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2011-present

  1. Chao, W.; Jones, G. H.; Okumura, M.; Percival, C. J.; Winiberg, F. A. F. A-Band Absorption Spectrum of the ClSO Radical: Electronic Structure of the Sulfinyl Group. J. Phys. Chem. A 2023, 127 (40), 8374–8382. https://doi.org/10.1021/acs.jpca.3c04977

  2. Zuraski, K.; Grieman, F. J.; Hui, A. O.; Cowen, J.; Winiberg, F. A. F.; Percival, C. J.; Okumura, M.; Sander, S. P. Acetonyl Peroxy and Hydroperoxy Self- and Cross-Reactions: Temperature-Dependent Kinetic Parameters, Branching Fractions, and Chaperone Effects. J. Phys. Chem. A 2023, 127 (37), 7772–7792. https://doi.org/10.1021/acs.jpca.3c03660

  3. Rösch, D.; Jones, G. H.; Almeida, R.; Caravan, R. L.; Hui, A.; Ray, A. W.; Percival, C. J.; Sander, S. P.; Smarte, M. D.; Winiberg, F. A. F.; Okumura, M.; Osborn, D. L. Conformer-Dependent Chemistry: Experimental Product Branching of the Vinyl Alcohol + OH + O2 Reaction. J. Phys. Chem. A 2023, 127 (14), 3221–3230. https://doi.org/10.1021/acs.jpca.3c00356

  4. Chao, W.; Jones, G. H.; Okumura, M.; Percival, C. J.; Winiberg, F. A. F. Spectroscopic and Kinetic Studies of the ClSO Radical from Cl2SO Photolysis. Journal of the American Chemical Society 2022, 144 (44), 20323–20331. https://doi.org/10.1021/jacs.2c07912

  5. Mertens, L. A.; Winiberg, F. A. F.; Allen, H. M.; Sander, S. P.; Okumura, M. Yields of HONO2 and HOONO Products from the Reaction of HO2 and NO Using Pulsed Laser Photolysis and Mid-Infrared Cavity-Ringdown Spectroscopy. The Journal of Physical Chemistry A 2022, 126 (40), 7342–7360. https://doi.org/10.1021/acs.jpca.2c04643

  6. Zhang, X.; Berkinsky, D.; Markus, C. R.; Chitturi, S. R.; Grieman, F. J.; Okumura, M.; Luo, Y.; Yung, Y. L.; Sander, S. P. Reaction of Methane and UV-Activated Perchlorate: Relevance to Heterogeneous Loss of Methane in the Atmosphere of Mars. Icarus 2022, 376, 114832. https://doi.org/10.1016/j.icarus.2021.114832

  7. Sterczewski, L. A.; Chen, T.-L.; Ober, D. C.; Markus, C. R.; Canedy, C. L.; Vurgaftman, I.; Frez, C.; Meyer, J. R.; Okumura, M.; Bagheri, M. Cavity-Enhanced Vernier Spectroscopy with a Chip-Scale Mid-Infrared Frequency Comb. ACS Photonics 2022, 9 (3), 994–1001. https://doi.org/10.1021/acsphotonics.1c01849

  8. Chen, T.-L.; Ober, D. C.; Miri, R.; Bui, T. Q.; Shen, L.; Okumura, M. Optically Switched Dual-Wavelength Cavity Ring-Down Spectrometer for High-Precision Isotope Ratio Measurements of Methane δD in the Near Infrared. Analytical Chemistry 2021, 93 (16). https://doi.org/10.1021/acs.analchem.0c05090

  9. Durif, O.; Capron, M.; Messinger, J. P.; Benidar, A.; Biennier, L.; Bourgalais, J.; Canosa, A.; Courbe, J.; Garcia, G. A.; Gil, J. F.; Nahon, L.; Okumura, M.; Rutkowski, L.; Sims, I. R.; Thiévin, J.; Le Picard, S. D. A New Instrument for Kinetics and Branching Ratio Studies of Gas Phase Collisional Processes at Very Low Temperatures. Review of Scientific Instruments 2021, 92 (1). https://doi.org/10.1063/5.0029991

  10. Zuraski, K.; Hui, A. O.; Grieman, F. J.; Darby, E.; Møller, K. H.; Winiberg, F. A. F.; Percival, C. J.; Smarte, M. D.; Okumura, M.; Kjaergaard, H. G.; Sander, S. P. Acetonyl Peroxy and Hydro Peroxy Self- and Cross-Reactions: Kinetics, Mechanism, and Chaperone Enhancement from the Perspective of the Hydroxyl Radical Product. The Journal of Physical Chemistry A 2020, 124 (40). https://doi.org/10.1021/acs.jpca.0c06220

