Person

Research Interests

• Molecular Physics
• Spectroscopy, specific projects: THz spectroscopy (superlattice spectrometer),
  mm spectroscopy (solid state spectrometer, intracavity OROTRON),
  IR spectroscopy (OPO laser system)
• Collision Dynamics
• Cold Collisions
• Astrochemistry

News

Teaching

CV

Recent Publications

2012

• A KInetic Database for Astrochemistry (KIDA)
  Wakelam, V. and Herbst, E. and Loison, J.-C. and Smith, I. W. M. and Chandrasekaran, V. and Pavone, B. and Adams, N. G. and Bacchus-Montabonel, M.-C. and Bergeat, A. and Béroff, K. and Bierbaum, V. M. and Chabot, M. and Dalgarno, A. and van Dishoeck, E. F. and Faure, A. and Geppert, W. D. and Gerlich, D. and Galli, D. and Hébrard, E. and Hersant, F. and Hickson, K. M. and Honvault, P. and Klippenstein, S. J. and Le Picard, S. and Nyman, G. and Pernot, P. and Schlemmer, S. and Selsis, F. and Sims, I. R. and Talbi, D ...
  Astrophys. J., Suppl. Ser. 199, Art. No. 21 (2012)
• The quest for complex molecules in space: laboratory spectroscopy of n-butyl cyanide, n-C₄H₉CN, in the millimeter wave region and its astronomical search in Sagittarius B2(N)
  Ordu, M. H. and Müller, H. S. P. and Walters, A. and Nuñez, M. and Lewen, F. and Belloche, A. and Menten, K. M. and Schlemmer, S.
  Astron. Astrophys. 541, Art. No. A121 (2012)
• Far infrared Fourier-transform spectroscopy of mono-deuterated hydrogen peroxide HOOD
  D. Herberth, O. Baum, O. Pirali, P. Roy, S. Thorwirth, K. M. T. Yamada, S. Schlemmer, and T. F. Giesen
  J. Quant. Spectrosc. Radiat. Transfer 113, 1127–1133 (2012)
• Millimetre-wave spectrum of anti-¹³C₁ and ¹³C₂ isotopologues of ethanol
  A. Bouchez, A. Walters, H. S. P. Müller, M. Ordu, F. Lewen, M. Koerber, S. Bottinelli, C. P. Endres, and S. Schlemmer
  J. Quant. Spectrosc. Radiat. Transfer 113, 1148–1154 (2012)

2011

• Die entscheidende Rolle der Wasserstoffbildung bei der Sternentstehung im frühen Universum
  S. Schlemmer
  Angew. Chem. 123, 2262–2263 (2011)
• H₂ Generation in the Early Universe Governs the Formation of the First Stars
  S. Schlemmer
  Angew. Chem. Int. Ed. 50, 2214–2215 (2011)
• Rotational Spectroscopy, Dipole Moment and ¹⁴N Nuclear Hyperfine Structure of iso-Propyl Cyanide
  H. S. P. Müller, A. Coutens, A. Walters, J.-U. Grabow, and S. Schlemmer
  J. Mol. Spectrosc. 267, 100–107 (2011)
• A continuous-wave optical parametric oscillator around 5 μm wavelength for high-resolution spectroscopy
  J. Krieg, A. Klemann, I. Gottbehüt, S. Thorwirth, T. F. Giesen, S. Schlemmer
  Rev. Sci. Instrum. 82, 063105 (2011)
• Millimeter-wave Study of the CH₄–CO Complex: New Measurements with OROTRON Spectrometer
  A. V. Potapov, A. A. Dolgov, V. A. Panfilov, L. A. Surin, and S. Schlemmer
  J. Mol. Spectrosc. 268, 112–114 (2011)
• High-resolution OPO spectroscopy of Si₂C₃ at 5 μm: Observation of hot band transitions associated with ν₃
  S. Thorwirth, J. Krieg, V. Lutter, I. Keppeler, S. Schlemmer, M. E. Harding, J. Vázquez, and T. F. Giesen
  J. Mol. Spectrosc. 270, 75-78 (2011)
• Submillimeter-wave Spectroscopy of the K = 2–1 Subband of the Ne–CO Complex
  A. V. Potapov, L. A. Surin, S. Schlemmer, T. F. Giesen
  J. Mol. Spectrosc. 270, 116–119 (2011)

2010

• Modelling line emission of deuterated H₃⁺ from prestellar cores
  Sipilä, O. and Hugo, E. and Harju, J. and Asvany, O. and Juvela, M. and Schlemmer, S.
  Astron. Astrophys. 509, Art-No. A26 (2010)
• Quantum-induced symmetry breaking explains infrared spectra of CH₅⁺ isotopologues
  Ivanov, S. D. and Asvany, O. and Witt, A. and Hugo, E. and Mathias, G. and Redlich, B. and Marx, D. and Schlemmer, S.
  Nature Chem. 2, 298–302 (2010)
• The ν₅ antisymmetric stretching mode of linear C₇ Revisited in High Resolution
  J. Krieg, V. Lutter, F.-X. Hardy, S. Schlemmer, and T. F. Giesen
  J. Chem. Phys. 132, Art.-No. 224306 (2010)
• Rotational study of carbon monoxide isotopologues in small ⁴He clusters
  P. L. Raston, Y. Xu, W. Jäger, A. V. Potapov, L. A. Surin, B. S. Dumesh and S. Schlemmer
  Phys. Chem. Chem. Phys. 12, 8260–8267 (2010)
• Virtual atomic and molecular data centre
  Dubernet, M. L. and Boudon, V. and Culhane, J. L. and Dimitrijevic, M. S. and Fazliev, A. Z. and Joblin, C. and Kupka, F. and Leto, G. and Le Sidaner, P. and Loboda, P. A. and Mason, H. E. and Mason, N. J. and Mendoza, C. and Mulas, G. and Millar, T. J. and Nu\ nez, L. A. and Perevalov, V. I. and Piskunov, N. and Ralchenko, Y. and Rixon, G. and Rothman, L. S. and Roueff, E. and Ryabchikova, T. A. and Ryabtsev, A. and Sahal-Bréchot, S. and Schmitt, B. and Schlemmer, S. and Tennyson, J. and Tyuterev, V. G. and Walton, ...
  J. Quant. Spectrosc. Radiat. Transfer"} 111, 2151–2159 (2010)

2009

• Chemical modeling of L183 (L134N): an estimate of the ortho/para H₂ ratio
  Pagani, L. and Vastel, C. and Hugo, E. and Kokoouline, V. and Greene, C. H. and Bacmann, A. and Bayet, E. and Ceccarelli, C. and Peng, R. and Schlemmer, S.
  Astron. Astrophys. 494, 623–636 (2009)
• Sub-millimeter wave spectroscopy of the C₃H radical: Ro-vibrational transitions from ground to the lowest bending state
  M. Caris, T. F. Giesen, C. Duan, H. S. P. Müller, S. Schlemmer, K. M. T. Yamada
  J. Mol. Spectrosc. 253, 99–105 (2009)
• Characterization of cis- and trans-HSSOH via Rotational Spectroscopy and Quantum-Chemical Calculations
  M. Koerber, O. Baum, T. F. Giesen, S. Schlemmer, J. Hahn and J. Gauss
  Inorg. Chem. 48, 2269–2272 (2009)
• H₃⁺ + H₂ isotopic system at low temperatures: Microcanonical model and experimental study
  E. Hugo and O. Asvany and S. Schlemmer
  J. Chem. Phys. 130, Art.-No. 164302 (2009)
• Numerical simulations of kinetic ion temperature in a cryogenic linear multipole trap
  Asvany, O. and Schlemmer, S.
  Int. J. Mass Spectrom. 279, 147–155 (2009)
• The torsional and asymmetry splittings in HSOH
  Yamada, K. M. T. and Jensen, P. and Ross, S. C. and Baum, O. and Giesen, T. F. and Schlemmer, S.
  J. Mol. Struct. 927, 96–100 (2009)
• Submillimeter-Wave Spectrum of anti–anti and anti–gauche Diethyl Ether
  A. Walters, H. S. P. Müller, F. Lewen, and S. Schlemmer
  J. Mol. Spectrosc. 257, 24–28 (2009)
• The Rotational Gas-Phase Spectrum of trans- and cis-HSSOH at 100 GHz
  M. Koerber, O. Baum, U. Hahn, J. Gauss, T. F. Giesen, and S. Schlemmer
  J. Mol. Spectrosc. 257, 34–39 (2009)
• Rotational Transitions within the 2¹, 3¹, 4¹, and 6¹ States of Formaldehyde H₂¹²C¹⁶O
  L. Margulès, A. Perrin, R. Janeckovà, S. Bailleux, C. P. Endres, T. F. Giesen, and S. Schlemmer
  Can. J. Phys. 87, 425–435 (2009)
• Rotational Spectroscopy of the CO-para-H₂ Molecular Complex
  Potapov, A. V. and Surin, L. A. and Panfilov, V. A. and Dumesh, B. S. and Giesen, T. F. and Schlemmer, S. and Raston, P. L. and Jäger, W.
  Astrophys. J. 703, 2108–2112 (2009)
• Dimethyl Ether: Laboratory Spectra up to 2.1 THz. Torsion-Rotational Spectra within the Vibrational Ground State
  Endres, C. P. and Drouin, B. J. and Pearson, J. C. and Müller, H. S. P. and Lewen, F. and Schlemmer, S. and Giesen, T. F.
  Astron. Astrophys. 504, 635–640 (2009)

2008

• High-Resolution Laboratory Terahertz-Spectroscopy and Applications to Astrophysics; in Frontiers of Molecular Spectroscopy, Jaan Laane (ed.)
  S. Schlemmer, T. Giesen, F. Lewen, and G. Winnewisser (2008)
• High-Resolution Rotational Spectroscopy in a Cold Ion Trap: H₂D⁺ and D₂H⁺
  Asvany, O. and Ricken, O. and Müller, H. S. P. and Wiedner, M. C. and Giesen, T. F. and Schlemmer, S.
  Phys. Rev. Lett. 100, Art.-No. 233004 (2008)
• High-Frequency Rotational Spectrum of Thioformaldehyde, H₂CS, in the Ground Vibrational State
  Maeda, A. and Medvedev, I. R. and Winnewisser, M. and De Lucia, F. C. and Herbst, E. and Müller, H. S. P. and Koerber, M. and Endres, C. P. and Schlemmer, S.
  Astrophys. J., Suppl. Ser. 176, 543–550 (2008)
• Rotational spectra and hyperfine structure of isotopic species of deuterated cyanoacetylene, DC₃N
  Spahn, H. and Müller, H. S. P. and Giesen, T. F. and Grabow, J.-U. and Harding, M. E. and Gauss, J. and Schlemmer, S.
  Chem. Phys. 346, 132–138 (2008)
• Detection of 6 K gas in Ophiuchus D
  Harju, J. and Juvela, M. and Schlemmer, S. and Haikala, L. K. and Lehtinen, K. and Mattila, K.
  Astron. Astrophys. 482, 535–539 (2008)
• High-resolution infrared measurements on HSOH: Analysis of the OH fundamental vibrational mode
  Baum, O. and Giesen, T. F. and Schlemmer, S.
  J. Mol. Spectrosc. 247, 25–29 (2008)
• Rotational Study of Carbon Monoxide Solvated with Helium Atoms
  Surin, L. A. and Potapov, A. V. and Dumesh, B. S. and Schlemmer, S. and Xu, Y. and Raston, P. L. and Jäger, W.
  Phys. Rev. Lett. 101, Art.-No. 233401 (2008)
• The rotational spectrum of H³²SOH and H³⁴SOH above 1 THz
  Baum, O. and Koerber, M. and Ricken, O. and Winnewisser, G. and Yurchenko, S. N. and Schlemmer, S. and Yamada, K. M. T. and Giesen, T. F.
  J. Chem. Phys. 129, Art.-No. 224312 (2008)

2007

• CF16 differentially pumped window for ultrahigh vacuum applications
  Asvany, O. and Hugo, E. and Schlemmer, S.
  J. Vac. Sci. Technol., A 25, 628–628 (2007)
• Application of superlattice multipliers for high-resolution terahertz spectroscopy
  Endres, C. P. and Lewen, F. and Giesen, T. F. and Schlemmer, S. and Paveliev, D. G. and Koschurinov, Y. I. and Ustinov, V. M. and Zhucov, A. E.
  Rev. Sci. Instrum. 78, Art.-No. 043106 (2007)
• Rotational spectroscopy of the isotopic species of silicon monosulfide, SiS
  Müller, H. S. P. and McCarthy, M. C. and Bizzocchi, L. and Gupta, H. and Esser, S. and Lichau, H. and Caris, M. and Lewen, F. and Hahn, J. and Degli Esposti, C. and Schlemmer, S. and Thaddeus, P.
  Phys. Chem. Chem. Phys. 9, 1579–1586 (2007)
• Overtone spectroscopy of H₂D⁺ and D₂H⁺ using laser induced reactions
  Asvany, O. and Hugo, E. and Müller, F. and Kühnemann, F. and Schiller, S. and Tennyson, J. and Schlemmer, S.
  J. Chem. Phys. 127, Art.-Nr. 154317 (2007)
• High resolution infrared spectra of the linear carbon cluster C₇: The  ν₄ stretching fundamental band and associated hot bands
  Neubauer-Guenther, P. and Giesen, T. F. and Schlemmer, S. and Yamada, K. M. T.
  J. Chem. Phys. 127, Art.-Nr. 014313 (2007)
• Photodesorption of CO Ice
  Öberg, K. I. and Fuchs, G. W. and Awad, Z. and Fraser, H. J. and Schlemmer, S. and van Dishoeck, E. F. and Linnartz, H.
  Astrophys. J. 662, L23–L26 (2007)
• Higher Energy States in the CO Dimer: Millimeter-Wave Spectra and Rovibrational Calculations
  L. A. Surin, D. N. Fourzikov, T. F. Giesen, S. Schlemmer, G. Winnewisser, V. A. Panfilov, B. S. Dumesh, G. W. M. Vissers, A. van der Avoird
  J. Phys. Chem. A 111, 12238–12247 (2007)

2006

• Desorption rates and sticking coefficients for CO and N₂ interstellar ices
  Bisschop, S. E. and Fraser, H. J. and Öberg, K. I. and van Dishoeck, E. F. and Schlemmer, S.
  Astron. Astrophys. 449, 1297–1309 (2006)
• Charging Mechanisms of Trapped Element-Selectively Excited Nanoparticles Exposed to Soft X Rays
  Grimm, M. and Langer, B. and Schlemmer, S. and Lischke, T. and Becker, U. and Widdra, W. and Gerlich, D. and Flesch, R. and Rühl, E.
  Phys. Rev. Lett. 96, Art.-Nr. 066801 (2006)
• Isotope effects in the CO dimer: Millimeter wave spectrum and rovibrational calculations of (12C18O)₂
  Surin, L. A. and Fourzikov, D. N. and Giesen, T. F. and Schlemmer, S. and Winnewisser, G. and Panfilov, V. A. and Dumesh, B. S. and Vissers, G. W. M. and van der Avoird, A.
  J. Chem. Phys. 125, Art.-Nr. 4304 (2006)
• Gas-phase detection of HSOD and empirical equilibrium structure of oxadisulfane
  Baum, O. and Esser, S. and Gierse, N. and Brünken, S. and Lewen, F. and Hahn, J. and Gauss, J. and Schlemmer, S. and Giesen, T. F.
  J. Mol. Spectrosc. 795, 256–262 (2006)
• High resolution rotation inversion spectroscopy on doubly deuterated ammonia, ND₂H, up to 2.6 THz
  Endres, C. P. and Müller, H. S. P. and Brünken, S. and Paveliev, D. G. and Giesen, T. F. and Schlemmer, S. and Lewen, F.
  J. Mol. Struct. 795, 242–255 (2006)
• Millimeter-wave study of the CO–N₂ van der Waals complex: new measurements of CO–ortho-N₂ and assignments of new states of CO–para-N₂
  Surin, L. A. and Potapov, A. V. and Müller, H. S. P. and Panfilov, V. A. and Dumesh, B. S. and Giesen, T. F. and Schlemmer, S.
  J. Mol. Struct. 795, 198–208 (2006)
• Comparative studies of O₂ and N₂ in pure, mixed and layered CO ices
  Fuchs, G. W. and Acharyya, K. and Bisschop, S. E. and Öberg, K. I. and van Broekhuizen, F. A. and Fraser, H. J. and Schlemmer, S. and van Dishoeck, E. F. and Linnartz, H.
  Faraday Discuss. 133, 331–345 (2006)
• Infrared spectroscopy of solid CO-CO₂ mixtures and layers
  van Broekhuizen, F. A. and Groot, I. M. N. and Fraser, H. J. and van Dishoeck, E. F. and Schlemmer, S.
  Astron. Astrophys. 451, 723–731 (2006)

2005

• Understanding the Infrared Spectrum of Bare CH₅⁺
  Asvany, O. and Kumar P, P. and Redlich, B. and Hegemann, I. and Schlemmer, S. and Marx, D.
  Science 309, 1219–1222 (2005)
• Experimental Determination of the  ν₅ cis-Bending Vibrational Frequency and Renner-Teller Structure in Ground State (X ²Π_u) Using Laser Induced Reactions
  Asvany, O. and Giesen, T. and Redlich, B. and Schlemmer, S.
  Phys. Rev. Lett. 94, Art.-Nr. 073001 (2005)
• Comparison of the cis-bending and C–H stretching vibration on the reaction of C₂H₂⁺ with H₂ using laser induced reactions
  Schlemmer, S. and Asvany, O. and Giesen, T.
  Phys. Chem. Chem. Phys. 7, 1592–1600 (2005)
• Laser induced reactions in a 22-pole ion trap
  Schlemmer, S. and Asvany, O.
  J. Phys.: Conf. Ser. 4, 134–141 (2005)
• Competition between CO and N₂ Desorption from Interstellar Ices
  Öberg, K. I. and van Broekhuizen, F. and Fraser, H. J. and Bisschop, S. E. and van Dishoeck, E. F. and Schlemmer, S.
  Astrophys. J. 621, L33–L36 (2005)

2004

• Deuteration of CH⁺_n (n = 3–5) in Collisions with HD Measured in a Low-Temperature Ion Trap
  Asvany, O. and Schlemmer, S. and Gerlich, D.
  Astrophys. J. 617, 685–692 (2004)