June 21, 2021 DR. JEFFREY W. HUDGENS 

Publications [h-index = 35*; i10-index = 84; Erdös Number = 5†] 

141. "Dataset from HDX-MS Studies of IgG1 Glycoforms and Their Interactions with the FcγRIa

(CD64) Receptor" 

K. W. Anderson, K. Scott, I. L. Karageorgos, E. S. Gallagher, V. S. Tayi, M. Butler, and J. W. 

Hudgens 

Journal of Research of the National Institute of Standards and Technology 126:126010 (2021). 

https://doi.org/10.6028/jres.126.010 DOI: 10.6028/jres.126.010 PMCID: PMID: 

140. "Conformational gating, dynamics and allostery in human monoacylglycerol lipase" 

S. Tyukhtenko, X. Ma, G. Rajarshi, I. Karageorgos, K. W. Anderson, J. W. Hudgens, J. J. 

Gao, M. L. Nasr, N. Zvonok, K. Vemuri, G. Wagner, and A. Makriyannis Scientific Reports 

10(1), 18531 (2020). https://rdcu.be/b9lqP DOI: 10.1038/s41598-020-75497-5 PMCID: 

PMID: 

139. "Construction of a Dual Protease Column, Subzero (-30 oC) Chromatography System and 

Multi-channel Precision Temperature Controller for Hydrogen-Deuterium Exchange Mass 

Spectrometry" 

J. W. Hudgens, Journal of Research of the National Institute of Standards and Technology 125, 

Article No. 125025 (2020). DOI: 10.6028/jres.125.025 (https://doi.org/10.6028/jres.125.025), 

Database Archive: https://doi.org/10.18434/M32151 

138. "Interlaboratory Comparison of Hydrogen–Deuterium Exchange Mass Spectrometry 

Measurements of the Fab Fragment of NISTmAb" 

J. W Hudgens, E. S.Gallagher, I. Karageorgos, K. W. Anderson, R. Y. C. Huang, G. Chen, , G. 

M.Bou-Assaf A. Espada, M. J Chalmers,. E. Harguindey,. H.-M. Zhang, B. T. Walters, J. Zhang, 

J. D. Venable, C. Steckler, I. Park, A. Brock, X. Lu, R. K. Pandey, A. Chandramohan, G. S. Anand, 

S. N. Nirudodhi, J. B. Sperry, J. C. Rouse, J. A. Carroll, K. D. Rand, U. Leurs, D. D. Weis, M. A. 

Al-Naqshabandi, T. S. Hageman, D. Deredge, P. L. Wintrode, M. Papanastasiou, J. D. Lambris, S. 

Li, and S.Urata 

Analytical Chemistry 91, 7336-7345 (2019). DOI: 10.1021/acs.analchem.9b01100 PMID: 

31045344 https://pubs.acs.org/doi/10.1021/acs.analchem.9b01100. 

137. "Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) Centroid Data Measured 

between 3.6 oC and 25.4 oC for the Fab Fragment of NISTmAb" 

J. W Hudgens, E. S.Gallagher, I. Karageorgos, K. W. Anderson, R. Y. C. Huang, G. Chen, , G. 

M.Bou-Assaf A. Espada, M. J Chalmers,. E. Harguindey,. H.-M. Zhang, B. T. Walters, J. Zhang, J. 

D. Venable, C. Steckler, I. Park, A. Brock, X. Lu, R. K. Pandey, A. Chandramohan, G. S. Anand, S. 

N. Nirudodhi, J. B. Sperry, J. C. Rouse, J. A. Carroll, K. D. Rand, U. Leurs, D. D. Weis, M. A. AlNaqshabandi, T. S. Hageman, D. Deredge, P. L. Wintrode, M. Papanastasiou, J. D. Lambris, S. Li, 

and S.Urata 

Journal of Research of the National Institute of Standards and Technology 124, 124009 (2019) 

https://doi.org/10.6028/jres.124.009, Database Archive: https://doi.org/10.18434/8SX3-NQ49 

* Citation statistics provided by Google Scholar. 

† Derived from data provided at http://www.oakland.edu/enp/. 

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136. "Automated removal of phospholipids from membrane proteins for H/D exchange mass 

spectrometry workflows" 

K. W. Anderson, E. S. Gallagher, and J. W. Hudgens 

Analytical Chemistry 90, 6409−6412 (2018). DOI: 10.1021/acs.analchem.8b00429 PMCID:

PMC6050989 PMID: 29723469 

135. “Effects of Distal Mutations on the Structure, Dynamics, and Catalysis of Human 

Monoacylglycerol Lipase” 

S. Tyukhtenko, G. Rajarshi, I. Karageorgos, N. Zvonok, E. S. Gallagher, H. Huang, K. 

Vemuri, J. W. Hudgens, X. Ma, M. L. Nasr, S. Pavlopoulos, and A. Makriyannis 

Scientific Reports 8, 1719 (2018). DOI: 10.1038/s41598-017-19135-7 PMCID: 

PMC5789057 PMID: 29379013 

134. "Data on crystal organization in the structure of the Fab fragment from the NIST reference 

antibody, RM 8671" 

I. Karageorgos, C. Galvin, D. T. Gallagher, and J. W. Hudgens 

Data in Brief 16, 29-36 (2018). DOI: 10.1016/j.dib.2017.11.013 PMID:29167817 

PMCID:PMC5686461 

133. "Biophysical characterization and structure of the Fab fragment from the NIST reference 

antibody RM 8671" 

I. Karageorgos, E. S. Gallagher, C. Galvin, D. T. Gallagher, and J. W. Hudgens 

Biologicals 50, 27-34 (2017). DOI: 10.1016/j.biologicals.2017.09.005 PMID: 28965821 

PMCID: PMC5856035 

132. "Conformational Changes in Active and Inactive States of Human PP2Cα Characterized by

Hydrogen/Deuterium Exchange-Mass Spectrometry" 

S. J. Mazur, E. S. Gallagher, S. Debnath, S. R. Durell, K. W. Anderson, L. M. M. Jenkins, E. 

Appella, and J. W. Hudgens 

Biochemistry, 56, 2676−2689 (2017). DOI: 10.1021/acs.biochem.6b01220. PMID: 28481111

