Peer-Reviewed Publications

Wolfgang Christen^*, Klaus Rademann, and Uzi Even
Supersonic Beams at High Particle Densities: Model Description beyond the Ideal Gas Approximation
J. Phys. Chem. A in press.
W. Christen^* and K. Rademann
Probing free jet expansions of supercritical fluids
Phys. Scr. 80(4), 048127 (2009).
Wolfgang Christen^*, Tim Krause, and Klaus Rademann
Transferring pharmaceuticals into the gas phase
Int. J. Mass Spectrom. 277(1–3), 305–308 (2008).
Jork Leiterer, Franziska Emmerling, Ulrich Panne, Wolfgang Christen, and Klaus Rademann^*
Tracing Coffee Tabletop Traces
Langmuir 24(15), 7970–7978 (2008).
Wolfgang Christen^* and Klaus Rademann
Cooling and slowing in high-pressure jet expansions
Phys. Rev. A 77(1), 012702 (2008).
Wolfgang Christen^*, Tim Krause, and Klaus Rademann
Precise thermodynamic control of high pressure jet expansions
Rev. Sci. Instrum. 78(7), 073106 (2007).
Raoul Blume^*, Wolfgang Christen, Horst Niehus, and Klaus Rademann
The Formation of Intermediate Oxygen States on Ru(10-10) at High Pressures
J. Phys. Chem. C 111(12), 4774–4779 (2007).
Wolfgang Christen^*, Klaus Rademann, and Uzi Even
Efficient cooling in supersonic jet expansions of supercritical fluids: CO and CO₂
J. Chem. Phys. 125(17), 174307 (2006).
Raoul Blume^*, Wolfgang Christen, and Horst Niehus
Reactivity of Oxide Precursor States on Ru(0001)
J. Phys. Chem. B 110(28), 13912–13919 (2006).
Wolfgang Christen^* and Klaus Rademann
Apparatus for reactive cluster-surface studies
Rev. Sci. Instrum. 77(1), 015109 (2006).
Wolfgang Christen^*, Stephanie Geggier, Svitlana Grigorenko, and Klaus Rademann
Pulsed supersonic expansion of nonvolatile solids
Rev. Sci. Instrum. 75(11), 5048–5049 (2004).
W. Christen^* and U. Even
Hyperthermal surface-collisions of water cluster cations
Eur. Phys. J. D 24(1–3), 283–286 (2003).
W. Christen^* and U. Even
Collision-induced fragmentation and neutralization of methanol cluster cations
Eur. Phys. J. D 16(1–3), 87–90 (2001).
W. Christen^* and U. Even
Chemical reactions induced by cluster impact
Eur. Phys. J. D 9(1–4), 29–34 (1999).
Wolfgang Christen^* and Uzi Even
Cluster Impact Chemistry
J. Phys. Chem. A 102(47), 9420–9426 (1998).
W. Christen, U. Even, T. Raz, and R. D. Levine^*
Collisional energy loss in cluster surface impact: Experimental, model, and simulation studies of some relevant factors
J. Chem. Phys. 108(24), 10262–10273 (1998).
W. Christen, U. Even, T. Raz, and R. D. Levine^*
The transition from recoil to shattering in cluster-surface impact: an experimental and computational study
Int. J. Mass Spectrom. Ion Proc. 174(1–3), 35–52 (1998).
Wolfgang Christen^*, Karl-Ludwig Kompa, Hartmut Schröder, and Heinrich Stülpnagel:
Ionization of SO₂-Clusters by Scattering from Surfaces
Ber. Bunsenges. Phys. Chem. 96(9), 1197–1200 (1992).
W. Seidel, G. Forster, W. Christen, F. von Feilitzsch, H. Göbel, F. Pröbst and R. L. Mößbauer
Phase transition thermometers with high temperature resolution for calorimetric particle detectors employing dielectric absorbers
Phys. Lett. B 236(4), 483–487 (1990).

