Conclusion and Outlook

Chapter
Part of the Springer Theses book series (Springer Theses)

Abstract

In the following, the results of the presented work will be shortly summarized and interpreted with respect to ongoing experimental efforts on \(^{229}\)Th in different groups. Also perspectives for future experiments are given, that would provide a step towards the development of a \(^{229}\)Th-based nuclear frequency standard.

References

  1. 1.
    von der Wense L et al (2016) Direct detection of the \(^{229}\)Th nuclear clock transition. Nature 533:47–51Google Scholar
  2. 2.
    Peko BL et al (2000) Absolute detection efficiencies of low energy H, H\(^-\), H\(^+\), H\(^+_2\), H\(^+_3\) incident on a multichannel plate detector. Nucl Instrum Methods Phys Res Sect B 171:597–604Google Scholar
  3. 3.
    Bay HL, Winters HF, Coufal HJ, Eckstein W (1992) Energy transfer to a copper surface by low energy noble gas ion bombardment. Appl Phys A Sol Surf 55:174–278Google Scholar
  4. 4.
    Porsev SG et al (2010) Excitation of the isomeric \(^{229\text{m}}\)Th nuclear state via an electronic bridge process in \(^{229}\)Th\(^+\). Phys Rev Lett 105:182501Google Scholar
  5. 5.
    Beck BR et al (2009) Improved value for the energy splitting of the ground-state doublet in the nucleus \(^{229\text{ m }}\)Th. LLNL-PROC-415170Google Scholar
  6. 6.
    Tkalya EV et al (2000) Decay of the low-energy nuclear isomer \(^{229}\)Th\(^m\)(3/2\(^+\), 3.5\(\pm \)1.0 eV) in solids (dielectrics and metals): a new scheme of experimental research. Phys Rev C 61:064308Google Scholar
  7. 7.
    Borisyuk PV et al (2015) Band structure and decay channels of thorium-229 low lying isomeric state for ensemble of thorium atoms adsorbed on calcium fluoride. Phys Stat Solidi C 12:1333–1337CrossRefGoogle Scholar
  8. 8.
    Seiferle B et al (2017) Lifetime measurement of the \(^{229}\)Th nuclear isomer. Phys Rev Lett 118:042501Google Scholar
  9. 9.
    Karpeshin FF, Trzhaskovskaya MB (2007) Impact of the electron environment on the lifetime of the \(^{229}\)Th\(^m\) low-lying isomer. Phys Rev C 76:054313Google Scholar
  10. 10.
    Tkalya EV et al (2015) Radiative lifetime and energy of the low-energy isomeric level in \(^{229}\)Th. Phys Rev C 92:054324Google Scholar
  11. 11.
    Rellergert WG et al (2010) Constraining the evolution of the fundamental constants with a solid-state optical frequency reference based on the \(^{229}\)Th nucleus. Phys Rev Lett 104:200802Google Scholar
  12. 12.
    Yamakita Y et al (2000) A highly sensitive electron spectrometer for crossed-beam collisional ionization: a retarding-type magnetic bottle analyzer and its application to collision-energy resolved Penning ionization electron spectroscopy. Rev Sci Instrum 71:3042–3049ADSCrossRefGoogle Scholar
  13. 13.
    Schwarz M et al (2012) Cryogenic linear paul trap for cold highly charged ion experiments. Rev Sci Instrum 83:083115ADSCrossRefGoogle Scholar
  14. 14.
    Schmöger L et al (2015) Coulomb crystallization of highly charged ions. Science 347:1233–1236ADSCrossRefGoogle Scholar
  15. 15.
    von der Wense L et al (2013) Towards a direct transition energy measurement of the lowest nuclear excitation in \(^{229}\)Th. JINST 8:P03005Google Scholar
  16. 16.
    Seiferle B (2015) Setup of a VUV detection system for the direct identification of the fluorescence radiation of \(^{229\rm {m}}\)Th. Master Thesis, LMU Munich, GermanyGoogle Scholar
  17. 17.
    Campbell CJ et al (2011) Wigner Crystals of \(^{229}\)Th for optical excitation of the nuclear isomer. Phys Rev Lett 106:223001Google Scholar

Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  1. 1.Department of Medical PhysicsLudwig-Maximilians-UniversityGarching, BavariaGermany

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