Radioactive dating using a mass spectrometer wale and chrisette michele dating
One of their next steps is to conduct SCAR analyses of samples that are significant to various fields, such as archaeological artifacts and biofuels, and directly compare these measurements with accelerator mass spectrometry results from the same samples. To determine the age of a sample, the SCAR technique uses a highly stable infrared laser to excite carbon dioxide molecules in a mirrored cavity.WASHINGTON — Researchers from Istituto Nazionale di Ottica (INO), within Consiglio Nazionale delle Ricerche (CNR), Italy have demonstrated a new compact spectroscopic instrument that offers a highly sensitive optical method for detecting radiocarbon dioxide concentration, which can be used to carbon date fossils and archaeological artifacts.The instrument, which uses a new approach called saturated-absorption cavity ring-down (SCAR), is described in The Optical Society's journal for high impact research, .“SCAR instruments could be installed at local facilities across a region to take measurements in different places at the same time, to determine the most important pollution sites,” said Davide Mazzotti, a member of the research team.An initiative supporting carbon pricing was recently announced in December 2015 at the United Nations Conference on Climate Change, suggesting the demand for accurate local pollution-tracking technology could increase in the future.Accelerator mass spectrometry measures the amount of carbon-14, or radiocarbon, present in a sample, which can be used to calculate its age.
“We developed a very general spectroscopic technique and showed that it can be used to detect radiocarbon dioxide,” said Giovanni Giusfredi, a member of the research team.
“This could revolutionize the approach that archaeologists use for carbon dating because they would not have to send sensitive samples away to a lab and wait weeks for a result.” Improving the environment The researcher team is also exploring several applications tied to the environment.
For example, radiocarbon dioxide concentration measurements can be used to distinguish carbon dioxide created by burning fossil fuels from other sources of carbon dioxide in the atmosphere.
The length of time it takes for the light to decay from its initial intensity is used to calculate the concentration of radiocarbon in the gas mixture in the cavity.
The highly reflective mirrors create an effective path longer than 5 kilometers for interactions between the light and the gas sample.