Other Publications

Wolfgang Christen
Probing Supersonic Beams from Supercritical Fluids — An Experimental and Theoretical Study, in Irene Milewski, Alexander Kendl, Paul Scheier (Eds.), 17^th Symposium on Atomic, Cluster and Surface Physics 2010 (SASP2010), 26, Innsbruck University Press, 2010.
Wolfgang Christen
High-Pressure Expansion of Molecular Gases, in Verena Grill, Tilmann Märk (Eds.), 15^th Symposium on Atomic and Surface Physics and Related Topics, 110, Innsbruck University Press, 2006.
Wolfgang Christen
Collision-Induced Reactions of Molecular Clusters, humboldt spektrum, 2–3, 28–30, 2003.
W. Seidel, W. Christen, F. v. Feilitzsch, G. Forster, H. Göbel, E. Kellner, F. Pröbst, and R. L. Mößbauer
Superconducting Transition Edge Thermometers for Calorimetric Detectors, in L. Progiato, D. V. Camin, and E. Fiorini (Eds.), Low-Temperature Detectors for Neutrinos and Dark Matter, 137–144, Éditions Frontières, Gif-sur-Yvette, 1990.

Academic Publications

Wolfgang Christen
Kurzzeitdynamik elektronischer Wechselwirkung von Molekülen und Clustern mit Festkörperoberflächen, Dissertation, Ludwig-Maximilians-Universität, München, 1996.
Wolfgang Christen
Tieftemperaturdetektoren mit SQUID-Auslesung, Diplomarbeit, Technische Universität, München, 1989.

Invited Conference Talks and Hot Topic Presentations

Probing supersonic beams from supercritical fluids — an experimental and theoretical study
Symposium on Atomic, Cluster and Surface Physics (SASP), Obergurgl, Austria, January 2010.
Molecular Beams from the Gaseous, Liquid, and Supercritical Phases
XVII European Conference on Dynamics of Molecular Systems (MOLEC XVII), St. Petersburg, Russia, August 2008.
Molekularstrahlen aus unter- und überkritischen Phasen
Clustertreffen, Berlin, Germany, September 2007.
High-Pressure Expansion of Small Molecules: Chemistry under Unusual Conditions
International Conference on Clusters at Surfaces (ICCS), Wernigerode, Germany, May/June 2006.
High-Pressure Expansion of Molecular Gases
Symposium on Atomic and Surface Physics and Related Topics, Obergurgl, Austria, February 2006.
From Large Molecules to Small Systems
James-Franck Symposium on Laser Matter Interaction, Berlin, Germany, August 2005.
Vom Cluster zum Molekül — C₈H₁₀N₄O₂ in sc-CO₂
312. Wilhelm und Else Heraeus-Seminar über freie und deponierte Cluster, Brand, Österreich, October 2003.
Chemical reactions induced by cluster-surface collisions
Deutsche Forschungsgemeinschaft, Priority Call "Chemical Reactivity of Size-Selected Clusters and Matter with Reduced Dimensions", Berlin, Germany, June 2003.
Reaktive Streuung von Clusterionen an Festkörperoberflächen
Clustertreffen, Sassnitz/Rügen, Germany, September 1999.
Cluster Impact Chemistry
Institute of Physics Congress Creating the Future, University of Salford, England, April 1999.
Cluster Impact Chemistry
Informal Cluster Workshop ICW98, Humboldt-Universität zu Berlin, Germany, November 1998.
Cluster impact chemistry
9^th International Symposium on Small Particles and Inorganic Clusters (ISSPIC 9), Lausanne, Switzerland, September 1998.
Cluster impact chemistry
European Research Conference Cluster-Surface Interactions, Cargese, Corsica, May 1998.
Cluster impact chemistry
James-Franck Symposium on Laser Matter Interaction, Tegernsee, Germany, February 1998.
Cluster-surface collisions
Israeli Conference on Molecular Dynamics and James-Franck Symposium on Laser Matter Interaction, Ein Gedi, Israel, January 1997.

Invited Seminar Talks

Probing Supersonic Beams from Supercritical Fluids
Freie Universität Berlin, Institut für Chemie und Biochemie, Prof. Eckart Rühl, Berlin, Germany, June 2010.
Supersonic Beams at High Particle Densities
Technische Universität Darmstadt, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Prof. Rolf Schäfer, Darmstadt, Germany, April 2010.
Probing free jet expansions of supercritical fluids
Universität Ulm, Institut für Oberflächenchemie und Katalyse, Prof. Thorsten Bernhardt, Ulm, Germany, December 2009.
Supersonic Beams at High Particle Densities — Chemical Physics beyond the Ideal Gas Approximation
Max-Born Institut, Department of Clusters and Interfaces, Prof. I. V. Hertel, Berlin, Germany, December 2009.
Supersonic Beams from Supercritical Fluids: From Thermodynamics to Applications
Karlsruhe Institute of Technology, Center for Functional Nanostructures, Dr. Oliver Hampe, Karlsruhe, Germany, July 2009.
Probing molecular beams from gases, liquids, and supercritical fluids
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry, Dr. Michal Fárník, Prague, Czech Republic, June 2009.
Molecular Beams from the Gaseous, Liquid, and Supercritical Phase
Max-Planck-Institut für Quantenoptik, Laser Chemistry Division, Prof. K.-L. Kompa, Garching, Germany, May 2008.
Molecular Clusters: Condensation, Cooling, Chemistry
Humboldt-Universität zu Berlin, Physics Department, Prof. H. Winter, Berlin, Germany, May 2007.
Supersonic Expansion of Supercritical Fluids
Humboldt-Universität zu Berlin, Mathematics Department, Dr. J. Geiser, Berlin, Germany, August 2006.
Cluster Impact Chemistry
Universität Kaiserslautern, Physics Department, Prof. H. M. Urbassek, Kaiserslautern, Germany, May 2003.
Cluster Impact Chemistry
Universität Paderborn, Theoretical Physics Department, Prof. Th. Frauenheim, Paderborn, Germany, November 2001.
Cluster Impact Chemistry
Brandenburgische Technische Universität Cottbus, Physical Chemistry Department, Dr. C. Weickhardt, Cottbus, Germany, June 2001.
Cluster Impact Chemistry
Max-Planck-Institut für Quantenoptik, Laser Chemistry Division, Prof. K.-L. Kompa, Garching, Germany, May 2000.
Cluster Impact Chemistry
Humboldt-Universität zu Berlin, Physics Department, Prof. G. Fußmann, Berlin, Germany, March 2000.
Cluster Impact Chemistry
Humboldt-Universität zu Berlin, Physics Department, Prof. H. Winter, Berlin, Germany, January 2000.
Cluster Impact Chemistry
Max-Born Institut, Department of Clusters and Interfaces, Prof. I. V. Hertel, Berlin, Germany, April 1998.
Cluster Impact Chemistry
Humboldt-Universität zu Berlin, Physical Chemistry Department, Prof. K. Rademann, Berlin, Germany, April 1998.

Oral Presentations

Supersonic Beams at High Particle Densities — Chemical Physics beyond the Ideal Gas Approximation
Bunsentagung, Bielefeld, Germany, May 2010.
Mass-resolved velocity distributions of supersonic jets from supercritical carbon dioxide
DPG Frühjahrstagung, Hannover, Germany, March 2010.
Understanding the velocity bifurcation in supersonic jet expansions
DPG Frühjahrstagung, Hannover, Germany, March 2010.
Cluster Growth beyond Scaling Laws
DPG Frühjahrstagung, Hamburg, Germany, March 2009.
Observing Phase Transitions in Supersonic Molecular Beams
DPG Frühjahrstagung, Hamburg, Germany, March 2009.
Cooling and Slowing in High Pressure Jet Expansions
DPG Frühjahrstagung, Darmstadt, Germany, March 2008.
Überschallexpansion überkritischer Fluide: Ethen und Propan
DPG Frühjahrstagung, Darmstadt, Germany, March 2008.
Efficient Cooling in Supersonic Jet Expansions of Supercritical Fluids
DPG Frühjahrstagung, Düsseldorf, Germany, March 2007.
Supersonic Beams at High Stagnation Pressures: Thermodynamics and Translational Cooling
DPG Frühjahrstagung, Düsseldorf, Germany, March 2007.

Miscellaneous Presentations

Adnan Sarfraz, Anne Simo, Robert Fenger, Wolfgang Christen, Klaus Rademann^*, Ernst Rößler, Franziska Emmerling, and Ulrich Panne
Crystallization and Morphological Diversity of Caffeine on Surfaces: Needles and Hexagons
Tag der Chemie, Berlin, Germany, June 2010.
W. Christen^*, B. Kobin, O. Korup, T. Krause, and K. Rademann
Supersonic Beams at High Particle Densities — Chemical Physics beyond the Ideal Gas Approximation
Bunsentagung, Bielefeld, Germany, May 2010. Awarded with the PCCP poster price.
Tim Krause, Klaus Rademann, and Wolfgang Christen^*
Optimierung der Translationskühlung von Überschallstrahlen durch reduzierte ‘Skimmer’ -Einflüsse
DPG Frühjahrstagung, Hannover, Germany, March 2010.
Wolfgang Christen^*, Björn Kobin, Oliver Korup, Tim Krause, and Klaus Rademann
Condensation in High Pressure Jet Expansions: A Joint Experimental and Theoretical Investigation
Clustertreffen, Herzogenhorn, Germany, October 2009.
Wolfgang Christen^* and Klaus Rademann
Supersonic Beams from the Gaseous, Liquid, and Supercritical Phases: Applications to Condensation and Cooling
Tag der Chemie, Potsdam, Germany, June 2009.
Wolfgang Christen^* and Klaus Rademann
Probing Phase Transitions with Supersonic Molecular Beams
Bunsentagung, Köln, Germany, May 2009.
Wolfgang Christen^* and Klaus Rademann
High-Resolution Time-of-Flight Analysis of Supersonic Beams: Surprising Effects of Pressure and Temperature on Condensation and Cooling
Symposium on Size Selected Clusters S³C, Brand, Austria, March 2009.
Adnan Sarfraz, Wolfgang Christen^*, and Klaus Rademann
Organic Molecules in Supercritical Fluids: Solubility and Shift of Phase Boundaries
Symposium on Size Selected Clusters S³C, Brand, Austria, March 2009.
Adnan Sarfraz, Wolfgang Christen^*, and Klaus Rademann
Organic Molecules in Supercritical Fluids: Solubility and Shift of Phase Boundaries
DPG Frühjahrstagung, Hamburg, Germany, March 2009.
Jork Leiterer^*, Franziska Emmerling, Ulrich Panne, K. Rademann, and W. Christen
In situ Studies of Caffeine Polymorph Crystal Formation by Droplet Evaporation
27^th BESSY User Meeting, Berlin, Germany, December 2008.
Wolfgang Christen^*, Oliver Korup, Tim Krause, and Klaus Rademann
Cooling Efficiency and Cluster Formation in High Pressure Jet Expansions
Bunsentagung, Saarbrücken, Germany, May 2008.
Wolfgang Christen^*, Oliver Korup, and Klaus Rademann
Cooling Efficiency and Cluster Formation in High Pressure Jet Expansions
Tag der Chemie, Berlin, Germany, April 2008.
Jork Leiterer^*, Franziska Emmerling, Ulrich Panne, W. Christen, and K. Rademann
In situ studies of caffeine polymorph crystal formation by droplet evaporation
Tag der Chemie, Berlin, Germany, April 2008.
Tim Krause, Klaus Rademann, and Wolfgang Christen^*
Druck- und temperaturabhängige Flugzeitmessungen gepulster Argon-Überschallstrahlen: Datenauswertung und Schlußfolgerungen bezüglich Kühlung und Kondensation
DPG Frühjahrstagung, Darmstadt, Germany, March 2008.
Adnan Sarfraz, Klaus Rademann, and Wolfgang Christen^*
Pulsed Molecular Beams of Nucleobases
DPG Frühjahrstagung, Darmstadt, Germany, March 2008.
Muhammer Bulat, Klaus Rademann, and Wolfgang Christen^*
Oberflächenstreuung massenselektierter Molekülcluster: CO_n⁺ und (CO₂)_n⁺
DPG Frühjahrstagung, Darmstadt, Germany, March 2008.
Wolfgang Christen^*, Muhammer Bulat, and Klaus Rademann
Oberflächenstreuung massenselektierter CO_n⁺-Cluster
Clustertreffen, Berlin, Germany, September 2007.
Wolfgang Christen^*, Oliver Korup, and Klaus Rademann
Überschallexpansion von überkritischen Fluiden – Ethen und Propan
Clustertreffen, Berlin, Germany, September 2007.
Wolfgang Christen^*, Tim Krause, and Klaus Rademann
Druck- und temperaturabhängige Flugzeitmessungen von gepulsten Argon-Molekularstrahlen: Kühlung, Kondensation und thermodynamisches Gleichgewicht
Clustertreffen, Berlin, Germany, September 2007.
Wolfgang Christen^*, Adnan Sarfraz, and Klaus Rademann
Gepulste Molekularstrahlen mit Nukleobasen
Clustertreffen, Berlin, Germany, September 2007.
Wolfgang Christen^*, Tim Krause, Sibylle Rabeus, and Klaus Rademann
Supersonic Jets at High Stagnation Pressures: Cooling, Nucleation, Thermodynamics
Symposium on Size Selected Clusters S³C, Brand, Austria, March 2007.
R. Blume^*, W. Christen, H. Niehus, and K. Rademann
Ru(10-10): Strongly facilitated oxide precursor and oxide formation
Tag der Chemie, Berlin, Germany, June 2006.
Wolfgang Christen^* and Klaus Rademann
Apparatus for Reactive Cluster-Surface Studies
Tag der Chemie, Berlin, Germany, June 2006.
Wolfgang Christen^*, Tim Krause, and Klaus Rademann
High-Pressure Expansion of Molecular Gases
Tag der Chemie, Berlin, Germany, June 2006.
Raoul Blume^*, Wolfgang Christen, and Klaus Rademann
Strongly Facilitated Oxide Precursor and Oxide Formation on Ru(10-10) at High Pressure
International Conference on Clusters at Surfaces (ICCS), Wernigerode, Germany, May 2006.
Wolfgang Christen^* and Klaus Rademann
Apparatus for Reactive Cluster-Surface Studies
International Conference on Clusters at Surfaces (ICCS), Wernigerode, Germany, May 2006.
Raoul Blume^*, Wolfgang Christen, Horst Niehus, and Klaus Rademann
Ru(10-10): Strongly facilitated oxide precursor and oxide formation
Bunsentagung, Erlangen, Germany, May 2006.
Wolfgang Christen^*, Tim Krause, and Klaus Rademann
High-Pressure Expansion of Molecular Gases
Bunsentagung, Erlangen, Germany, May 2006.
Wolfgang Christen^*, Muhammer Bulat, Ulf Bergmann, and Klaus Rademann
Mass Gate for Reactive Cluster-Surface Studies
DPG Frühjahrstagung, Frankfurt, Germany, March 2006.
Wolfgang Christen^*, Holger Noack, and Tim Krause, James-Franck Symposium, Berlin-Köpenick, Germany, August 2005.
Wolfgang Christen^*, Tim Krause, and Klaus Rademann, Bunsentagung, Frankfurt/Main, May 2005.
Tim Krause, Holger Noack, Adnan Sarfraz, and Wolfgang Christen^*, DPG Frühjahrstagung, Berlin, March 2005.
Wolfgang Christen^*, Holger Noack, and Tim Krause, Symposium on Size Selected Clusters S³C, Brand, February 2005.
Muhammer Bulat, Ulf Bergmann, Klaus Rademann, and Wolfgang Christen^*, DPG Frühjahrstagung, München, March 2003.
Wolfgang Christen^* and Uzi Even
Hyperthermal Surface-Collisions of Water Cluster Cations
11^th International Symposium on Small Particles and Inorganic Clusters (ISSPIC 11), Strasbourg, France, October 2002.
Wolfgang Christen^* and Uzi Even, Bunsentagung, Potsdam, May 2002.
Wolfgang Christen
Cluster Science Net
Clustertreffen, Herzogenhorn, October 2001.
Wolfgang Christen^*, Maria Kulawik, and Klaus Rademann
Kompaktes, hochauflösendes Reflektron-Flugzeitmassenspektrometer
Bunsentagung, Stuttgart, May 2001.
Maria Kulawik, Klaus Rademann, and Wolfgang Christen^*
Design of a Compact, High-Resolution Reflectron Time-of-Flight Mass Spectrometer
7^th European Conference on Atomic and Molecular Physics (ECAMP VII), Berlin, April 2001.
Wolfgang Christen^* and Uzi Even
Collision-Induced Fragmentation and Neutralization of Methanol Cluster Cations
10^th International Symposium on Small Particles and Inorganic Clusters (ISSPIC 10), Atlanta, USA, October 2000.
Wolfgang Christen and Uzi Even, European Research Conference Cluster-Surface Interactions, Castelvecchio Pascoli, Italy, June 2000.
Wolfgang Christen and Uzi Even, Israeli Conference on Molecular Dynamics and James-Franck Symposium, Ein Gedi, Israel, January 1997.
Wolfgang Christen and Karl-Ludwig Kompa, James-Franck Symposium, Jerusalem, Israel, November 1994.
Wolfgang Christen, Karl-Ludwig Kompa, and Hartmut Schröder, 14^th European Conference on Surface Science (ECOSS 14), Leipzig, September 1994.
Wolfgang Christen, Karl-Ludwig Kompa, Hartmut Schröder, and Heinrich Stülpnagel
European Research Conference on Fundamental Aspects of Clusters, Elounda, Crete, Greece, May/June 1993.
Wolfgang Christen^*, Karl-Ludwig Kompa, Hartmut Schröder, and Heinrich Stülpnagel
Ionization of SO₂-Clusters by Scattering from Single Crystal Surfaces
European Conference on Gas-Surface Dynamics, Graz, Austria, August 1992.
W. Christen^*, K. L. Kompa, H. Schröder, and H. Stülpnagel
Ionization of SO₂-clusters by scattering from surfaces
Bunsen Discussion Meeting Reactions in and with Clusters, Schliersee, March/April 1992.
W. Christen, K. L. Kompa, H. Schröder, and H. Stülpnagel, DPG Frühjahrstagung, 1992.
W. Christen^*, K. L. Kompa, Ch. Müller-Rees, H. Schröder, and H. Stülpnagel
Charged particle emission in neutral molecular beam scattering experiments
International Conference on Molecule-Surface Interactions, Jülich, October 1991.
W. Christen, F. Kaspar, K. L. Kompa, Ch. Müller-Rees, and H. Schröder, DPG-Frühjahrstagung 1991.
W. Christen, F. Kaspar, K. L. Kompa, Ch. Müller, H. Schröder, Bunsentagung, Tübingen, May 1990.
Ch. Müller, W. Christen, F. Kaspar, K. L. Kompa, H. Schröder, DPG Frühjahrstagung 1990.
F. Kaspar, W. Christen, K. L. Kompa, Ch. Müller, H. Schröder, DPG Frühjahrstagung 1990.
G. Forster, W. Seidel, F. von Feilitzsch, W. Christen, H. Goebel, F. Pröbst, and R. L. Mößbauer, DPG Frühjahrstagung 1990.