ABSTRACT

Isotopically anomalous nitrogen and carbon found in the carbonaceous chondrites Allende and Murchison can be attributed to the x-process nucleosynthesis, which produced, aside from the light elements D, Li, Be and B, appreciable quantities of ¹²C, ¹³C, ¹⁴N, ¹⁵N, ¹⁶O, ¹⁷O, ¹⁸O and so on during an intermediate stage in the early history of the solar system.