  11. Messinger, J. P.; Gupta, D.; Cooke, I. R.; Okumura, M.; Sims, I. R. Rate Constants of the CN + Toluene Reaction from 15 to 294 K and Interstellar Implications. The Journal of Physical Chemistry A 2020, 124 (39). https://doi.org/10.1021/acs.jpca.0c06900

  12. Hui, A. O.; Okumura, M.; Sander, S. P. Temperature Dependence of the Reaction of Chlorine Atoms with CH 3 OH and CH 3 CHO. The Journal of Physical Chemistry A 2019, 123 (23). https://doi.org/10.1021/acs.jpca.9b00038

  13. Hui, A. O.; Fradet, M.; Okumura, M.; Sander, S. P. Temperature Dependence Study of the Kinetics and Product Yields of the HO 2 + CH 3 C(O)O 2 Reaction by Direct Detection of OH and HO 2 Radicals Using 2f-IR Wavelength Modulation Spectroscopy. The Journal of Physical Chemistry A 2019, 123 (17). https://doi.org/10.1021/acs.jpca.9b00442

  14. Zangmeister, C. D.; You, R.; Lunny, E. M.; Jacobson, A. E.; Okumura, M.; Zachariah, M. R.; Radney, J. G. Measured In-Situ Mass Absorption Spectra for Nine Forms of Highly-Absorbing Carbonaceous Aerosol. Carbon 2018, 136. https://doi.org/10.1016/j.carbon.2018.04.057

  15. Yung, Y. L.; Chen, P.; Nealson, K.; Atreya, S.; Beckett, P.; Blank, J. G.; Ehlmann, B.; Eiler, J.; Etiope, G.; Ferry, J. G.; Forget, F.; Gao, P.; Hu, R.; Kleinböhl, A.; Klusman, R.; Lefèvre, F.; Miller, C.; Mischna, M.; Mumma, M.; Newman, S.; Oehler, D.; Okumura, M.; Oremland, R.; Orphan, V.; Popa, R.; Russell, M.; Shen, L.; Sherwood Lollar, B.; Staehle, R.; Stamenković, V.; Stolper, D.; Templeton, A.; Vandaele, A. C.; Viscardy, S.; Webster, C. R.; Wennberg, P. O.; Wong, M. L.; Worden, J. Methane on Mars and Habitability: Challenges and Responses. Astrobiology 2018, 18 (10). https://doi.org/10.1089/ast.2018.1917

  16. Dodson, L. G.; Savee, J. D.; Gozem, S.; Shen, L.; Krylov, A. I.; Taatjes, C. A.; Osborn, D. L.; Okumura, M. Vacuum Ultraviolet Photoionization Cross Section of the Hydroxyl Radical. The Journal of Chemical Physics 2018, 148 (18). https://doi.org/10.1063/1.5024249

  17. Bui, T. Q.; Bjork, B. J.; Changala, P. B.; Nguyen, T. L.; Stanton, J. F.; Okumura, M.; Ye, J. Direct Measurements of DOCO Isomers in the Kinetics of OD + CO. Science Advances 2018, 4 (1). https://doi.org/10.1126/sciadv.aao4777

  18. Bjork, B. J.; Bui, T. Q.; Heckl, O. H.; Changala, P. B.; Spaun, B.; Heu, P.; Follman, D.; Deutsch, C.; Cole, G. D.; Aspelmeyer, M.; Okumura, M.; Ye, J. Direct Frequency Comb Measurement of OD + CO -> DOCO Kinetics. Science 2016, 354 (6311). https://doi.org/10.1126/science.aag1862

  19. Dodson, L. G.; Shen, L.; Savee, J. D.; Eddingsaas, N. C.; Welz, O.; Taatjes, C. A.; Osborn, D. L.; Sander, S. P.; Okumura, M. VUV Photoionization Cross Sections of HO 2 , H 2 O 2 , and H 2 CO. The Journal of Physical Chemistry A 2015, 119 (8). https://doi.org/10.1021/jp508942a

  20. Bui, T. Q.; Long, D. A.; Cygan, A.; Sironneau, V. T.; Hogan, D. W.; Rupasinghe, P. M.; Ciuryło, R.; Lisak, D.; Okumura, M. Observations of Dicke Narrowing and Speed Dependence in Air-Broadened CO 2 Lineshapes near 2.06  μ m. The Journal of Chemical Physics 2014, 141 (17). https://doi.org/10.1063/1.4900502

  21. Morajkar, P.; Schoemaecker, C.; Okumura, M.; Fittschen, C. Direct Measurement of the Equilibrium Constants of the Reaction of Formaldehyde and Acetaldehyde with HO 2 Radicals. International Journal of Chemical Kinetics 2014, 46 (5). https://doi.org/10.1002/kin.20817

