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Readout scheme for solid-state nuclear clock

Total Cost €


EC-Contrib. €






Project "CRYSTALCLOCK" data sheet

The following table provides information about the project.


Organization address
address: KARLSPLATZ 13
city: WIEN
postcode: 1040

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Austria [AT]
 Total cost 186˙167 €
 EC max contribution 186˙167 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2019
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2020
 Duration (year-month-day) from 2020-04-01   to  2022-03-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    TECHNISCHE UNIVERSITAET WIEN AT (WIEN) coordinator 186˙167.00


 Project objective

The low-energy excited state of the Thorium-229 (229Th) nucleus has fascinated researchers for decades. With excitation energy of only a few eV, it is the only known nuclear isomeric state accessible to laser manipulation. This system opens up many novel applications, ranging from tests of variations of the fundamental constants to technological implementations as a nuclear clock. While the exact excitation energy of the 229Th isomer remains unknown, significant progress has been made in constraining its energy in recent months. Most importantly, all recent results place the energy between 7.5 eV to 8.5 eV. This is within the transmission band of large-band-gap VUV materials such as single fluoride crystals. It becomes hence possible to embed 229Th inside a solid-state crystal and address a large number of nuclei. This project aims to develop a readout scheme for a solid-state nuclear clock based on nuclear quadrupole resonance spectroscopy (NQRS). The interaction of the nuclear quadrupole moment with the electric field gradient of the crystal causes the splitting of the nuclear states. NQRS can be used for non-destructive readout of the nuclear state during clock operation. Moreover, the NQRS will provide valuable information about the microscopic structure of 229Th atoms doped into the crystal lattice.

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The information about "CRYSTALCLOCK" are provided by the European Opendata Portal: CORDIS opendata.

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