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

New high-accuracy reference solutions for the SI-traceable measurement

27-Mar-2018

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 of ...

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Measurement of the dynamic mechanical properties of viscous materials

DIN standard for the determination of the tip radius and the probing force of stylus instruments developed

07-Jun-2016

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 the ...

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The most accurate optical single-ion clock worldwide

12-Feb-2016

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 Nobel ...

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A deep look into a single molecule

10-Feb-2016

A German research group has demonstrated the first implementation of a non-destructive state detection technique for molecular ions. Piet Schmidt and his colleagues from the QUEST-Institute at the Physikalisch-Technische Bundesanstalt (PTB) observed changes in the rotational state of a trapped ...

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Ultrastable materials investigated in depth

Measuring Thermal expansion at low temperatures for future space missions

25-Nov-2015

Space holds numerous fascinating objects which we can only investigate by observing their radiation - even beyond the visible range. For space telescopes such as the European Space Agency's (ESA) infrared observatory Herschel, whose mission is to observe radiation in the far-infrared, cooling the ...

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The fundamental constants are still constant

Atomic clocks prove the stability of the mass ratio of protons to electrons

20-Nov-2014

Are the fundamental constants really constant? Recent investigations carried out at the Physikalisch-Technische Bundesanstalt (PTB) have shown that one essential fundamental constant - namely the mass ratio of protons to electrons - can have changed only by a maximum of one part in a million over ...

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Photon recoil provides new insight into matter

QUEST researchers have demonstrated: New method of precision spectroscopy allows unprecedented accuracy

03-Feb-2014

Quantum logic spectroscopy – which is closely linked with the name of the 2012 Nobel prize laureate, David J. Wineland – has been significantly extended: this new method is called "photon-recoil spectroscopy" (PRS). The potential of this method has been demonstrated by the research group led by ...

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Cosmology in the lab using laser-cooled ions

Taking a look back at the beginning of our universe: QUEST researchers at PTB generate and investigate symmetry breaking in ion Coulomb crystals

15-Aug-2013

Scientists would love to know which forces created our universe some 14 billion years ago. How could – due to a breaking of symmetry – matter, and thus stars and galaxies, be created from an originally symmetrical universe in which the same conditions prevailed everywhere shortly after the Big ...

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A big step towards the redefinition of the kelvin

PTB scientists determine a new value of the Boltzmann constant

28-Sep-2011

Metrologists are measurement artists who are very precise – in the case of the Boltzmann constant up to the sixth decimal place. Whoever is able to determine it very exactly will cause a small revolution in the field of worldwide temperature measurement: The temperature unit will then no longer ...

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Accurate measurement of radioactive thoron possible at last

PTB develops first primary standard worldwide for calibration of thoron measuring instruments

09-Mar-2011

"Many people are now saying: 'Is it really that easy? Then why didn't anyone think of it a long time ago?' But you have to have the right idea at the right time," says Annette Röttger, physicist at the Physikalisch-Technische Bundesanstalt (PTB), in a pleased way. Annette Röttger and her ...

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