PMID- 31153211 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20191120 IS - 1089-7690 (Electronic) IS - 0021-9606 (Linking) VI - 150 IP - 20 DP - 2019 May 28 TI - Automated, context-free assignment of asymmetric rotor microwave spectra. PG - 204122 LID - 10.1063/1.5085794 [doi] AB - We present a new algorithm, Robust Automated Assignment of Rigid Rotors (RAARR), for assigning rotational spectra of asymmetric tops. The RAARR algorithm can automatically assign experimental spectra under a broad range of conditions, including spectra comprised of multiple mixture components, in less, similar100 s. The RAARR algorithm exploits constraints placed by the conservation of energy to find sets of connected lines in an unassigned spectrum. The highly constrained structure of these sets eliminates all but a handful of plausible assignments for a given set, greatly reducing the number of potential assignments that must be evaluated. We successfully apply our algorithm to automatically assign 15 experimental spectra, including 5 previously unassigned species, without prior estimation of molecular rotational constants. In 9 of the 15 cases, the RAARR algorithm successfully assigns two or more mixture components. FAU - Yeh, Lia AU - Yeh L AUID- ORCID: 0000000327044057 AD - Department of Physics, University of California, Santa Barbara, California 93106, USA. FAU - Satterthwaite, Lincoln AU - Satterthwaite L AD - Department of Physics, University of California, Santa Barbara, California 93106, USA. FAU - Patterson, David AU - Patterson D AUID- ORCID: 0000000310257515 AD - Department of Physics, University of California, Santa Barbara, California 93106, USA. LA - eng PT - Journal Article PL - United States TA - J Chem Phys JT - The Journal of chemical physics JID - 0375360 EDAT- 2019/06/04 06:00 MHDA- 2019/06/04 06:01 CRDT- 2019/06/03 06:00 PHST- 2019/06/03 06:00 [entrez] PHST- 2019/06/04 06:00 [pubmed] PHST- 2019/06/04 06:01 [medline] AID - 10.1063/1.5085794 [doi] PST - ppublish SO - J Chem Phys. 2019 May 28;150(20):204122. doi: 10.1063/1.5085794.