2025

[42] L. Ganner, G. A. Garcia, M. Schwell, M. Kappe, L. Nahon, E. Gruber, H. R. Hróðmarsson. “Experimental VUV Photoionization of C₇₀ and vibrationally resolved spectra of the excited electronic states of the C₇₀⁺ cation Analogs” Accepted in ACS Earth & Space Chemistry. pdf

[41] L. Ganner, G. Schöpfer, A. Ebenbichler, S. Bergmeister, M. Ončák, H. R. Hróðmarsson, E. Gruber. “Electronic Spectroscopy of C₆₀⁺ and Its Analogs C₆₀H₂O⁺, C₆₀H⁺ , C₆₀D⁺ , and C₆₀Mg⁺” ApJ, 993, 47. pdf

[40] M. M. Patch, R. McClish, S. Panchagnula, D. B. Rap, S. Banhatti, H. R. Hróðmarsson, S. Brunken, H. Linnartz, A. G. G. M. Tielens, J. Bouwman. “Radical isomerization upon dissociative electron ionization of anthracene and phenanthrene” JACS, 147, 34508. pdf

[39] H. R. Hróðmarsson, L. Verstraete, E. Dartois, J. Fréreux, O. Lacinbala, L. Nahon, G.A. Garcia, T. Pino, P. Bréchignac. “Photoionization of small neutral polycyclic aromatic hydrocarbons. Testing photoelectric models of interstellar dust” A&A. 698, A202. pdf

[38] H. R. Hróðmarsson, I. Aleman, A. Candian, S. Wiersma, J. Palotás, D. Dubois, A. Sidhu, D. Loru, P. Sundarajan, E. Sciamma-O’Brien, A.G.G.M. Tielens. “The AstroPAH 10 Years of Science Review” Space Sci. Rev., 221, 42. pdf

[37] A. Ebenbichler, M. Oncak, N. Przybilla, H. R. Hróðmarsson, J. V. Smoker, R. Lallement, A. Farhang, C. Bhatt, J. Cami, M. Cordiner, P. Ehrenfreund, N. L. J. Cox, J. Th. van Loon, B. Foing. “The EDIBLES survey X. The 6196 Å diffuse interstellar band: Identification of side DIBs as indication for a small carrier molecule” A&A. 695, A212. pdf 

2024

[36] K. L. Chubb, S. Robert, C. Sousa-Silva, S. N. Yurchenko, N. F. Allard, V. Boudon, J. Buldyreva, B. Bultel, A. Coustenis, A. Foltynowicz, I. E. Gordon, R. J. Hargreaves, C. Helling, C. Hill, H. R. Hróðmarsson, T. Karman, H. Lecoq-Molinos, A. Migliorini, M. Rey, C. Richard, I. Sadiek, F. Schmidt, A. Sokolov, S. Stefani, J. Tennyson, O. Venot, S. O. M. Wright, R. Arenales-Lope, J. K. Barstow, A. Bocchieri, N. Carrasco, D. Dubey, O. Egorov, A. Garcia Munoz, L. Gkouvelis, F. Grubel, P. G. J. Irwin, A. Knízek, D. A. Lewis, M. G. Lode, S. Ma, Z Martis, K. Molaverdikhani, G. Morello, A. Nikitin, E. Panek, M. Rengel, G. Rinaldi, J. W. Skinner, G. Tinetti, T. A. van Kempen, J. Yang, T. Zingales. “Data availability and requirements relevant for the Ariel space mission and other exoplanet atmosphere applications” RASTAI 3, 636 (2024). pdf

[35] H. R. Hróðmarsson, G. A. Garcia, L. Nahon, L. Bourehil, B. Gans, S. Boyé-Péronne, J.-C. Guillemin, J.-C. Loison. “The Isomer Distribution of C₆H₆ Products from the Propargyl Radical Gas-Phase Recombination Investigated by Threshold-Photoelectron Spectroscopy”. Comm. Chem. 7:156 (2024). pdf

[34] S. Panchagnula, J. Kamer, A. Candian, H. R. Hróðmarsson, H. Linnartz, J. Bouwman, A. G. G. M. Tielens. “Laser-Induced Fragmentation of Coronene Cations”. PCCP, 26, 18557 (2024). pdf

[33] S. R. Domingos, D. S. Tikhonov, A. L. Steber, P. Eschenbach, S. Gruet, H. R. Hróðmarsson, K. Martin, G. A. Garcia, L. Nahon, J. Neugebeauer, N. Avarvari, M. Schnell. “Evolution of the ionization energy with the stepwise growth of chiral clusters of [4]helicene”. Nat. Comm. 15, 4928 (2024). pdf

[32] H. R. Hróðmarsson, M. Rapacioli, F. Spiegelman, G. A. Garcia, J. Bouwman, L. Nahon, H. Linnartz. “Probing the electronic structure and ground state symmetry of gas phase C₆₀⁺ via VUV photoionization and comparison with theory”. JCP, 160, 164314 (2024). pdf

[31] VUV Photoionization and Unimolecular Decomposition of 2-Aminoproprionitrile in the Gas Phase. H. R. Hróðmarsson, M. Schwell, N. Fray, J.-C. Guillemin, M. Hochlaf, E.-L. Zins. ApJ, 964, 26 (2024). pdf

[30] Photoionization of Nitrile-Substituted Naphthalene and Benzene: Photostability and Photoelectric Gas Heating. M. Roy Chowdhury, G. A. Garcia, H. R. Hróðmarsson, J.-C. Loison, L. Nahon. ApJ, 963, 29 (2024). pdf

2023

[29] Photodissociation and photoionization of molecules of astronomical interest: Updates to the Leiden photodissociation & photoionization cross section database. H. R. Hróðmarsson & E. F. van Dishoeck. A&A, 675, A25 (2023). pdf

[28] Fragmentation of the PAH cations of isoviolanthrene and dicoronylene: A case made for interstellar cyclo[n]carbons as products of universal fragmentation processes. H. R. Hróðmarsson, J. Bouwman, A. G. G. M. Tielens, H. Linnartz. IJMS, 485, 116996 (2023). pdf

2022

[27] Similarities and dissimilarities in the fragmentation of polycyclic aromatic hydrocarbon cations: A case study involving three dibenzopyrene isomers. H. R. Hróðmarsson, J. Bouwman, A. G. G. M. Tielens, H. Linnartz. IJMS, 476, 116834 (2022). pdf

2021

[26] High resolution threshold photoelectron spectrum and photoionization dynamics of S₂ up to 15.0 eV. H. R. Hróðmarsson, G. A. Garcia, L. Nahon, J.-C. Loison, B. Gans. JMS, 381, 111533 (2021). pdf

[25] Threshold photoelectron spectroscopy of the CH₂I, CHI and CI radicals. D. V. Chicharro, H. R. Hróðmarsson, A. Bouallagui, A. Zanchet, J.-C. Loison, G. A. Garcia, A. García-Vela, L. Banares, S. M. Poullain. JPCA, 125, 6122 (2021). pdf

[24] Photoionization cross section of the NH₂ free radical in the 11.1-15.7 eV energy range. O. Harper, B. Gans, J.-C. Loison, G. Garcia, H. R. Hróðmarsson, S. Boyé-Péronne.  JPCA, 125 (13), 2764 (2021). pdf

[23] Five Birds With One Stone: Photoelectron Photoion Coincidence Unveils Rich Phthalide Pyrolysis Chemistry. J. Bouwman, H. R. Hróðmarsson, G. B. Ellisson, A. Bodi, P. Hemberger. JPCA, 125 (8), 1738 (2021). pdf

2020

[22] Unimolecular Decomposition of Methyl Ketene and its Dimer in the Gas Phase: Theory and Experiment. I. Derbali, H. R. Hróðmarsson, M. Schwell, Y. Benilan, L. Poisson, M. Hochlaf, M. E. Alikhani, J.-C. Guillemin, E.-L. Zins. PCCP, 22, 20394 (2020). pdf

[21] The effect of autoionization on the HBr⁺ X ²Π_3/2,1/2 state photoelectron angular distributions. H. R. Hróðmarsson, B. Gans, S. Boyé-Péronne, G. Garcia, L. Nahon, S. Pratt, D. M. P. Holland. Chem Phys. 539, 110961 (2020). pdf

[20] Selective Identification of Cyclopentaring-Fused PAHs and  Side-Substituted PAHs in a Low Pressure Premixed Sooting Flame by Photoelectron Photoion Coincidence Spectroscopy. X. Mercier, A. Faccinetto, S. Batut, G. Vanhove, D. K. Bozanic, H. R. Hróðmarsson, G. A. Garcia, L. Nahon. PCCP, 22, 15926 (2020). pdf

[19] Erratum: “Quantifying the photoionization cross section of the hydroxyl radical” [J. Chem. Phys. 150, 141103 (2019)]. O. J. Harper, M. Hassenfratz, J.-C. Loison, G. A. Garcia, N. de Oliveira, H. R. Hróðmarsson, S. T. Pratt, S. Boyé-Péronne, B. Gans. JCP, 152, 189903 (2020). pdf

[18] VUV Photoionization Dynamics of the C₆₀ Buckminsterfullerene: 2D-Matrix Photoelectron Spectroscopy in an Astrophysical Context. H. R. Hróðmarsson, G. A. Garcia, H. Linnartz, L. Nahon. PCCP, 22, 13880 (2020). pdf

[17] To see C₂: Single-Photon Ionization of the Dicarbon Molecule. O. J. Harper, S. Boyé-Péronne, G. A. Garcia, H. R. Hróðmarsson, J.-C. Loison, B. Gans. JCP, 152, 041105 (2020). pdf

2019

[16] The Absolute Photoionization Cross Section of the Mercapto Radical (SH) from Threshold up to 15.0 eV. H. R. Hróðmarsson, G. A. Garcia, L. Nahon, J.-C. Loison, B. Gans. PCCP, 21, 25907 (2019). pdf

[15] Threshold Photelectron Spectrum of the Anilino Radical. H. R. Hróðmarsson, G. A. Garcia, L. Nahon, B. Gans, J.-C. Loison. J. Phys. Chem. A. 123, 42, 9193 (2019). pdf

[14] Threshold Photelectron Spectrum of the CH₂OO Criegee Intermediate. D. Chicharro, S. M. Poullain, L. Banares, H. R. Hróðmarsson, G. A. Garcia, J.-C. Loison. PCCP,  21, 12763 (2019). pdf

[13] Quantifying the Photoionization Cross Section of the Hydroxyl Radical. O. J. Harper, M. Hassenfratz, J.-C. Loison, G. A. Garcia, N. de Oliveira, H. R. Hróðmarsson, S. T. Pratt, S. Boyé-Péronne, B. Gans. JCP, 150, 141103 (2019). pdf

[12] Isotope Effects in the Predissociation of Excited States of N₂⁺ Produced by Photoionization of ¹⁴N₂ and ¹⁵N₂ at Energies between 24.2 and 25.6 eV. H. R. Hróðmarsson, R. Thissen, D. Dowek, G. A. Garcia, L. Nahon, T. R. Govers. Front. Chem. 7, 222 (2019). pdf

[11] Valence-Shell Photoionization of the C₄H₅ Radical. H. R. Hróðmarsson, J.-C. Loison, U. Jacovella, D. Holland, S. Boyé-Péronne, B. Gans, G. Garcia,  L. Nahon, S. Pratt. J. Phys. Chem. A. 123, 8, 1521 (2019). pdf

[10] Photoionization and dissociative photoionization of propynal in the gas phase: Theory and experiment; I. Derbali, H. R. Hróðmarsson, Z. Gouid, M. Schwell, M.-C. Gazeau, J.-C. Guillemin, M. Hochlaf, M. E. Alikhani, E.-L. Zins. PCCP, 21, 14053 (2019). pdf

2018

[9] Electron Interactions with the Heteronuclear Carbonyl Precursor (H₂FeRu₃(CO)₁₃): From Fundamental Gas Phase  and Surface Science Studies to Focused Electron Beam Induced Deposition; R. Kumar T P, P. Weirich, L. Hrachowina, M. Hanefeld, R. Björnsson, H. R. Hróðmarsson, S. Barth, D. H. Fairbrother, M. Huth, O. Ingólfsson. Beilstein J. Nanotechnol. 9, 555 (2018). pdf

2017

[8] Excitation Dynamics Involving Homogenenous Multistate Interactions:
One and Two Color VMI and REMPI of HBr; H. R. Hróðmarsson, A. Kartakoullis, D. Zaouris, P. Glodic, H. Wang, P. Samartzis, Á. Kvaran. PCCP, 19, 11354 (2017). pdf

2016

[7] Corrigendum to “New REMPI observations and analyses for Rydberg and ion-pair states of HI” [J. Mol. Spectrosc. 290 (2013) 5–12]; H. R. Hróðmarsson, H. Wang, Á. Kvaran, JMS, 324, 56 (2016). pdf

2015

[6] Revealing photofragmentation dynamics through interactions between Rydberg states: REMPI of HI as a case study; H. R. Hróðmarsson, Á. Kvaran. PCCP, 17, 32517 (2015). pdf

[5] State Interactions and Illumination of Hidden States through Perturbations and Observations of New States: High Energy Resonance Enhanced Multiphoton Ionization of HI; H. R. Hróðmarsson, H. Wang, Á. Kvaran. JCP, 142, 244312 (2015). pdf

[4] Rydberg and valence state excitation dynamics: A velocity map imaging study involving the E – V state interaction in HBr; D. Zaouris, A. Kartakoullis, P. Glodic, P. Samartzis, H. R. Hróðmarsson, Á. Kvaran. PCCP, 17, 10468 (2015). pdf

2014

[3] Photofragmentation, state interaction, and energetics of Rydberg and ion-pair states: Resonance enhanced multiphoton ionization of HI; H. R. Hróðmarsson, H. Wang, Á. Kvaran. JCP, 140, 244304 (2014). pdf

2013

[2] New REMPI observations and analyses for Rydberg and ion-pair states of HI; H. R. Hróðmarsson, H. Wang, Á. Kvaran. JMS, 290, 5 (2013). pdf

2012

[1] Photofragmentations, state interactions, and energetics of Rydberg and ion-pair states: Two-dimensional resonance enhanced multiphoton ionization of HBr via singlet-, triplet-, Ω = 0 and 2 states; J. Long, H. R. Hróðmarsson, H. Wang, Á. Kvaran. JCP,  136, 314315 (2012). pdf