Almost 100 years ago it was discovered that microscopic matter has wave properties. For
In molecules, the vibration of atomic nuclei is obvious:it can be observed in the internal vibrations of each other's atomic nuclei. Such vibrations are caused by electrons in molecules that create bonds between nuclei, for example, nuclear vibrations occur in every molecular gas under normal conditions.
To very accurately study the vibration characteristics of nuclides, you need an accurate method of change and knowledge of how strong the bond is in a particular molecule.
Unfortunately, it is not yet possible to make accurate theoretical predictions about the bond between molecules. Therefore, it is impossible to accurately investigate vibrations. This can only be done with simple molecules.
The authors dedicated their work to precisely thismolecule, namely the molecular hydrogen ion HD+. It consists of a proton (p) and a deuteron nuclide (d). They are connected to each other by one electron. The relative simplicity of this molecule means that it can be used to make extremely precise theoretical calculations.
Last year, a team led by a professorSchiller developed a new spectroscopic method for studying the rotation of molecular ions. The authors used terahertz radiation with a wavelength of about 0.2 mm.
In a new study, scientists were able to show thatthe same approach works for exciting molecular vibrations. To do this, they had to develop a laser with a special frequency; it is unique in its properties.
Together with the new laser, this method of advancedspectroscopy has 10 thousand times more powerful resolving power than previous methods. Ultimately, it turned out that the prediction of quantum theory regarding the behavior of the atomic nuclei of the proton and deuteron was consistent with experiment with a relative error of three in 100 billion parts.
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