  22. Fleisher, A. J.; Bjork, B. J.; Bui, T. Q.; Cossel, K. C.; Okumura, M.; Ye, J. Mid-Infrared Time-Resolved Frequency Comb Spectroscopy of Transient Free Radicals. The Journal of Physical Chemistry Letters 2014, 5 (13). https://doi.org/10.1021/jz5008559

  23. Sprague, M. K.; Mertens, L. A.; Widgren, H. N.; Okumura, M.; Sander, S. P.; McCoy, A. B. Cavity Ringdown Spectroscopy of the Hydroxy-Methyl-Peroxy Radical. The Journal of Physical Chemistry A 2013, 117 (39). https://doi.org/10.1021/jp400390y

  24. Takematsu, K.; Eddingsaas, N. C.; Robichaud, D. J.; Okumura, M. Spectroscopic Studies of the Jahn-Teller Effect in the Ã2E″ State of the Nitrate Radical NO3. Chemical Physics Letters 2013, 555. https://doi.org/10.1016/j.cplett.2012.10.088

  25. Sprague, M. K.; Garland, E. R.; Mollner, A. K.; Bloss, C.; Bean, B. D.; Weichman, M. L.; Mertens, L. A.; Okumura, M.; Sander, S. P. Kinetics of n -Butoxy and 2-Pentoxy Isomerization and Detection of Primary Products by Infrared Cavity Ringdown Spectroscopy. The Journal of Physical Chemistry A 2012, 116 (24). https://doi.org/10.1021/jp212136r

  26. Yeung, L. Y.; Okumura, M.; Zhang, J.; Minton, T. K.; Paci, J. T.; Karton, A.; Martin, J. M. L.; Camden, J. P.; Schatz, G. C. O( 3 P ) + CO 2 Collisions at Hyperthermal Energies: Dynamics of Nonreactive Scattering, Oxygen Isotope Exchange, and Oxygen-Atom Abstraction. The Journal of Physical Chemistry A 2012, 116 (1). https://doi.org/10.1021/jp2080379

  27. Long, D. A.; Cygan, A.; van Zee, R. D.; Okumura, M.; Miller, C. E.; Lisak, D.; Hodges, J. T. Frequency-Stabilized Cavity Ring-down Spectroscopy. Chemical Physics Letters 2012, 536. https://doi.org/10.1016/j.cplett.2012.03.035

  28. Long, D. A.; Havey, D. K.; Yu, S. S.; Okumura, M.; Miller, C. E.; Hodges, J. T. O2 A-Band Line Parameters to Support Atmospheric Remote Sensing. Part II: The Rare Isotopologues. Journal of Quantitative Spectroscopy and Radiative Transfer 2011, 112 (16). https://doi.org/10.1016/j.jqsrt.2011.07.002

  29. Long, D. A.; Bielska, K.; Lisak, D.; Havey, D. K.; Okumura, M.; Miller, C. E.; Hodges, J. T. The Air-Broadened, near-Infrared CO 2 Line Shape in the Spectrally Isolated Regime: Evidence of Simultaneous Dicke Narrowing and Speed Dependence. The Journal of Chemical Physics 2011, 135 (6). https://doi.org/10.1063/1.3624527

  30. Long, D. A.; Okumura, M.; Miller, C. E.; Hodges, J. T. Frequency-Stabilized Cavity Ring-down Spectroscopy Measurements of Carbon Dioxide Isotopic Ratios. Applied Physics B 2011, 105 (2). https://doi.org/10.1007/s00340-011-4518-z

prior to 2011

  1. Mollner, A.K., S. Valluvadasan, L. Feng, M.K. Sprague, M. Okumura, D.B. Milligan, W.J. Bloss, S.P. Sander, P.T. Martien, R.A. Harley, A.B. McCoy, and W.P.L. Carter, "Rate of Gas Phase Association of Hydroxyl Radical and Nitrogen Dioxide," Science 330 (2010): 646-649. https://doi.org/10.1126/science.1193030

  2. Noell, A.C., L.S. Alconcel, D.J. Robichaud, M. Okumura, and S. P. Sander. "Near-Infrared Kinetic Spectroscopy of the HO2 and C2H5O2 Self-Reactions and Cross Reactions," J. Phys. Chem. A 114 (2010): 6983-6995. https://doi.org/10.1021/jp912129j

  3. Long, D.A., D.K. Havey, M. Okumura, C.E. Miller, and J.T. Hodges "O2 A-Band Line Parameters to Support Atmospheric Remote Sensing," J. Quant. Spectrosc. Radiat. Transfer 111 (2010) 2021-2036. https://doi.org/10.1016/j.jqsrt.2010.05.011

  4. Long, D.A., D.K. Havey, M. Okumura, C.E. Miller, and J.T. Hodges "Cavity ring-down spectroscopy measurements of sub-Doppler hyperfine structure," Phys. Rev. A 81 (2010): 064502. https://doi.org/10.1103/PhysRevA.81.064502 