PMCID: PMC5593270 

131. "Mapping of the Allosteric Site in Cholesterol Hydroxylase CYP46A1 for Efavirenz, a Drug 

That Stimulates Enzyme Activity" 

K. W. Anderson, N. Mast, J. W. Hudgens, J. B. Lin, I. V. Turko, and I. A. Pikuleva, Journal of 

Biological Chemistry 291, 11876-11886 (2016). DOI:10.1074/jbc.M116.723577 PMID: 

27056331 PMCID: PMC4882454 

130. "Mapping Protein-Ligand Interactions with Proteolytic-Digestion, Hydrogen/Deuterium 

Exchange-Mass Spectrometry" 

E. S. Gallagher and J. W. Hudgens 

Methods in Enzymology, 556, 357-404 (2016). DOI: 10.1016/bs.mie.2015.08.010. PMID: 

26791987 

129. "Method Validation and Standards in Hydrogen Exchange Mass Spectrometry" 

J. W. Hudgens, R. Y.-C. Huang and E. D'Ambro, Chapter 4 in Hydrogen Exchange Mass 

Spectrometry of Proteins: Fundamentals, Techniques and Applications; David Weis, ed., pp 55-

72 (Wiley-Blackwell, 2016), Print ISBN:9781118616499 |Online ISBN:9781118703748 

|DOI:10.1002/9781118703748. 

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128. "Emerging Technologies to Assess the Higher-Order Structure of Monoclonal Antibodies" 

J.P. Marino, R.G. Brinson, J.W. Hudgens, J.E. Ladner, D.T. Gallagher, E. S. Gallagher, L.W. 

Arbogast, and R. Y.-C. Huang Emerging Technologies To Assess the Higher Order Structure of 

Monoclonal Antibodies. In State-of-the-Art and Emerging Technologies for Therapeutic 

Monoclonal Antibody Characterization Volume 3. Defining the Next Generation of Analytical and 

Biophysical Techniques, Schiel, J.; Borisov, O.; Davis, D., eds. American Chemical Society: 2015; 

Vol. 1202, pp 17-43. DOI:10.1021/bk-2015-1202.ch002 

127. "Characterization of AlgMsp, an Alginate Lyase from Microbulbifer sp. 6532A" 

S. M. Swift, J. W. Hudgens, R. D. Heselpoth, P. M. Bales, and D. C. Nelson 

PLoS ONE, 9(11), e112939 (2014). DOI: 10.1371/journal.pone.0112939 PMID: 25409178 

PMCID: PMC4237336 

126. "A New Mechanism for Regulating Proliferating Cell Nuclear Antigen (PCNA) Activity 

Identified by Mutational Analyses and Hydrogen/Deuterium Exchange Mass Spectrometry" 

Z. Li, R. Y.-C. Huang, D. C. Yopp, T. H. Hileman, T. J. Santangelo, J. Hurwitz, J. W. Hudgens, and 

Z. Kelman 

Nucleic Acids Research, 42, 5776-5789 (2014). DOI: 10.1093/nar/gku239 PMID: 24728986 

125. "The Effects of Desialylation on Human α1-Acid Glycoprotein-Ligand Interactions"

R. Y.-C. Huang and J. W. Hudgens 

Biochemistry 52, 7127–7136 (2013). DOI: 10.1021/bi4011094 PMID: 24041412 

124. "Surface Mediated Assembly of Small, Metastable Gold Nanoclusters" 

J. M. Pettibone, W. A. Osborn, K. Rykaczewski, A. A. Talin, J. E. Bonevich, and J. W. Hudgens 

and M. D. Allendorf 

Nanoscale 5, 6558-6566 (2013). DOI: 10.1039/c3nr01708g PMID: 23759958 

123. "Reaction Network Governing Diphosphine-Protected Gold Nanocluster Formation from 

Nascent Cationic Platforms" 

J. M. Pettibone and J. W. Hudgens 

Phys. Chem. Chem. Phys. 14, 4142-4154 (2011). doi: 10.1039/c2cp22865c. PMID: 22337143 

122. "Predictive Gold Nanocluster Formation Controlled by Metal-ligand Complexes" 

J. M. Pettibone and J. W. Hudgens 

Small 8, 715-725 (2012). DOI: 10.1002/smll.201101777 PMID: 22228703 

121. "Reaction Mechanism Governing the Formation of 1,3-bis(diphenylphosphino)propaneprotected Gold Nanoclusters" 

J. W. Hudgens, J. M. Pettibone, T. P. Senftle, and R. N. Bratton 

Inorg. Chem. 50, 10178–10189 (2011). DOI: 10.1021/ic2018506 PMID: 21928777 

120. "Gold Cluster Formation with Phosphine Ligands: Etching as a Size-Selective Synthetic 

Pathway for Small Clusters?" 

J. M. Pettibone and J. W. Hudgens 

ACS Nano 5, 2989–3002 (2011). DOI: 10.1021/nn200053b. PMID: 21381761 

119. "Synthetic Approach for Tunable, Size-Selective Formation of Monodisperse, DiphosphineProtected Gold Nanoclusters" 

J. M. Pettibone and J. W. Hudgens 

J. Phys. Chem. Lett 1, 2536–2540 (2010). DOI: 10.1021/jz1009339 

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118. “NIST Chemical Kinetics Database, NIST Standard Reference Database 17, Version 7.0 

(Web Version)” J. A. Manion, R. E. Huie, R. D. Levin, D. R. Burgess Jr., V. L. Orkin, W. Tsang, 

W. S. McGivern, J. W. Hudgens, V. D. Knyazev, D. B. Atkinson, E. Chai, A. M. Tereza, C.-Y. Lin, T. 

C. Allison, W. G. Mallard, F. Westley, J. T. Herron, R. F. Hampson, and D. H. Frizzell, National 

Institute of Standards and Technology; Gaithersburg, Maryland, 20899-8320. 

http://kinetics.nist.gov 

117. "Identification of Active Sites of Biomolecules II: Saccharide and Transition Metal Ion in 

Aqueous Solution" 

