The international collaboration Athena, that involves Genoa, Pavia and Brescia Infn researchers, has yet been able to induce for the first time a chemical reaction between matter and antimatter that produced protonium: it is formed of one hydrogen ion and one anti-hydrogen ion, that is to say a proton and an antiproton. The result has been published today Friday, October 13, by Physical Review Letters.
The Athena experiment, an “antimatter factory” is fitted out at Cern, in Geneva and it produced for the first time in 2002 an antimatter “cloud”, formed of some thousands of anti-hydrogen atoms. The result was published by Nature review. Nevertheless, researchers pointed out a strange structure that appeared in the distribution of annihilation positions of the antimatter. “Athena stopped taking data at the end of 2004, but the analysis of the data gathered up that moment went on and the research published today is one of the result of this activity. It explains exactly that, at that time, “mysterious” structure, says Evandro Lodi Rizzini, who coordinated this analysis and who belongs to Infn associated group of Brescia.
Atoms of anti-hydrogen in Athena were created making come in contact anti-protons and anti-electrons in a high vacuum environment. In these conditions about 10.000-100.000 hydrogen molecules per a cube centimetre remain, versus the many thousands milliard and milliard molecules that would be present in a no vacuum environment. “Probably, exactly these remaining molecules are responsible for the observed phenomenon. We believe in fact that the anti-electrons, which were put in the vacuum room, caused the ionization of some hydrogen molecules, by removing an electron from them. These ionized molecules (H2+) have been then attracted by the antiprotons, which can be considered in this case anti-hydrogen ions. The chemical reaction that produced the protonium derived exactly from this process” goes on Evandro Lodi Rizzini.
Production of protonium was in the past already observed, but in different conditions. This is the first time that this simple and symmetric structure of matter and anti-matter - that looks like a hydrogen atom and an anti-hydrogen one - is produced through a chemical reaction. This result opens a course for the realization of high-efficiency protonium sources. We will be able to study in details fundamental characteristics of this structure, in particular the energy levels, in order to compare them with the theoretical models.
Novel mechanisms of action discovered for the skin cancer medication Imiquimod
21.10.2016 | Technische Universität München
Second research flight into zero gravity
21.10.2016 | Universität Zürich
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences