This disclosure provides systems, methods, and apparatus related to performing isotopic analysis of a sample. In one aspect a method includes applying laser energy to a region of a sample with a laser to generate a plasma and recording a spectrum generated by a plurality of molecular species in the plasma with a device.
STATEMENT OF GOVERNMENT SUPPORT
 This invention was made with government support under Contract No. DE-AC02-05CH11231 awarded by the U.S. Department of Energy, under federal Work for Others Awards No. LB09005541 and LB09005541A with the U.S. Department of Defense DTRA (Defense Threat Reduction Agency) under Interagency Cost Reimbursement Orders No. 094711I and 104134I, and under NASA Contract No. NNX10CA07C awarded to Applied Spectra, Inc. The government has certain rights in this invention.