Infrared laser spectroscopy of the ν34 difference band and detection of the ν3 band of NO3

Kentarou Kawaguchi, Jian Tang, Naota Akikusa

Research output: Contribution to journalArticlepeer-review


The infrared diode laser spectrum of the ν34 difference band of 14NO3 has been observed in the 690 cm−1 region. By fixing the lower state (v4 = 1) constants to the previously determined values, molecular constants in v3 = 1 have been determined for the first time: the vibrational energy E3 = 1054.13679(69) cm−1, the rotational constants B3 = 0.4562291(41), C3 = 0.2274567(53) cm−1, the first-order Coriolis coupling constant Cζ3 = 0.0032073(99) cm−1, and the spin–orbit interaction constant aeff = –0.03979(70) cm−1, with one standard deviation in parentheses. The ν3 fundamental band has been detected with weaker intensity than the ν3 + ν4 band by a factor of ~ 2000.

Original languageEnglish
Article number138315
JournalChemical Physics Letters
Publication statusPublished - Feb 16 2021


  • Coriolis interaction constant
  • IR spectroscopy
  • Nitrate radical
  • Vibronic interaction
  • ν-ν and ν bands

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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