within a fraction of an optical wavelength [14]. In preparation of the parity measurement available spectroscopy data on Ra + has been critically compiled [15], the atomic theory on the heavy alkaline earth atoms is being refined [13], measurements of atomic transition frequencies and isotope shifts [16] and atomic state lifetimes [17] have been conducted in order to test the accuracy of atomic theory on which the success of the project depends [20]. Fig.…”

Section: Atomic Parity Violationmentioning

confidence: 99%

Precision Tests of Discrete Symmetries at Low Energies

Jungmann¹,

Dijck²,

Grasdijk³

et al. 2017

Proceedings of the 12th International Conference on Low Energy Antiproton Physics (LEAP2016)

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Low energy precision measurements provide for precise testing of the Standard Model, e.g. in searches for violations of the discrete symmetries charge conjugation (C), parity (P) and time reversal (T) as well as their combinations CP and CPT. We focus here on new experiments concerning atomic parity violation (APV) and searches for a permanent electric dipole moment (EDM) in atoms. In particular, we address precision APV experiments on Ba + and Ra + single ions that will enable the extraction of the Weinberg angle at lowest presently accessible momentum transfer. They are expected to contribute towards searches for new particles such as dark Z-bosons. We also review experimental programmes in which an EDM is searched for and we compare them in a common framework. We describe latest EDM searches in heavy effective two-electron atoms such as Xe and Hg. We also indicate possible future prospects of searches for a permanent EDM of the electron using molecules with large enhancement factors.

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“…The accurate determination of the transition probability of transitions in heavy alkali earth systems is an important step in the research program to measure Atomic Parity Violation (APV) in such systems [1][2][3][4][5][6][7][8][9]. In the research reported here, a single trapped Ba + ion has been investigated and the lifetime of its 5d 2 D 5/2 state has been measured.…”

Section: Introductionmentioning

confidence: 99%