Nitrogen neon isotopes

The anomalous micro-composition of the Martian atmosphere with regard to nitrogen, argon, neon, krypton and xenon has also been compared with trapped gases for the Martian meteorite collection (12 in total). The isotope ratios for... 

In 1967 the scientists of the Joint Institute of Nuclear Research in Dubna, Russia, bombarded americium-243 with neon-22 to produce two isotopes of unnilpentium, then known as hahnium. The reaction is as follows jAm-243 + Ne-22 —> jjjjHahnium-260 and 261 (Unp-260 and 261). In 1970 Albert Ghiorso and his team at Berkeley bombarded califor-nium-249 with heavy nitrogen (N-15) in their Heavy Ion Linear Accelerator (HILAC). The reaction is as follows gCf-249 + -15 —> j jHa-260 (Unp-260). 

Tolstikhin I. N. and Marty B. (1998) The evolution of terrestrial volatiles a view from hehum, neon, argon, and nitrogen isotope modelhng. Chem. Geol. 147, 27-52. 

Fig. 8. Isotopic compositions of nitrogen and neon released from a lunar ilmenite separate subjected to stepwise etching by hydrofluoric acid. Close to grain surfaces, on the right of the plot, isotopically heavy nitrogen is associated with neon whose Ne/ Ne ratio equals that observed directly in the solar wind, whereas at greater depths within the grains, lighter nitrogen is associated with isotopically heavier neon, attributed by Wieler et al (1986) to solar energetic particles. From Mathew et al (1998).

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