One of the most striking predictions of Einstein’s theory of special relativity is probably the best known formula in all science: E = mc2. Today, exactly one hundred years after its first formulation, this equivalence has been verified to be correct at least to an accuracy of 4 parts in 10 000 000 ! These measurements, at the Institut Laue-Langevin, Grenoble, and the Massachussets Institute of Technology (MIT), represent the most precise verification of the relation between mass and energy ever achieved.
The GAMS4 instrument. Copyright ILL / Artechnique
The direct test of Einstein’s equation is based on the prediction that when a nucleus captures a neutron, the resulting isotope (mass number A+1) is somewhat lighter than the sum of the masses of the original nucleus (mass number A) and the free neutron (mass number 1). The energy equivalent to this mass difference is emitted as a spectra of gamma-rays.
The mass difference in Einstein’s equation using two silicon isotopes 28-29Si and two sulphur isotopes 32-33S has been measured with very high accuracy on one side of the Atlantic at the MIT, using a novel experimental technique .
Françoise Vauquois | alfa
Tracing aromatic molecules in the early universe
23.03.2017 | University of California - Riverside
New study maps space dust in 3-D
23.03.2017 | DOE/Lawrence Berkeley National Laboratory
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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