 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
| . |  |
. |
 by Staff Writers Frankfurt, Germany (SPX) Sep 25, 2022
Frank Brenker and his team are world leaders in a method that makes it possible to analyse the chemical composition of material in a three-dimensional and entirely non-destructive way and without complicated sample preparation - yet with a resolution of under 100 nanometres. Resolution expresses the smallest perceptible difference between two measured values. The method's long name is "Synchrotron Radiation induced X-Ray Fluorescence Computed Tomography", in short SR-XRF-CT. Japan had chosen Ryugu (English: Dragon's Palace) as the probe's destination because it is an asteroid which, due to its high carbon content, promised to deliver particularly extensive information about the origin of life in our solar system. The analyses conducted on 16 particles by the researchers together with the scientists in Frankfurt have now shown that Ryugu is composed of CI-type material. These are very similar to the Sun in terms of their chemical composition. So far, CI-material has only rarely been found on Earth - material of which it was unclear how much it had been altered or contaminated when entering Earth's atmosphere or upon impact with our planet. Furthermore, the analysis confirms the assumption that Ryugu originated from a parent asteroid which formed in the outer solar nebula. Until now, scientists had assumed that there was hardly any transport of material within the asteroid due to the low temperatures during the formation of the CI material in the early days of the solar system and therefore scarcely any possibility for a massive accumulation of elements. By means of SR-XRF-CT, however, the researchers in Frankfurt found a fine vein of magnetite - an iron oxide mineral - and hydroxyapatite, a phosphate mineral, in one of the grains of the asteroid. Other groups of scientists established that the structure and other magnetite-hydroxyapatite regions in the Ryugu samples must have formed at a surprisingly low temperature of under 40 C. This finding is fundamental for interpreting almost all the results that the analysis of the Ryugu samples has generated and will generate in future. In areas of the samples containing hydroxyapatite, Frank Brenker's team additionally detected rare earth metals - a group of chemical elements indispensable today for alloys and glassware for high-tech applications, among others. "The rare earths occur in the hydroxyapatite of the asteroid in concentrations 100 times higher than elsewhere in the solar system," says Brenker. What's more, he says, all the elements of the rare earth metals have accumulated in the phosphate mineral to the same degree - which is also unusual. Brenker is convinced: "This equal distribution of rare earths is a further indication that Ryugu is a very pristine asteroid that represents the beginnings of our solar system." It is by no means a matter of course that researchers from Goethe University Frankfurt were allowed to examine samples from the Hayabusa 2 mission: after all, Japan undertook this space mission alone and, according to information from 2010, raised euro 123 million for it. It therefore also wants to reap a large part of the scientific harvest. But ultimately Japan did not want to forego the expertise of the German SR-XRF-CT specialists.
Research Report:Formation and evolution of Cb-type asteroid Ryugu: Direct evidence from returned samples
Beams of muons used to analyze the elemental composition of Asteroid Ryugu samples Tokyo, Japan (SPX) Sep 25, 2022 Stone samples brought back to Earth from asteroid Ryugu have had their elemental composition analyzed using an artificially generated muon beam from the particle accelerator in J-PARC. Researchers found a number of important elements needed to sustain life, including carbon, nitrogen, and oxygen, but also found the oxygen abundance relative to silicon in asteroid Ryugu was different from all meteorites that have been found on Earth, reports a new study in Science. In 2014, the unmanned asteroid ex ... read more
|
|||||||||||||
|
|
| The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us. |
del.icio.us
Digg
Reddit
Google
