Logo PTB


doctoral candidate specializing in physics (19-106-4)Wednesday, 25. September 2019

The Physikalisch-Technische Bundesanstalt (PTB) is the National Metrology Institute of the Federal Republic of Germany with scientific and technical service tasks. It furthers progress and reliability in metrology for society, the economy and science.


In Department 4.4, Time and Frequency, of Division 4, we are looking for a


doctoral candidate specializing in physics


to join us as soon as possible.


This position is available on the basis of a 3-year fixed-term contract. You will be employed at our Braunschweig site.


The remuneration will be paid in accordance with remuneration group 13 TVöD Bund (85 %).



Your tasks:

The thorium-229 nucleus has a state at an unusually low excitation energy of approximately 8 eV in the range of ultraviolet light. For the first time, this allows laser spectroscopy methods to be applied to a nuclear transition and opens up the possibility for a novel, extremely precise optical "nuclear clock". Within the scope of this project, we offer the opportunity of undertaking experimental research in a new, interdisciplinary field of work between quantum optics, atomic and nuclear physics. This project is part of DFG's Collaborative Research Center DQ-mat of Leibniz Universität Hannover, Germany.


Now that the transition energy of Th-229 at 8.3 eV is better known (www.nuclock.eu) thanks to electron- and gamma spectroscopy, we are aiming to investigate the resonant laser excitation and laser spectroscopy of the Th-229 nucleus with trapped ions.

Your tasks in more detail: 

  • Using electronic bridge processes promising enhanced coupling of the nucleus to the laser via the electron shell
  • Investigating direct resonant excitation with a pulsed VUV laser that is currently still under development


Your profile:

  • You have completed university studies in physics (German Diplom or Master's).
  • Experimental experience in the fields of laser spectroscopy and atomic or nuclear physics would be an advantage.
  • You are interested in experimental research in a new interdisciplinary field of work.
  • You have a good command of spoken and written English.
  • You have excellent communication skills and are a team player.
  • You are willing to travel within the scope of your assignment.



For further information with regard to this position, please contact:
Dr. E. Peik, phone: +49 531 592-4400, e-mail: ekkehard.peik(at)ptb.de.



Click here to learn more about our department



PTB promotes the professional equality of women and men and is thus especially interested in applications from women.

Within the scope of the official feasibilities, PTB offers flexible part-time work schemes in order to support in particular the compatibility of work and family life.

Disabled persons will be given priority if they have the same occupational aptitude.


Are you interested? Then we are looking forward to hearing from you.
Please use our

or send us your application to the following postal address:


Physikalisch-Technische Bundesanstalt
Referat "Personal"
Reference number 19-106-4
Bundesallee 100
38116 Braunschweig


Unfortunately, we cannot accept applications sent via e-mail.

The closing date for applications is 25 September 2019.