  5. Wild, D.A., K.T. Kuwata, C.K. Wong, J.D. Lobo, A. Deev, T.S. Schindler, M. Okumura, and E.J. Bieske, "Infrared spectra of mass-selected Br--(NH3)n and I--NH3 clusters," J. Phys. Chem. A 114 (2010): 4762-4769. https://doi.org/10.1021/jp909237n

  6. McCoy, A.B., M.K. Sprague, and M. Okumura, "The role of torsion/torsion coupling in the vibrational spectrum of cis-cis HOONO," J. Phys. Chem. A 114 (2010): 1324-1333. https://doi.org/10.1021/jp905731h

  7. Robichaud, D.J., L.Y. Yeung, D.A. Long, M. Okumura, D.K. Havey, J.T. Hodges, C.E. Miller, and L.R. Brown, "Experimental line parameters of the b1Σg+ ← X3Σg- band of oxygen isotopologues at 760 nm using Frequency-Stabilized Cavity Ring-Down Spectroscopy," J. Phys. Chem. A 113 (2009): 13089-13099. https://doi.org/10.1021/jp901127h

  8. Havey, D.K., D.A. Long, M. Okumura, C.E. Miller, and J.T. Hodges,"Ultra-Sensitive Optical Measurements of High-J Transitions in the O2 A-band," Chem. Phys. Lett. 483 (2009): 49-54. https://doi.org/10.1016/j.cplett.2009.10.067

  9. Long, D.A., D.K. Havey, M. Okumura, H.M. Pickett, C.E. Miller, and J.T. Hodges, "Laboratory measurements and theoretical calculations of O2 A-band electric quadrupole transitions," Phys. Rev. A.80 (2009): 042513. https://doi.org/10.1103/PhysRevA.80.042513 

  10. Yeung, L.Y., M. Okumura, J.T. Paci, G.C. Schatz, J. Zhang, and T.K. Minton, "Hyperthermal O-Atom Exchange Reaction O2 + CO2 through a CO4 Intermediate," J. Am. Chem. Soc. 131 (2009): 13940-13942. https://doi.org/10.1021/ja903944k

  11. Huntington, K.W., J.M. Eiler, H.P. Affek, W. Guo, M. Bonafacie, L.Y. Yeung, N. Thiagarajan, B. Passey, A. Tripati, M. Daëron, R. Came, "Methods and limitations of ‘clumped' CO2 isotope (&Delta47) analysis by gas source isotope ratio mass spectrometry," J. Mass Spectrom. 44 (2009): 1318-1329.  https://doi.org/10.1002/jms.1614

  12. Yeung, L.Y., H.P. Affek, K.J. Hoag, W. Guo, A.A. Wiegel, E.L. Atlas, S.M. Schauffler, M. Okumura, K.A. Boering, and J.M. Eiler, "Large and unexpected enrichment in stratospheric 16O13C18O and its meridional variation," Proc. Natl. Acad. Sci. USA 106 (2009): 11496-11501. https://doi.org/10.1073/pnas.0902930106

  13. Stanton, J.F. and M. Okumura, "On the vibronic level structure in the NO3 radical: Part III. Observation of intensity borrowing via ground state mixing," Phys. Chem. Chem. Phys. 11 (2009): 4742-4744. https://doi.org/10.1039/B902252J

  14. Spencer, K.M., D.C. McCabe, J.D. Crounse, J.R. Olson, J.H. Crawford, A.J. Weinheimer, D.J. Knapp, D.D. Montzka, C.A. Cantrell, R.S. Anderson, R.L. Mauldin III, and P.O. Wennberg, "Inferring ozone production in an urban atmosphere using measurements of peroxynitric acid," Atmos. Chem. Phys. 9 (2009): 3697-3707. https://doi.org/10.5194/acp-9-3697-2009

  15. Robichaud, D.J., J.T. Hodges, P. Maslowski, L.Y. Yeung, M. Okumura, C.E. Miller, and L.R. Brown, "High-Accuracy Transition Frequencies for the O2 A-Band," J. Mol. Spec. 251 (2008): 27-37. https://doi.org/10.1016/j.jms.2007.12.008

  16. Robichaud, D.J., J.T. Hodges, L.R. Brown, D. Lisak, P. Maslowski, L.Y. Yeung, M. Okumura, and C. E. Miller, "Experimental intensity and line shape parameters of the oxygen A-band using frequency-stabilized cavity ring-down spectroscopy," J. Mol. Spec. 248 (2008): 1-13.

  17. Robichaud, D.J., J.T. Hodges, D. Lisak, C.E. Miller, and M. Okumura. "High-precision pressure shifting measurement technique using frequency-stabilized cavity ring-down spectroscopy," J. Quant. Spectro. Rad. Transfer 109 (2008): 435-444.