My watch list


Prof. Dr. Joachim H. Ullrich

Physikalisch-Technische Bundesanstalt (PTB)


Prof. Dr. Joachim H. Ullrich

Joachim Ullrich, born in 1956, studied geophysics and physics at the University of Frankfurt where, after graduating in 1983, he also completed his doctorate in 1987 and qualified as a professor in 1994. From 1989 to 1997 he worked as a research assistant at the Gesellschaft für Schwerionenforschung in Darmstadt, where he played a key role in further developing recoil ion spectroscopy. After a research period at Kansas State University and a visiting professorship at the University of Missouri in 1995, he received a call to the chair of experimental physics at the University of Freiburg in 1997. With his appointment as a director of the Max Planck Institute for Nuclear Physics (MPIK) in Heidelberg, he headed the department “Experimental Multiparticle Quantum Dynamics" from 2001. Since the beginning of 2012, Joachim Ullrich has been President of the Physikalisch-Technische Bundesanstalt.


Joachim Ullrich has received wide recognition at national and international level for his scientific work, which encompasses approximately 600 publications. Among other honors he has received the Leibniz Prize of the German Research Foundation in 1999. He is active in the committees of many international conferences, scientific advisory boards and supervisory boards. In 2013, Joachim Ullrich became second deputy of the Presidial Board of the German Institute for Standardization e. V. and a member of Germany’s National Academy of Engineering Sciences (acatech). For the Meter Convention, Joachim Ullrich has been a member of the International Committee for Weights and Measures (CIPM), Vice President of the CIPM since 2015 and, since the beginning of 2014, President of the Consultative Committee for the International Units (CCU). As a world-renowned researcher and science manager, Joachim Ullrich received the Federal Cross of Merit 1st Class of the Federal Republic of Germany in 2017.

Facts, background information, dossiers

  • recoil ion spectroscopy
  • experimental physics
  • quantum dynamics

Other articles by this author

All articles

Natural constants take center stage

The 20th of May 2019 is a special day. From that day on, the old definitions of what a kilogram, a mole, an ampere and a kelvin represent, are history. The future of the International (…)

More about Physikalisch-Technische Bundesanstalt

  • News

    Don't Give the Slightest Chance to Toxic Elements in Medicinal Products

    Lead, cadmium, mercury, and arsenic do not belong in medicinal products. International requirements for the quality of medicines have therefore become more stringent and introduced new control requirements. Hence, it makes sense to use high-accuracy reference solutions with defined contents ... more

    Measurement of the dynamic mechanical properties of viscous materials

    In microsystems metallic components are increasingly being replaced by those from low-cost polymers. For the thickness measurement of polymers, there is now the DIN standard 32567 available, which describes both, optical and tactile surface measuring methods for the precise measurement of t ... more

    The most accurate optical single-ion clock worldwide

    Atomic clock experts from the Physikalisch-Technische Bundesanstalt (PTB) are the first research group in the world to have built an optical single-ion clock which attains an accuracy which had only been predicted theoretically so far. As early as 1981, Hans Dehmelt, who was to be awarded a ... more

  • q&more articles

    Natural constants take center stage

    The 20th of May 2019 is a special day. From that day on, the old definitions of what a kilogram, a mole, an ampere and a kelvin represent, are history. The future of the International System of Units will see natural constants play the star roles. more

    How the Avogadro constant was measured for the last time

    Since the 20th of May 2019, the mass unit kilogram is no longer defined by the international kilogram prototype but by the numerical value of the Planck constant, the most important fundamental constant in quantum physics. For this definition, the Planck constant needed to be measured with ... more

    The Best Measurement

    It is now more than 30 years since attempts started to find a way of defining the kilogram based on an atomic constant or a fundamental physical constant. Since then, two methods have advanced sufficiently far to make it likely that there will be a new definition within the coming years, na ... more

  • Authors

    Dr. Jens Simon

    Jens Simon, born in 1962, has followed two academic paths as he moved between Braunschweig, Jülich and Cologne. One path led to a doctorate at the Technical University of Braunschweig in German linguistics on the language of the author Arno Schmidt. The other path led to a doctorate at the ... more

    Dr. Horst Bettin

    Horst Bettin, born in 1955, studied physics at the Technical University of Braunschweig where he completed his PhD at the Institute for Semiconductor Physics and Optics. In 1990 he joined the Physikalisch-Technische Bundesanstalt and focused his research mainly on density measurements. He h ... more

    Dr. Peter Becker

    studied physics at the University of Münster and received his doctorate in 1974 from the Institut für Physik der Universität Dortmund (Dortmund University Institute of Physics). From there he moved to Physikalisch-Technischen Bundesanstalt (National Metrology Institute) in Braunschweig (Bru ... more

q&more – the networking platform for quality excellence in lab and process

The q&more concept is to increase the visibility of recent research and innovative solutions, and support the exchange of knowledge. In the broad spectrum of subjects covered, the focus is on achieving maximum quality in highly innovative sectors. As a modern knowledge platform, q&more offers market participants one-of-a-kind networking opportunities. Cutting-edge research is presented by authors of international repute. Attractively presented in a high-quality context, and published in German and English, the original articles introduce new concepts and highlight unconventional solution strategies.

> more about q&more

q&more is supported by:


Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE