Direct AMS operates two different AMS instruments, an NEC Pelletron 500 k V and an Ion Plus MICADAS 250 k V.The differences in design for these two instruments is significant, but the general principle in achieving analysis is the same.These two measures of time will only be the same if all of the assumptions which go into the conventional radiocarbon dating technique are valid.Comparison of ancient, historically dated artifacts (from Egypt, for example) with their radiocarbon dates has revealed that radiocarbon years and calendar years are not the same even for the last 5,000 calendar years.Researchers 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.A new spectroscopic technique offers ultra-sensitive optical detection of radiocarbon dioxide.A beam of C- ions is produced by bombarding the surface of a graphite sample with Cs ions.
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. SCAR offers significant time and cost savings compared to the standard approach for carbon dating and could be useful for a host of other applications such as measuring emissions from fossil fuels or certifying the amount of biogenic content in biofuels. G., The maximum theoretical age obtainable by radiocarbon dating depends on the instrument used to do the analyses.Theoretically, the AMS instrument should obtain ages up to 95,000 years, but practically, 60,000 years or less is the limit. The other factor is what has become known as the "radiocarbon barrier" at around 55,000–60,000 years. The older beta counting instrument was stretched to get results of 50,000 years, whereas the AMS instrument should be effective up to 95,000 years.