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  Nuclear Excitation of the 229Th Isomer via Defect States in Doped Crystals

Nickerson, B. S., Pimon, M., Bilous, P. V., Gugler, J., Beeks, K., Sikorsky, T., et al. (2020). Nuclear Excitation of the 229Th Isomer via Defect States in Doped Crystals. Physical Review Letters, 125(3): 032501. doi:10.1103/PhysRevLett.125.032501.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-BEFE-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-BEFF-6
Genre: Journal Article

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2004.09992.pdf (Preprint), 530KB
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 Creators:
Nickerson, Brenden Scott1, Author              
Pimon, Martin2, Author
Bilous, Pavlo V.1, Author              
Gugler, Johannes2, Author
Beeks, Kjeld3, Author
Sikorsky, Tomas3, Author
Mohn, Peter2, Author
Schumm, Thorsten3, Author
Pálffy, Adriana1, Author              
Affiliations:
1Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society, ou_904546              
2Center for Computational Material Science, Technische Universität Wien, 1040 Vienna, Austria, ou_persistent22              
3Atominstitut, Technische Universität Wien, 1020 Vienna, Austria, ou_persistent22              

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Free keywords: Condensed Matter, Materials Science, cond-mat.mtrl-sci,Nuclear Experiment, nucl-ex,Quantum Physics, quant-ph
 MPINP: Research group A. Pálffy – Division C. H. Keitel
 Abstract: When Th nuclei are doped in CaF2 crystals, a set of electronic defect states appears in the crystal bandgap which would otherwise provide complete transparency to vacuum-ultraviolet radiation. The coupling of these defect states to the 8 eV 229mTh nuclear isomer in the CaF2 crystal is investigated theoretically. We show that although previously viewed as a nuisance, the defect states provide a starting point for nuclear excitation via electronic bridge mechanisms involving stimulated emission or absorption using an optical laser. The rates of these processes are at least two orders of magnitude larger than direct photoexcitation of the isomeric state using available light sources. The nuclear isomer population can also undergo quenching when triggered by the reverse mechanism, leading to a fast and controlled decay via the electronic shell. These findings are relevant for a possible solid-state nuclear clock based on the 229mTh isomeric transition.

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 Dates: 2020-07-13
 Publication Status: Published online
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 Identifiers: arXiv: 2004.09992
DOI: 10.1103/PhysRevLett.125.032501
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 125 (3) Sequence Number: 032501 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1