O. Coskuner, D. E. Bergeron, L. Rincon, J. W. Hudgens, and C. A. Gonzalez 

J. Phys. Chem. A 113, 2491–2499 (2009). DOI: 10.1021/jp805747f PMID: 19236000 

116. "Glycosidic Linkage Conformation of Methyl-α-mannopyranoside"

O. Coskuner, D. E. Bergeron, L. Rincon, J. W. Hudgens, and C. A. Gonzalez 

J. Chem. Phys. 129, 045102 (2008). DOI: 10.1063/1.2958916 PMID: 18681681 

115. "Ligand Exchange Reactions in the Formation of Diphosphine-Protected Gold Clusters" 

D.E. Bergeron, O. Coskuner, J.W. Hudgens, C.A. Gonzalez 

J. Phys. Chem. C 112,115- 12808–12814 (2008) DOI: 10.1021/jp804046e 

114. "Identification of Active Sites of Biomolecules I: methyl-α-mannopyranoside and FeIII" 

O. Coskuner, D. E. Bergeron, L. Rincon, J. W. Hudgens, and C. A. Gonzalez 

J. Phys. Chem. A 112, 2940-2947 (2008). DOI: 10.1021/jp711759q 

113. "A Hadamard Transform Electron Ionization Mass Spectrometer" 

J. W. Hudgens and D. E. Bergeron 

Rev. Sci. Instrum. 79, 014102 (2008). DOI: 10.1063/1.2838174 PMID: 18248052 

112. "Impact of Swapping Ethyl for Phenyl Groups on Diphosphine-protected Undecagold" 

J. S. Golightly, L. Gao, A. W. Castleman, Jr., D. E. Bergeron, J. W. Hudgens, R. J. Magyar, and C. 

A. Gonzalez 

J. Phys. Chem. C 111, 14625-14627 (2007), [ DOI: 10.1021/jp076375p] 

111. "Ligand Dissociation and Core Fission from Diphosphine Protected Gold Clusters" 

D. E. Bergeron and J. W. Hudgens 

J. Phys. Chem. C 111, 8195-8201 (2007). DOI: 10.1021/jp0712811 

110. "Workshop on Combustion Simulation Databases for Real Transportation Fuels" 

T.C. Allison, D.R. Burgess, Jr., J.W. Hudgens, J.A. Manion, D.M. Matheu, W. Tsang; J.W. 

Hudgens, Editor 

NISTIR 7155, National Institute of Standards & Technology, Gaithersburg, MD, Sept 4-5, 2003. 

109. "Chlorination Chemistry 4. Ab initio Study of the Addition, Metathesis, and Isomerization 

Channels Governing the Reaction of Chlorine Atom with Propargyl Chloride" 

J. W. Hudgens and C. Gonzalez 

J. Phys. Chem. A 106, 6143-6153 (2002). DOI: 10.1021/jp013920s 

108. "Chlorination Chemistry 3. Ab initio Study of the Reaction of Chlorine Atom with Allene" 

J. W. Hudgens and C. Gonzalez 

J. Phys. Chem. A 106, 1739-1745 (2002). DOI: 10.1021/jp013862a 

107. "Electronic Structure of BCl Determined by ab initio Calculations and Resonance-Enhanced 

Multiphoton Ionization Spectroscopy" 

K. K. Irikura, J. W. Hudgens and R. D. Johnson III 

J. Phys. Chem. A 104, 3800 (2000). DOI: 10.1021/jp994011u 

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106. "Chlorination Chemistry 2. Rate Coefficients, Reaction Mechanism, and Spectrum of the 

Chlorine Adduct of Allene" 

D. B. Atkinson and J. W. Hudgens 

J. Phys. Chem. A 104, 811 (2000). DOI: 10.1021/jp9927247 

105. "Chlorination Chemistry 1. Rate Coefficients, Reaction Mechanisms, and Spectra of the 

Chlorine and Bromine Adducts of Propargyl Halides" 

D. B. Atkinson and J. W. Hudgens 

J. Phys. Chem. A 103, 7978-7989 (1999). DOI: 10.1021/jp991076o 

104. "Kinetic Studies of Reactions of IO Radicals Determined by Cavity Ring-down 

Spectroscopy" 

D. B. Atkinson, J. W. Hudgens and A. J. Orr-Ewing 

J. Phys. Chem. A 103, 6173-6180 (1999). DOI: 10.1021/jp9902497 

103. "Rate Coefficients for the Propargyl Radical Self-reaction and Oxygen Addition 

Reaction Measured using Ultraviolet Cavity Ring-down Spectroscopy" 

D. B. Atkinson and J. W. Hudgens 

J. Phys. Chem. A 102, 4242-4252 (1999). DOI: 10.1021/jp990468s 

102. "Fourth International Conference on Chemical Kinetics" 

R. E. Huie and J. W. Hudgens 

J. Res. Nat. Inst. Stds. Tech., 103, 425 (1998). 

101. "Evanescent Wave Cavity Ring-down Spectroscopy as a Probe of Surface Processes" 

A. C. R. Pipino, J. W. Hudgens and R. E. Huie 

Chem. Phys. Lett. 280, 104-112 (1997). DOI: 10.1016/S0009-2614(97)01080-4 

100. "Evanescent Wave Cavity Ring-down Spectroscopy with a Total-internal-reflection 

Minicavity" 

A. C. R. Pipino, J. W. Hudgens and R. E. Huie 

Rev. Sci. Instrum. 68, 2978 (1997). DOI: 10.1063/1.1148230 

99. "Ion Pair States of the ClO Radical Observed by Resonance Enhanced Multiphoton 

Ionisation Spectroscopy" 

M. J. Cooper, T. Diez-Rojoa, L. J. Rogers, C. M. Western, M. N. R. Ashfold and J. W. Hudgens 

Chem. Phys. Lett. 272, 232 (1997). DOI: 10.1016/S0009-2614(97)88014-1 

98. "Chemical Kinetic Studies Using Ultraviolet Cavity Ring-Down Spectroscopic Detection: 

Self-reaction of Ethyl and Ethylperoxy Radicals and the Reaction, O2 + C2H5  C2H5O2" 

D. B. Atkinson and J. W. Hudgens 

J. Phys. Chem. A 101, 3901-3909 (1997). DOI: 10.1021/jp970240+ 

97. "Electronic Structure of the BF2 Radical Determined by ab initio Calculations and Resonance 

