Universität zu Köln

Assaf, Emmanuel ORCID: 0000-0002-1549-5988, Asvany, Oskar, Votava, Ondrej, Batut, Sebastien, Schoemaecker, Coralie ORCID: 0000-0001-7016-9432 and Fittschen, Christa ORCID: 0000-0003-0932-432X (2017). Measurement of line strengths in the (A)over-tilde (2)A' <- (X)over-tilde2A '' transition of HO2 and DO2. J. Quant. Spectrosc. Radiat. Transf., 201. S. 161 - 171. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1879-1352

Asvany, Oskar, Bruenken, Sandra, Kluge, Lars and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2014). COLTRAP: a 22-pole ion trapping machine for spectroscopy at 4 K. Appl. Phys. B-Lasers Opt., 114 (1-2). S. 203 - 212. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1432-0649

Asvany, Oskar, Krueger, Hanna and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2020). Simple O-ring sealed Brewster-angle window for ultrahigh vacuum applications. J. Vac. Sci. Technol. B, 38 (4). MELVILLE: A V S AMER INST PHYSICS. ISSN 2166-2746

Asvany, Oskar, Markus, Charles R., Roucou, Anthony, Schlemmer, Stephan, Thorwirth, Sven and Lauzin, Clement (2021). The fundamental rotational transition of NO+. J. Mol. Spectrosc., 378. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Asvany, Oskar, Markus, Charles R., Salomon, Thomas, Schmid, Philipp C., Banhatti, Shreyak, Bruenken, Sandra, Lipparini, Filippo ORCID: 0000-0002-4947-3912, Gauss, Juergen and Schlemmer, Stephan (2020). High-resolution rovibrational spectroscopy of c-C3H2+: The v(7) C-H antisymmetric stretching band. J. Mol. Struct., 1214. AMSTERDAM: ELSEVIER. ISSN 1872-8014

Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2021). Rotational action spectroscopy of trapped molecular ions. Phys. Chem. Chem. Phys., 23 (47). S. 26602 - 26623. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

Asvany, Oskar, Schlemmer, Stephan ORCID: 0000-0002-1421-7281, Szidarovszky, Tamas ORCID: 0000-0003-0878-5212 and Csaszar, Attila G. (2019). Infrared Signatures of the HHen+ and DHen+ (n=3-6) Complexes. J. Phys. Chem. Lett., 10 (18). S. 5325 - 5336. WASHINGTON: AMER CHEMICAL SOC. ISSN 1948-7185

Asvany, Oskar, Schlemmer, Stephan, van der Avoird, Ad, Szidarovszky, Tamas and Csaszar, Attila G. (2021). Vibrational spectroscopy of H2He+ and D2He+. J. Mol. Spectrosc., 377. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Asvany, Oskar, Thorwirth, Sven, Redlich, Britta and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2018). Spectroscopy of the low-frequency vibrational modes of CH3+ isotopologues. J. Mol. Spectrosc., 347. S. 1 - 7. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Asvany, Oskar, Yamada, Koichi M. T., Bruenken, Sandra, Potapov, Alexey and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2015). Experimental ground-state combination differences of CH5+. Science, 347 (6228). S. 1346 - 1350. WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE. ISSN 1095-9203

Asvany, Oskar, Yamada, Koichi M. T., Bruenken, Sandra, Potapov, Alexey and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2015). Experimental ground-state combination differences of CH5+. Science, 347 (6228). S. 1346 - 1350. WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE. ISSN 1095-9203

Brackertz, Stefan, Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2017). Searching for new symmetry species of CH5+ - From lines to states without a model. J. Mol. Spectrosc., 342. S. 73 - 83. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Bruenken, Sandra, Kluge, Lars, Stoffels, Alexander, Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2014). LABORATORY ROTATIONAL SPECTRUM OF l-C3H+ AND CONFIRMATION OF ITS ASTRONOMICAL DETECTION. Astrophys. J. Lett., 783 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 2041-8213

Bruenken, Sandra, Sipilae, Olli, Chambers, Edward T., Harju, Jorma ORCID: 0000-0002-1189-9790, Caselli, Paola ORCID: 0000-0003-1481-7911, Asvany, Oskar, Honingh, Cornelia E., Kaminski, Tomasz ORCID: 0000-0001-8541-8024, Menten, Karl M., Stutzki, Juergen and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2014). H2D+ observations give an age of at least one million years for a cloud core forming Sun-like stars. Nature, 516 (7530). S. 219 - 230. LONDON: NATURE PUBLISHING GROUP. ISSN 1476-4687

Csaszar, Attila G., Szidarovszky, Tamas ORCID: 0000-0003-0878-5212, Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2019). Fingerprints of microscopic superfluidity in HHen plus clusters. Mol. Phys., 117 (9-12). S. 1559 - 1584. ABINGDON: TAYLOR & FRANCIS LTD. ISSN 1362-3028

Domenech, Jose L., Jusko, Pavol, Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2018). The First Laboratory Detection of Vibration-rotation Transitions of (CH+)-C-12 and (CH+)-C-13 and Improved Measurement of Their Rotational Transition Frequencies. Astrophys. J., 857 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

Domenech, Jose L., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2017). Accurate Frequency Determination of Vibration-Rotation and Rotational Transitions of SiH+. Astrophys. J., 849 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

Domenech, Jose L., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2018). Accurate Rotational Rest Frequencies for Ammonium Ion Isotopologues. Astrophys. J., 866 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

Fanghaenel, Sven, Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2017). Optimization of RF multipole ion trap geometries. J. Mol. Spectrosc., 332. S. 124 - 134. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Gaertner, Sabrina, Krieg, Juergen, Klemann, Andre, Asvany, Oskar, Bruenken, Sandra and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2013). High-Resolution Spectroscopy of CH2D+ in a Cold 22-Pole Ion Trap. J. Phys. Chem. A, 117 (39). S. 9975 - 9985. WASHINGTON: AMER CHEMICAL SOC. ISSN 1089-5639

Harju, Jorma ORCID: 0000-0002-1189-9790, Sipiae, Olli, Brunken, Sandra ORCID: 0000-0001-7175-4828, Schlemmer, Stephan ORCID: 0000-0002-1421-7281, Caselli, Paola, Juvela, Mika ORCID: 0000-0002-5809-4834, Menten, Karl M., Stutzki, Juergen, Asvany, Oskar, Kaminski, Tomasz ORCID: 0000-0001-8541-8024, Okada, Yoko ORCID: 0000-0002-6838-6435 and Higgins, Ronan (2017). Detection of Interstellar Ortho-D2H+ with SOFIA. Astrophys. J., 840 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

Jensen, Per, Oomens, Jos ORCID: 0000-0002-2717-1278, Asvany, Oskar, Thorwirth, Sven and Mueller, Holger S. P. (2021). Laboratory spectroscopy for astrophysics: Festschrift for Stephan Schlemmer. J. Mol. Spectrosc., 379. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Jusko, Pavol, Asvany, Oskar, Wallerstein, Ann-Christin, Bruenken, Sandra and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2014). Two-Photon Rotational Action Spectroscopy of Cold OH- at 1 ppb Accuracy. Phys. Rev. Lett., 112 (25). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

Jusko, Pavol, Bruenken, Sandra, Asvany, Oskar, Thorwirth, Sven, Stoffels, Alexander, van der Meer, Lex, Berden, Giel ORCID: 0000-0003-1500-922X, Redlich, Britta, Oomens, Jos ORCID: 0000-0002-2717-1278 and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2019). The FELion cryogenic ion trap beam line at the FELIX free-electron laser laboratory: infrared signatures of primary alcohol cations. Faraday Discuss., 217. S. 172 - 203. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1364-5498

Jusko, Pavol, Konietzko, Christoph, Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2016). Frequency comb assisted measurement of fundamental transitions of cold H-3(+), H2D+ and D2H+. J. Mol. Spectrosc., 319. S. 55 - 59. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Jusko, Pavol, Stoffels, Alexander, Thorwirth, Sven, Bruenken, Sandra, Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2017). High-resolution vibrational and rotational spectroscopy of CD2H+ in a cryogenic ion trap. J. Mol. Spectrosc., 332. S. 59 - 67. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Jusko, Pavol, Toepfer, Matthias, Mueller, Holger S. P., Ghosh, Pradip N., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2017). Double resonance rotational action spectroscopy of cold H2D+ and D2H+. J. Mol. Spectrosc., 332. S. 33 - 38. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Kleiner, Isabelle, Gou, Qian, Nguyen, Ha Vinh Lam ORCID: 0000-0002-5493-8905, Hirota, Eizi, Baba, Masaaki, Schlemmer, Stephan, Asvany, Oskar, Mueller, Holger and Ilyushin, Vadim (2021). Collection of memories of Jon T. Hougen. J. Mol. Struct., 1229. AMSTERDAM: ELSEVIER. ISSN 1872-8014

Kluge, Lars, Gaertner, Sabrina, Bruenken, Sandra, Asvany, Oskar, Gerlich, Dieter and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2012). Transfer of a proton between H-2 and O-2. Philos. Trans. R. Soc. A-Math. Phys. Eng. Sci., 370 (1978). S. 5041 - 5055. LONDON: ROYAL SOC. ISSN 1471-2962

Kohguchi, Hiroshi ORCID: 0000-0001-9684-1258, Jusko, Pavol, Yamada, Koichi M. T., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2018). High-resolution infrared spectroscopy of O2H+ in a cryogenic ion trap. J. Chem. Phys., 148 (14). MELVILLE: AMER INST PHYSICS. ISSN 1089-7690

Markus, Charles R., Asvany, Oskar, Salomon, Thomas, Schmid, Philipp C., Brunken, Sandra ORCID: 0000-0001-7175-4828, Lipparini, Filippo ORCID: 0000-0002-4947-3912, Gauss, Juergen and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2020). Vibrational Excitation Hindering an Ion-Molecule Reaction: The c-C3H2+ - H-2 Collision Complex. Phys. Rev. Lett., 124 (23). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

Markus, Charles R., Thorwirth, Sven, Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2019). High-resolution double resonance action spectroscopy in ion traps: vibrational and rotational fingerprints of CH2NH2+. Phys. Chem. Chem. Phys., 21 (48). S. 26406 - 26413. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

McGuire, Brett A., Asvany, Oskar, Brunken, Sandra ORCID: 0000-0001-7175-4828 and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2020). Laboratory spectroscopy techniques to enable observations of interstellar ion chemistry. Nat. Rev. Phys., 2 (8). S. 402 - 411. LONDON: SPRINGERNATURE. ISSN 2522-5820

Salomon, Thomas, Brackertz, Stefan ORCID: 0000-0001-6618-092X, Asvany, Oskar, Savic, Igor ORCID: 0000-0002-9954-7457, Gerlich, Dieter, Harding, Michael E., Lipparini, Filippo ORCID: 0000-0002-4947-3912, Gauss, Juergen, van der Avoird, Ad ORCID: 0000-0003-1856-240X and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2022). The He-H-3(+) complex. II. Infrared predissociation spectrum and energy term diagram. J. Chem. Phys., 156 (14). MELVILLE: AIP Publishing. ISSN 1089-7690

Salomon, Thomas, Domenech, Jose L., Schmid, Philipp C., Michael, Ernest A., Schlemmer, Stephan and Asvany, Oskar (2021). Rovibrational spectroscopy of the CH+-He and CH+-He-4 complexes. J. Mol. Spectrosc., 377. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Salomon, Thomas ORCID: 0000-0003-4068-7444, Toepfer, Matthias, Schreier, Philipp, Schlemmer, Stephan ORCID: 0000-0002-1421-7281, Kohguchi, Hiroshi, Surin, Leonid ORCID: 0000-0002-5816-3166 and Asvany, Oskar (2019). Double resonance rotational spectroscopy of He-HCO+. Phys. Chem. Chem. Phys., 21 (7). S. 3440 - 3446. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

Savic, Igor ORCID: 0000-0002-9954-7457, Gerlich, Dieter, Asvany, Oskar, Jusko, Pavol and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2015). Controlled synthesis and analysis of He-H-3(+) in a 3.7 K ion trap. Mol. Phys., 113 (15-16). S. 2320 - 2333. ABINGDON: TAYLOR & FRANCIS LTD. ISSN 1362-3028

Schmid, Philipp C., Asvany, Oskar, Salomon, Thomas, Thorwirth, Sven and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2022). Leak-Out Spectroscopy, A Universal Method of Action Spectroscopy in Cold Ion Traps. J. Phys. Chem. A, 126 (43). S. 8111 - 8118. WASHINGTON: AMER CHEMICAL SOC. ISSN 1520-5215

Schmid, Philipp C., Thorwirth, Sven, Endres, Christian P., Toepfer, Matthias, Sanchez-Monge, Alvaro, Schwoerer, Andreas, Schilke, Peter, Schlemmer, Stephan and Asvany, Oskar (2022). Rotational Rest Frequencies and First Astronomical Search of Protonated Methylamine. Front. Astron. Space Sci., 8. LAUSANNE: FRONTIERS MEDIA SA. ISSN 2296-987X

Thorwirth, Sven ORCID: 0000-0001-8200-6710, Asvany, Oskar, Harding, Michael E., Jusko, Pavol, McCarthy, Michael C., Bruenken, Sandra and Schlemmer, Stephan (2022). Infrared action spectroscopy of fundamental nitrilium ions: Protonated vinyl- and ethyl cyanide. J. Mol. Spectrosc., 386. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

Thorwirth, Sven ORCID: 0000-0001-8200-6710, Harding, Michael E., Asvany, Oskar, Bruenken, Sandra, Jusko, Pavol, Lee, Kin Long Kelvin ORCID: 0000-0002-1903-9242, Salomon, Thomas, McCarthy, Michael C. and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2020). Descendant of the X-ogen carrier and a 'mass of 69': infrared action spectroscopic detection of HC3O+ and HC3S+. Mol. Phys., 118 (19-20). ABINGDON: TAYLOR & FRANCIS LTD. ISSN 1362-3028

Toepfer, Matthias, Jusko, Pavol, Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2016). Double resonance rotational spectroscopy of CH2D+. Astron. Astrophys., 593. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

Toepfer, Matthias, Salomon, Thomas, Kohguchi, Hiroshi ORCID: 0000-0001-9684-1258, Dopfer, Otto, Yamada, Koichi M. T., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2018). Double Resonance Rotational Spectroscopy of Weakly Bound Ionic Complexes: The Case of Floppy CH3+-He. Phys. Rev. Lett., 121 (14). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

Toepfer, Matthias, Schmid, Philipp C., Kohguchi, Hiroshi, Yamada, Koichi M. T., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2019). Infrared photodissociation of cold CH3+-He-2 complexes. Mol. Phys., 117 (9-12). S. 1481 - 1486. ABINGDON: TAYLOR & FRANCIS LTD. ISSN 1362-3028

Töpfer, Matthias, Jensen, Anders, Nagamori, Keigo, Kohguchi, Hiroshi, Szidarovszky, Tamas, Csaszar, Attila G., Schlemmer, Stephan ORCID: 0000-0002-1421-7281 and Asvany, Oskar (2020). Spectroscopic signatures of HHe2+ and HHe3+. Phys. Chem. Chem. Phys., 22 (40). S. 22885 - 22889. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

Yamada, Koichi M. T., Asvany, Oskar and Schlemmer, Stephan (2022). K-type doubling in the rotational spectrum of CH3+-He: A group theoretical explanation. J. Mol. Spectrosc., 388. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X