Gregory Hall

Brookhaven National Laboratory

Chemistry Division
Bldg. 555
P.O. Box 5000
Upton, NY 11973-5000

(631) 344-4376
greghall@bnl.gov

Research | Education | Appointments | Publications

Research Activities

Research Interests

Chemical Physics: Molecular dynamics, spectroscopy, photochemistry and kinetics. Applications of high resolution spectroscopy to molecular dynamics; Doppler spectroscopy for the measurement of product correlations in bimolecular and unimolecular reactions. Statistical and dynamical models of vector correlations; experimental tests of unimolecular rate theory. Multiple surface reactions; coherent effects in multiple path reactions; measurement and interpretation of photofragment orientation. Collision-induced electronic transitions. Double-resonance spectroscopy for collision studies of energy and polarization transfer.

Education

A.B. in Chemistry, Cornell University, 1974
M.Sc. in Physical Chemistry, University of Toronto, 1976
Ph.D. in Physical Chemistry, University of Toronto, 1980

Professional Appointments

Cornell University 1980-1987

• Manager, Facility for Laser Spectroscopy; Research Associate
• Senior Research Asssociate

Brookhaven National Laboratory 1987-present

• Assistant chemist, Associate Chemist, Chemist, Senior Chemist
• Senior Chemist, Emeritus   7/2018-present

Fellowships and Visiting Appointments

Max-Planck Institut für Strömungsforschung, Göttingen, summer 1986
Physical Chemistry Institute, University of Zürich, 9/1996-8/1997
Fellow of the American Physical Society, 2009
School of Chemistry, University of New South Wales, Sydney, 2/2015-4/2015
School of Chemical and Physical Sciences, Flinders University, Adelaide, 5/2015-7/2015
School of Molecular Sciences, Arizona State University 1/2019, 2/2020
Chemistry Department, University of Missouri, 3/2019-5/2019

Selected Publications

• Gunthardt CE, Aardema MN, Hall GE, North SW (2019) Evidence for lambda doublet propensity in the UV photodissociation of ozone. The Journal of Chemical Physics 151:224302. doi: 10.1063/1.5131504
• Lockhart JPA, Gross EC, Sears TJ, Hall GE (2019) Kinetic study of the OH + ethylene reaction using frequency-modulated laser absorption spectroscopy. International Journal of Chemical Kinetics 51:412–421. doi: 10.1002/kin.21265
• Gunthardt CE, Wallace CJ, Hall GE, Field RW, North SW (2019) Anomalous Intensities in the 2+1 REMPI Spectrum of the E 1Π–X 1Σ+ Transition of CO. The Journal of Physical Chemistry A 123:2780–2788. doi: 10.1021/acs.jpca.9b00109
• Lockhart JPA, Gross EC, Sears TJ, Hall GE (2018) Investigating the photodissociation of H2O2 using frequency modulation laser absorption spectroscopy to monitor radical products. Chemical Physics Letters 711:148–151. doi: 10.1016/j.cplett.2018.09.004
• Le AT, Gross EC, Hall GE, Sears TJ (2018) Analysis of the A∼-X∼ bands of the ethynyl radical near 1.48 μm and re-evaluation of X∼ state energies. Journal of Molecular Spectroscopy 349:64–70. doi: 10.1016/j.jms.2018.04.006
• Twagirayezu S, Hall GE, Sears TJ (2016) Quadrupole splittings in the near-infrared spectrum of 14NH3. The Journal of Chemical Physics 145:144302. doi: 10.1063/1.4964484
• Goncharov VV, Hall GE (2016) Supercontinuum Fourier transform spectrometry with balanced detection on a single photodiode. The Journal of Chemical Physics 145:084201. doi: 10.1063/1.4961655
• Le AT, Hall GE, Sears TJ (2016) The near-infrared spectrum of ethynyl radical. The Journal of Chemical Physics 145:074306. doi: 10.1063/1.4961019
• Holmes-Ross HL, Valenti RJ, Yu H-G, Hall GE, Lawrance WD (2016) Rotational and angular distributions of NO products from NO-Rg (Rg = He, Ne, Ar) complex photodissociation. The Journal of Chemical Physics 144:044309. doi: 10.1063/1.4940690
• Forthomme D, Cich MJ, Twagirayezu S, Hall GE, Sears TJ (2015) Application of the Hartmann–Tran profile to precise experimental data sets of 12C2H2. Journal of Quantitative Spectroscopy and Radiative Transfer 165:28–37. doi: 10.1016/j.jqsrt.2015.06.013
• Twagirayezu S, Cich MJ, Sears TJ, McRaven CP, Hall GE (2015) Frequency-comb referenced spectroscopy of v4- and v5-excited hot bands in the 1.5 μm spectrum of C2H2. Journal of Molecular Spectroscopy 316:64–71. doi: 10.1016/j.jms.2015.06.010
• Forthomme D, McRaven CP, Sears TJ, Hall GE (2014) Collinear two-color saturation spectroscopy in CN A–X (1–0) and (2–0) bands. Journal of Molecular Spectroscopy 296:36–42. doi: 10.1016/j.jms.2013.12.006
• Cich MJ, Forthomme D, McRaven CP, Lopez GV, Hall GE, Sears TJ, Mantz AW (2013) Temperature-Dependent, Nitrogen-Perturbed Line Shape Measurements in the ν1+ ν3Band of Acetylene Using a Diode Laser Referenced to a Frequency Comb. The Journal of Physical Chemistry A 117:13908–13918. doi: 10.1021/jp408960e
• Forthomme D, McRaven CP, Sears TJ, Hall GE (2013) Argon-Induced Pressure Broadening, Shifting, and Narrowing in the CN A2Π–X2Σ+ (1–0) Band. The Journal of Physical Chemistry A 117:11837–11846. doi: 10.1021/jp4030359
• Chang C-H, Hall GE, Sears TJ (2010) Sub-Doppler spectroscopy of mixed state levels in CH2. The Journal of Chemical Physics 133:144310. doi: 10.1063/1.3502084