Enhanced Multiphoton Ionization Spectroscopy" 

D. B. Atkinson, K. K. Irikura and J. W. Hudgens 

J. Phys. Chem. A 101, 2045-2049 (1997). DOI: 10.1021/jp9623251 

96. "Spectroscopic Characterization of the AsF2 Radical" 

J. L. Brum and J. W. Hudgens 

J. Chem. Phys. 106, 485-488 (1997). DOI:10.1063/1.473389 

95. "Structural and Thermochemical Properties of Hydroxymethyl (CH2OH) Radicals and 

Cations Derived from Observations of B2A'(3p) ← X2A" Electronic Spectra and from ab 

initio Calculations" 

R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 100, 19874-19890 (1996). DOI: 10.1021/jp961399+ 

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94. "Resonance Enhanced Multiphoton Ionisation of the SiF Radical: A Reinvestigation" 

M. N. R. Ashfold, J. Pearson, J. W. Hudgens and R. D. Johnson III 

Chem. Phys. Lett. 263, 138 (1996). DOI: 10.1016/S0009-2614(96)01153-0 

93. "Excited Electronic States of the SiF2 Radical Studied by Resonance Enhanced Multiphoton 

Ionisation Spectroscopy and by ab initio Methods" 

R. D. Johnson III, J. W. Hudgens and M. N. R. Ashfold 

Chem. Phys. Lett. 261, 474-480 (1996). DOI: 10.1016/0009-2614(96)00990-6 

92. "Characterisation of the E 1A1 Rydberg State of Ammonia by Resonance Enhanced 

Multiphoton Ionisation Spectroscopy" 

M. N. R. Ashfold, C. M. Western, J. W. Hudgens and R. D. Johnson III 

Chem. Phys. Lett. 260, 27 (1996). DOI: 10.1016/0009-2614(96)00803-2 

91. "Resonance Enhanced Multiphoton Ionization Spectroscopy of the SnF Radical 

J. Pearson, R. N. Dixon, J. W. Hudgens and R. D. Johnson III 

J. Chem. Phys. 104, 4406 (1996). DOI:10.1063/1.471192 

90. "Resonance Enhanced Multiphoton Ionization Spectroscopy of the PF Radical" 

J. D. Howe, M. N. R. Ashfold, C. M. Western and J. W. Hudgens 

J. Chem. Phys. 104, 2789-2800 (1996). DOI:10.1063/1.471102 

89. "Spectroscopy of the Fluoromethylene Radicals HCF and DCF by 2+1 Resonance Enhanced 

Multiphoton Ionization Spectroscopy and by ab initio Calculation" 

K. K. Irikura, J. W. Hudgens and R. D. Johnson III 

J. Chem. Phys. 103, 1303-1308 (1995). DOI:10.1063/1.469807 

88. "Importance of Chemistry in Non-Thermal Plasma Control of Volatile Organic Compounds 

and Air Toxics" 

A. W. Miziolek, J. T. Herron, W. G. Mallard, J. W. Hudgens, D. S. Green, W. Tsang and J-S Chang 

Electromagnetic Devices and Processes in Environment Protection, International Conference 

ELECO '94, Kazimeirz Dolny, Poland (ISBN: 83-86333-60-X), p. 65. 

87. "Observation of the PF2 Radical by Resonance Enhanced Multiphoton Ionization 

Spectroscopy" 

J. D. Howe, M. N. R. Ashfold, J. W. Hudgens, and R. D. Johnson III 

J. Chem. Phys. 101, 3549-3557 (1994). DOI:10.1063/1.468429 

86. "Resonance Enhanced Multiphoton Ionization Spectroscopy of the P2 Radical" 

J. D. Howe, M. N. R. Ashfold and J. W. Hudgens 

J. Chem. Phys. 101, 833-835 (1994). DOI: 10.1063/1.468140 

85. "Multiphoton Ionization Spectroscopy of PCl2 Radicals: Observation of Two New Rydberg 

States" 

J. L. Brum and J. W. Hudgens 

J. Phys. Chem. 98, 5587-5590 (1994). DOI: 10.1021/j100073a001 

84. "New Spectroscopy of Free Radicals Produced by the Reactions of Fluorine and Chlorine 

with Diborane" 

J. W. Hudgens, K. K. Irikura and R. D. Johnson III 

Laser Techniques for State-Selected and State-to-State Chemistry II, 94/SPIE, J. Hepburn, ed., 

Proc. SPIE 2124, 108 (1994). DOI: 10.1117/12.178120 

83. "Electronic Spectrum of the ,-Difluoroethyl Radical" 

J. L. Brum and J. W. Hudgens 

J. Phys. Chem. 98, 3645-3649 (1994). DOI: 10.1021/j100065a017 

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82. "Detection and Characterization of Gas-Phase InCl using Resonance Enhanced Multiphoton 

Ionization" 

D. Dearden, R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 100, 3422-3428 (1994). DOI:10.1063/1.467246 

81. "Aluminum Monochloride Excited States Observed by Resonance-Enhanced Multiphoton 

Ionization Spectroscopy" 

D. V. Dearden, R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 99, 7521-7528 (1993). DOI:10.1063/1.465682 

80. "A New Rydberg Series in Atomic Boron" 

K. K. Irikura, R. D. Johnson III and J. W. Hudgens 

J. Opt. Soc. B 10, 763 (1993). 

79. "Detection of 11BF and 10BF by Resonance-Enhanced Multiphoton Ionization" 

K. K. Irikura, R. D. Johnson III and J. W. Hudgens 

Laser Techniques for State-Selected and State-to-State Chemistry II, 94/SPIE, 62, 1697 (1993). 

78. "New Ways to Optically Detect CH2 and HCF Radicals Using Resonance Enhanced 

Multiphoton Ionization Spectroscopy" 

J. W. Hudgens, R. D. Johnson III and K. K. Irikura 

Laser Techniques for State-Selected and State-to-State Chemistry, 93/SPIE, Cheuk-Yiu Ng, ed., 

Proc. SPIE 1858, 15-21 (1993). DOI: 10.1117/12.143083 

77. "Electronic Spectra of the Heteroisotopic CH2D and CD2H Radicals by Resonance- Enhanced 

Multiphoton Ionization" 

J. L. Brum, R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 98, 3732-3736 (1993). DOI:10.1063/1.464051 

76. "New Electronic Spectra of the CHFCl Radical Observed with Resonance Enhanced 

Multiphoton Ionization" 

J. W. Hudgens, R. D. Johnson III and B. P. Tsai 

J. Chem. Phys. 98, 1925-1932 (1993). doi:10.1063/1.464226 

75. "Detection and Characterization of Gas-Phase GaCl Using Resonance Enhanced 

Multiphoton Ionization" 

D. Dearden, R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 97, 8880-8885 (1992). doi:10.1063/1.463362 

74. "Triplet Rydberg States of the Imidogen Radical Characterized via Two Photon Resonance 

Enhanced Multiphoton Ionisation Spectroscopy" 

S. G. Clement, M. N. R. Ashfold, C. M. Western, R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 97, 7064-7072 (1992). DOI: 10.1063/1.463532 

73. "Two New Electronic States of CH2" 

K. K. Irikura, R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 96, 6131-6133 (1992). DOI: 10.1021/j100194a010 

72. "Electronic Spectrum of the SiCl3 Radical" 

K. K. Irikura, R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 96, 4306-4310 (1992). DOI: 10.1021/j100190a038 

71. "Triplet Excited States of the NH(ND) Radical Revealed via Two Photon Resonant 

Multiphoton Ionization Spectroscopy" 

S. G. Clement, M. N. R. Ashfold, C. M. Western, R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 96, 5538 (1992). DOI: 10.1063/1.462691 

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70. "Spectra and ab initio Calculations of Difluoromethyl Radicals and Cations" 

D. Dearden, J. W. Hudgens, R. D. Johnson III, B. P. Tsai and S. Kafafi 

J. Phys. Chem. 96, 585-594 (1992). DOI: 10.1021/j100181a017 

69. "Detection of CH2 (X3B1) Radicals by 3+1 Resonance Enhanced Multiphoton Ionization 

Spectroscopy" 

K. K. Irikura and J. W. Hudgens 

J. Phys. Chem. 96, 518-519 (1992). DOI: 10.1021/j100181a006 

68. "Kinetics of the Reaction, CCl3 + Br2, and the Thermochemistry of the CCl3 Radical and 

Cation" 

J. W. Hudgens, R. D. Johnson III, R. S. Timonen, J. A. Seetula and D. Gutman 

J. Phys. Chem. 95, 4400-4405 (1991). DOI: 10.1021/j100164a043 

67. "New Rydberg States of Aluminum Monofluoride Observed by Resonance Enhanced 

Multiphoton Ionization Spectroscopy" 

D. Dearden, R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 95, 4291-4292 (1991). DOI: 10.1021/j100164a022 

66. "Multiphoton Ionization SiH3 and SiD3 Radicals II: Three Photon Resonance-Enhanced 

Spectra Observed between 460 and 600 nm" 

R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 94, 5331 (1991). DOI: 10.1063/1.460518 

65. "New Electronic States of the NH and ND Radicals Observed between 258 and 288 nm by 

Resonance Enhanced Multiphoton Ionization" 

R. D. Johnson III and J. W. Hudgens 

J. Chem. Phys. 92, 6420 (1990). DOI: 10.1063/1.458321 

64. "Experimental and ab initio Studies of Electronic Structures of the CCl3 Radical and Cation" 

J. W. Hudgens, R. D. Johnson III, B. P. Tsai and S. Kafafi 

J. Am. Chem. Soc. 112, 5763-5772 (1990). DOI: 10.1021/ja00171a015 

63. "New Electronic States of the NH and ND Observed by Resonance Enhanced Multiphoton 

Ionization Spectroscopy" 

R. D. Johnson III and J. W. Hudgens 

1st International Conference of Laboratory Research for Planetary Atmospheres (NASA Conf. 

Publ. 3077), K. Fox, J. E. Allen, Jr., L.J. Steif, and D. T. Quillen, eds., p. 164. 

62. "Electronic Spectra of SF2 Radicals between 295 and 495 nm Observed with Resonance 

Enhanced Multiphoton Ionization Spectroscopy" 

R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 94, 3273-3276 (1990). DOI: 10.1021/j100371a011 

61. "Multiphoton Ionization of SiH3 and SiD3 Radicals: Electronic Spectra, Vibrational Analyses 

of the Ground and Rydberg States, and Ionization Potential" 

R. D. Johnson III, B. P. Tsai and J. W. Hudgens 

J. Chem. Phys. 91, 3340 (1989). DOI: 10.1063/1.456909 

60. "New Electronic State of SiH and SiD Radicals Observed by Resonance Enhanced 

Multiphoton Ionization Spectroscopy" 

R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 93, 6268-6270 (1989). DOI: 10.1021/j100354a003 

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59. "Electronic Spectra of CF2Cl and CFCl2 Radicals Observed by Resonance- Enhanced 

Multiphoton Ionization" 

B. P. Tsai, R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 93, 5334-5336 (1989). DOI: 10.1021/j100351a004 

58. "Spectrum (310 to 360 nm) and Ionization Potential of the Silyl Radical" 

R. D. Johnson III, B. P. Tsai and J. W. Hudgens 

AIP Conf. Proc. 191, 497-499 (1989). DOI: 10.1063/1.38617 

57. "Two Photon Resonance Enhanced Multiphoton Ionization Detection and Spectroscopy of 

Gas Phase Germyl (GeH3) Radicals" 

J. W. Hudgens, R. D. Johnson III and B. P. Tsai 

AIP Conf. Proc. 191, 475-477 (1989). DOI: 10.1063/1.2931562 

56. "Ab Initio Calculations of the Electronic Structure and Vibrational Frequencies of the 

Dichloromethyl Radical and Cation" 

S. Kafafi and J. W. Hudgens 

J. Phys. Chem. 93, 3474-3479 (1989). DOI: 10.1021/j100346a023 

55. "Resonance Enhanced Multiphoton Ionization Spectra of the GeF and GeCl Radicals 

between 400 and 500 nm" 

R. D. Johnson III, B. P. Tsai and J. W. Hudgens 

J. Chem. Phys. 89, 6064 (1988). DOI: 10.1063/1.455421 

54. "The Electronic Spectrum of the GeH3 Radical" 

R. D. Johnson III, B. P. Tsai and J. W. Hudgens 

J. Chem. Phys. 89, 4558 (1988). DOI: 10.1063/1.454796 

53. "A New Electronic Spectrum of the SiH3 Radical Observed Using Multiphoton Ionization 

Spectroscopy" 

R. D. Johnson III, B. P. Tsai and J. W. Hudgens 

Resonance Ionization Spectroscopy and Its Applications, Fourth International Symposium on 

Resonance Ionization Spectroscopy, (Institute of Physics Conf. Ser. No. 94, Institute of Physics, 

Bristol, UK, 1988), p. 133-136. ISBN: 0-85498-188-8 

52. "Resonance Enhanced Multiphoton Ionization Spectroscopy of 2-Butene-1-yl (C4H7) Between 

455-485 nm" 

B. P. Tsai, R. D. Johnson III and J. W. Hudgens 

Resonance Ionization Spectroscopy and Its Applications, Fourth International Symposium on 

Resonance Ionization Spectroscopy (Institute of Physics Conf. Ser. No. 94, Institute of Physics, 

Bristol, UK, 1988), p. 129. ISBN: 0-85498-188-8 

51. "Resonance Enhanced Multiphoton Ionization Detection of GeF and GeCl Radicals" 

J. W. Hudgens, R. D. Johnson III and B. P. Tsai 

Resonance Ionization Spectroscopy and Its Applications, Fourth International Symposium on 

Resonance Ionization Spectroscopy (Institute of Physics Conf. Ser. No. 94, Institute of Physics, 

Bristol, UK, 1988), p. 125-128. ISBN: 0-85498-188-8 

50. "Resonance Enhanced Multiphoton Ionization Spectroscopy of SiCl Between 400 and 500 

nm" 

R. D. Johnson III and J. W. Hudgens 

Advances in Laser Science III, No. 172, Optical Science and Engineering Series, No. 9, A. C. Tam, 

J. L. Gole, and W. C. Stwalley, eds., American Institute of Physics Conf. Proc. 172, 340-342 

(1988). DOI: 10.1063/1.37336 

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49. "Resonance Enhanced Multiphoton Ionization Spectroscopy of CHCl2 and CDCl2" 

J. W. Hudgens and G. R. Long 

Advances in Laser Science III, No. 172, Optical Science and Engineering Series, No. 9, A. C. Tam, 

J. L. Gole, and W. C. Stwalley, eds., American Institute of Physics Conf. Proc. 172, 337-339 

(1988). DOI: 10.1063/1.37335 

48. "Multiphoton Ionization Spectroscopy of SiCl Radicals between 430 and 520 nm" 

R. D. Johnson III, E. Fang and J. W. Hudgens 

J. Phys. Chem. 92, 3880-3883 (1988). DOI: 10.1021/j100324a040 

47. Erratum: "Two Photon Resonance Enhanced Multiphoton Ionization Spectroscopy of Gas 

Phase O2(a 1Δg) Molecules between 305-350 nm" 

R. D. Johnson III, G. R. Long and J. W. Hudgens 

J. Chem. Phys. 89, 3930 (1988). DOI: 10.1063/1.455745 

46. "Progress in Resonance Enhanced Multiphoton Ionization Spectroscopy of Transient Free 

Radicals" 

J. W. Hudgens 

Advances in Multi-photon Processes and Spectroscopy, Vol. 4, S. H. Lin, ed., World Scientific 

Publishing Co., Singapore, (1988), pp. 171-296. ISBN: 978-9971-5-0577-6 

45. "A New Electronic Spectrum of the SiH3 Radical Observed by Multiphoton Ionization 

Spectroscopy" 

R. D. Johnson III and J. W. Hudgens 

Chem. Phys. Lett. 141, 163 (1987). DOI: 10.1016/0009-2614(87)85002-9 

44. "Two Photon Resonance Enhanced Ionization Spectra of the 3p D 2Πr (v'=0,1,2) ←←X 2Πr 

(v"=0) Bands of the CF Radical Between 355 and 385 nm" 

R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 91, 6189-6191 (1987). DOI: 10.1021/j100308a025 

43. "Resonance Enhanced Multiphoton Ionization Spectroscopy of CHCl2 and CDCl2" 

G. R. Long and J. W. Hudgens 

J. Phys. Chem. 91, 5870-5872 (1987). DOI: 10.1021/j100307a011 

42. "Multiphoton Ionization Spectra of Radical Products in the F(2P) + Ketene System: Spectral 

Assignments and Formation Reaction for CH2F, Observation of CH and CF" 

J. W. Hudgens, C. S. Dulcey, G. R. Long and D. J. Bogan 

J. Chem. Phys. 87, 4546 (1987). DOI: 10.1063/1.452867 

41. "Two Photon Resonance Enhanced Multiphoton Ionization Spectroscopy of Gas Phase O2(a 

1Δg) Molecules between 305-350 nm" 

R. D. Johnson III, G. R. Long and J. W. Hudgens 

J. Chem. Phys. 87, 1977 (1987) . DOI: 10.1063/1.453170 

40. "Detection of Gas-Phase Methoxy Radicals by Resonance-Enhanced Multiphoton Ionization" 

G. R. Long, R. D. Johnson III and J. W. Hudgens 

J. Phys. Chem. 90, 4901-4903 (1986). DOI: 10.1021/j100412a001 

39. "Multiphoton Ionization Spectroscopy and Vibrational Analysis of a 3p Rydberg State of the 

Hydroxymethyl Radical" 

C. S. Dulcey and J. W. Hudgens 

J. Chem. Phys. 84, 5262 (1986). DOI: 10.1063/1.449935 

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38. "Two and Three Photon Resonance Enhanced Multiphoton Ionization and Spectroscopy of 

the Gas Phase Methyl Radical" 

T. G. DiGiuseppe, J. W. Hudgens and M. C. Lin 

Lasers as Reactants and Probes in Chemistry, W. M. Jackson and A. B. Harvey, eds., Howard 

University Press, Washington, D. C. (1985), p. 121. ISBN: 978-0882581415 

37. "Multiphoton Ionization of Radicals: Pyrolysis and Infrared Multiphoton Generated CF3 and 

CH3" 

M. T. Duignan, T. G. DiGiuseppe, J. W. Hudgens and J. R. Wyatt 

Lasers as Reactants and Probes in Chemistry, W. M. Jackson and A. B. Harvey, eds., Howard 

University Press, Washington, D. C. (1985), p. 113. ISBN: 978-0882581415 

36. "Infrared Fluorescence from CO2 Excited SF6 Observed Under Nearly Collisionless 

Conditions" 

J. W. Hudgens and J. D. McDonald 

Lasers as Reactants and Probes in Chemistry, W. M. Jackson and A. B. Harvey, eds., Howard 

University Press, Washington, D. C. (1985), p. 71. ISBN: 978-0882581415 

35. "Multiphoton Ionization Detection of Gas-Phase Benzyl Radicals" 

M. A. Hoffbauer and J. W. Hudgens 

J. Phys. Chem. 89, 5152-5154 (1985). DOI: 10.1021/j100270a005 

34. "Detection of SiF Radicals by Multiphoton Ionization Spectroscopy" 

C. S. Dulcey and J. W. Hudgens 

Chem. Phys. Lett. 118, 444-447 (1985). DOI: 10.1016/0009-2614(85)85408-7 

33. "Multiphoton Ionization Spectroscopy of ClO and BrO Radicals" 

M. T. Duignan and J. W. Hudgens 

J. Chem. Phys. 82, 4426 (1985). DOI: 10.1063/1.448745 

32. "Observation of the 3s 2A1 Rydberg States of Allyl and 2-Methylallyl Radicals with 

Multiphoton Ionization Spectroscopy" 

J. W. Hudgens and C. S. Dulcey 

J. Phys. Chem. 89, 1505-1509 (1985). DOI: 10.1021/j100254a039 

31. "Multiphoton Ionization Spectroscopy of the Fluoromethyl Radical" 

C. S. Dulcey, D. J. Bogan and J. W. Hudgens 

Laser techniques in the extreme ultraviolet; Proceedings of the Second Topical Meeting, Boulder, 

CO, March 5-7, 1984, Harris, S. E.; Lucatorto, T. B., Eds. American Institute of Physics (AIP 

Conference Proceedings, No. 119, Subseries on Optical Science and Engineering, No. 5), New 

York (1984), p. 156. DOI: 10.1063/1.34658 

30. "Detection of Iron in Lithium Niobate by Laser-Induced Fluorescence of Sputtered Atoms" 

V. M. Bermudez, J. W. Hudgens and M. A. Hoffbauer 

Appl. Optics 22, 3681-3683 (1983). DOI: 10.1364/AO.22.003681 PMID: 20407525 

29. "Multiphoton Ionization Spectroscopy of the Hydroxymethyl Radical" 

C. S. Dulcey and J. W. Hudgens 

Bull. Soc. Chim. Belg. 92, 583 (1983). 

28. "Spectroscopy and Detection of Free Radicals with Resonance Enhanced Multiphoton 

Ionization" 

J. W. Hudgens, T. G. DiGiuseppe, C. S. Dulcey and M. C. Lin 

Bull. Soc. Chim. Belg. 92, 582 (1983). 

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27. "Two Photon Resonance Enhanced Multiphoton Ionization and State Assignments of the 

Methyl Radical" 

J. W. Hudgens, T. G. DiGiuseppe and M. C. Lin 

J. Chem. Phys. 79, 571 (1983). DOI: 10.1063/1.445857 

26. "Detection of CH2OH Radicals by Resonance Enhanced Multiphoton Ionization 

C. S. Dulcey and J. W. Hudgens 

J. Phys. Chem. 87, 2296 (1983). DOI: 10.1021/j100236a012 

25. "Resonance Enhanced Multiphoton Ionization of the Trifluoromethyl Radical, CF3" 

M. T. Duignan, J. W. Hudgens and J. R. Wyatt 

Laser Techniques for Extreme Ultraviolet Spectroscopy, T. J. McIlrath and R. R. Freedman, eds., 

American Institute of Physics Conferences Proceedings, New York (1982), Vol. 90, p. 397-399. 

DOI: 10.1063/1.33735 

24. "Multiphoton Ionization of the Trifluoromethyl Radical" 

M. Duignan, J. W. Hudgens and J. R. Wyatt 

J. Phys. Chem. 86, 4156-4161 (1982). DOI: 10.1021/j100218a013 

23. "Laser Physics I: State Selective Excitation" 

J. Pfab, J. Hager, W. Krieger, C. V. Boughton, R. E. Miller, H. Zacharias, M. M. T. Loy, P. A. 

Roland, A. Sudbo, B. E. Lehmann, C. H. Chen, G. S. Hurst, M. G. Payne, R. D. Willis, S. D. 

Kramer, E. E. Marinero, C. T. Rettner, R. N. Zare, H. Rottke, K. H. Welge, C. C. Wang, M. T. 

Myers, D. Zhou, J. W. Hudgens, T. G. DiGiuseppe, M. C. Lin, E. Riedle, H. J. Neusser, E. W. 

Schlag, J. Pfeifler, P. G. Carrick, R. F. Curl, Jr., F. K. Tittel, C. G. Atkins, G. Hancock, R. F. 

Menefee, R. R. Hall, M. J. Berry and D. M. Burland 

Appl. Phys. B 28, 117-123 (1982). DOI: 10.1007/BF00697836 

22. "Multiphoton Ionization and Fragmentation Mechanisms of CS2" 

M. Seaver, J. W. Hudgens and J. J. DeCorpo 

Chem. Phys. 70, 63 (1982). DOI: 10.1016/0301-0104(82)85105-7 

21. "New Electronic States in CH3 Observed Using Multiphoton Ionization" 

T. G. DiGiuseppe, J. W. Hudgens and M. C. Lin 

J. Chem. Phys. 76, 3337 (1982). DOI:10.1063/1.443332 

20. "Multiphoton Ionization of CH3 Radicals in the Gas Phase" 

T. G. DiGiuseppe, J. W. Hudgens and M. C. Lin 

J. Phys. Chem. 86, 36-41 (1982). DOI: 10.1021/j100390a008 

19. "Studies of the Multiphoton Ionization of Organic Phosphonates" 

J. W. Hudgens, technical report to U. S. Army Armament Research and Development Command, 

Chemical Systems Laboratory, Aberdeen Proving Grounds, July 1982. 

18. "Multiphoton Ionization Mass Spectrometry" 

J. J. DeCorpo, J. W. Hudgens, M. Seaver and J. R. Wyatt 

Dynamic Mass Spectrometry, Vol. 6, D. Price and J. F. J. Todd, eds., Heydon & Son, Ltd., London, 

England (1982), Vol. 90, p. 397. ISBN: 978-0855014995 

17. "Discrete and Quasicontinuum Level Fluorescence from Infrared Multiphoton Excited SF6" 

J. W. Hudgens and J. D. McDonald 

J. Chem. Phys. 76, 173 (1982). DOI:10.1063/1.44275 

16. "Detection of Gas Phase Methyl Radicals Using Multiphoton Ionization" 

T. G. DiGiuseppe, J. W. Hudgens and M. C. Lin 

Chem. Phys. Lett. 82, 267-269 (1981). DOI: 10.1016/0009-2614(81)85153-6 

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15. "Selective Multiphoton Ionization of Geometric Isomers: cis- and trans-1,2-Dichloroethene" 

J. W. Hudgens, M. Seaver and J. J. DeCorpo 

J. Phys. Chem. 85, 761 (1981). DOI: 10.1021/j150607a008 

14. "Energy Redistribution Observed in Infrared Multiphoton Excited C2F5Cl" 

J. W. Hudgens and J. D. McDonald 

J. Chem. Phys. 74, 1510-1511 (1981). DOI: 10.1063/1.441172 

13. "Characterization of Multiphoton Mass Spectrometry" 

J. J. DeCorpo, J. W. Hudgens, M. E. Seaver, M. C. Lin, F. E. Saalfeld and J. R. Wyatt 

Advances in Mass Spectrometry, Vol. 8A, A. Quayle, ed., Heyden and Son, Ltd., London, England, 

(1980), p. 133. ISBN: 9780855013288 

12. "ArF Laser Multiphoton Ionization Mass Spectrometry of Organic Molecules" 

M. Seaver, J. W. Hudgens and J. J. DeCorpo 

Int. J. Mass Spectrom. and Ion Phys. 34, 159 (1980). DOI: 10.1016/0020-7381(80)85023-6 

11. "Chemical and Biochemical Applications of Lasers, C. B. Moore, ed." 

J. W. Hudgens 

Applied Optics 19, 262 (1980). 

10. "Infrared Chemiluminescence Investigation of Reactions of Methyl Radicals with Oxygen 

and Fluorine" 

M. G. Moss, J. W. Hudgens and J. D. McDonald 

J. Chem. Phys. 72, 3486 (1980). DOI: 10.1063/1.439611 

9. "Infrared Laser Driven Reverse Internal Conversion in Carbonyl Fluoride" 

J. W. Hudgens, J. R. Durant, Jr., D. J. Bogan and R. A. Coveleskie 

J. Chem. Phys. 70, 5906-5907 (1979). DOI: 10.1063/1.437420 

8. "Production, Detection and Reactions of the CH Radical" 

J. E. Butler, L. P. Goss, M. C. Lin and J. W. Hudgens 

Chem. Phys. Lett. 63, 104-107 (1979). DOI: 10.1016/0009-2614(79)80467-4 

7. "Observation of OH(v=0,1) in the Reactions of O(3P) with HCl(v=0,1,2)" 

J. E. Butler, J. W. Hudgens, M. C. Lin and G. K. Smith 

Chem. Phys. Lett. 63, 216-220 (1979). DOI: 10.1016/0009-2614(78)80280-2 

6. "Studies of the Navy-ARPA Chemical Laser (NACL) Exhaust" 

J. J. DeCorpo, J. W. Hudgens, R. S. Olfky and J. R. Wyatt, R. C. Clark and J. R. Thompson 

NRL Formal Report No. 8273, 22 Dec 1978. Identifier-ark ark:/13960/t24b98h2f 

5. "Chemical Applications of Lasers" 

A. P. Baronavski, J. E. Butler, J. W. Hudgens, M. C. Lin, J. R. McDonald and M. E. Umstead 

Advances in Laser Chemistry, A. Zewail, ed., Proceedings of the Conference on Advances in Laser 

Chemistry, California Institute of Technology 20-22 MAR 1978, p. 62-70. 

ISBN: 978-3-642-67054-1 

4. "In Situ Studies of the Infrared Multiple Photon Laser Induced Decomposition of CF2Cl2 and 

CFCl3" 

J. W. Hudgens 

J. Chem. Phys. 68, 777 (1978). DOI: 10.1063/1.435728 

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3. "Infrared Chemiluminescence Study of the Reaction of Translationally Hot Hydrogen Atoms 

with ICl" 

J. W. Hudgens and J. D. McDonald 

J. Chem. Phys. 67, 3401-3403 (1977). DOI: 10.1063/1.435294 

2. "Infrared Chemiluminescence Studies of the Reaction of Oxygen Atoms with CS2 and CS" 

J. W. Hudgens, J. T. Gleaves and J. D. McDonald 

J. Chem. Phys. 64, 2528 (1976). DOI: 10.1063/1.432502 

1. "Infrared Chemiluminescence Studies of the Reaction of Fluorine Atoms with 

Monosubstituted Ethylene Compounds" 

J. G. Moehlmann, J. T. Gleaves, J. W. Hudgens and J. D. McDonald 

J. Chem. Phys. 60, 4790 (1974). DOI: 10.1063/1.1680982 

Patents 

2. "Method of Mass Spectrometry (A photochemically induced charge exchange ionizer)" 

J. W. Hudgens 

U. S. Pat. Off. File # 506090, 20 June 1983. 

1. "Intra-Cavity Total Reflection for High Sensitivity Measurement of Optical Properties" 

A. C. R. Pipino and J. W. Hudgens 

U. S. Pat. Off. Patent # 5943136, 24 August 1999. 

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