Thanks BenLurkin.
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Lawrence knew of a 1962 paper, however, that suggested neutron spectroscopy could help determine Venus' atmospheric nitrogen concentration. Nitrogen is fairly good at scavenging loose neutrons, unlike carbon and oxygen, which are some of the worst. So on Venus, the number of neutrons an instrument detects should depend on the amount of atmospheric nitrogen. Nitrogen concentration through Venus' atmosphere. New analysis of MESSENGER data shows an uptick in nitrogen concentration around Venus' upper cloud deck roughly 30 miles (50 kilometers) up, upending a long-held idea that nitrogen is distributed equally throughout. The red line is a trend line fitted to data from multiple missions, including MESSENGER's data, which was collected between 35 and 65 miles (60 and 100 km) high. Credit: Johns Hopkins APL... When they compared their models with the MESSENGER data, they found the best match was when atmospheric nitrogen made up 5% of the volume, about 1.5 times that measured lower in the atmosphere. And all of the neutrons came from a region between roughly 35 and 60 miles above the surface -- exactly where there had been the greatest uncertainty.
The Immanuel Velikovsky and Velikovsky keywords, sorted, duplicates out:
