Dr. Holger Kreckel

Professional Information

Tenure: January 2009 - June 2012
Current Position: Research Scientist at the Max Planck Institute for Nuclear Physics
Doctorate in Physics, University of Heidelberg, 2003
Physics Diploma, University of Heidelberg, 2000

hkreckel@illinois.edu

Bio

Postdoc, Columbia Astrophysis Laboratory, New York, 2007-2009
Postdoc, Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany, 2004-2006

Private webpage: www.hkreckel.de

Current Research

Spectroscopy of Molecular Ions,
Atomic and molecular collision studies,
Dissociative Recombination,
Ion traps,
Coulomb Explosion Imaging,

Model calculations of the Interstellar Medium,
Early Universe chemistry.

Our study of early universe H₂ formation has just been published in Science magazine [Kreckel et al. 329, 69 (2010)]. A free link is provided through the Columbia Webpage, including the supporting online material.
Here are some links to websites that covered our research. A full list can be found on the web page of D.W.Savin.

1) Conditions for universe's first stars recreated: Columbia University researchers ..., Space on MSNBC.com, July 1, 2010.
2) A Star is Born ... But How?, NSF press release .
3) Researchers shed light on birth of first stars, Astronomy, July 8, 2010.
4) Die Entstehung der ersten Sterne (Rainer Kayser), astronews.com (Germany), July 2, 2010
5) How Stars Were Born, South Asian News (India), July 7, 2010.
6) Die Entstehung der ersten Sterne (Rainer Kayser) Wissenschaft Aktuell (Germany), July 2, 2010.
7) Researchers Shed Light on Birth of the First Stars, Space and Earth Science News, July 7, 2010.
8) How Stars Were Born IndiaVision (India), July 7, 2010.
9) A Star is Born...But How?, Popular Mechanics (South Africa), July 6, 2010
10) Die Entstehung der ersten Sterne, pro-physik.de (Germany), July 2, 2010

Papers

4	F. Grussie, M. H. Berg, K. N. Crabtree, S. Gärtner, B. J. McCall, S. Schlemmer, A. Wolf, and H. Kreckel "The Low-Temperature Nuclear Spin Equilibrium of H₃⁺ in Collisions With H₂" Astrophysical Journal (2012), 759, 21.
3	A. A. Mills, B. M. Siller, M. W. Porambo, M. Perera, H. Kreckel, and B. J. McCall "Ultra-Sensitive High-Precision Spectroscopy of a Fast Molecular Ion Beam" Journal of Chemical Physics (2011), 135, 224201.
2	K. N. Crabtree, N. Indriolo, H. Kreckel, B. A. Tom and B. J. McCall "On the Ortho:Para Ratio of H₃⁺ in Diffuse Molecular Clouds" Astrophysical Journal (2011), 729, 15.
1	H. Kreckel, O. Novotny, K. N. Crabtree, H. Buhr, A. Petrignani, B. A. Tom, R. D. Thomas, M. H. Berg, D. Bing, M. Grieser, C. Krantz, M. Lestinsky, M. B. Mendes, C. Nordhorn, R. Repnow, J. Stuetzel, A. Wolf and B. J. McCall "High-Resolution Storage-Ring Measurements of the Dissociative Recombination of H₃⁺ Using a Supersonic Expansion Ion Source" Physical Review A (2010), 82, 042715.

Proceedings

K. N. Crabtree, N. Indriolo, H. Kreckel and B. J. McCall
"The ortho:para ratio of H₃⁺ in laboratory and astrophysical plasmas"
Proceedings of the International Conference of Computational Methods in Sciences and Engineering, AIP Conference Proceedings, Eds. T. E. Simos and G. Maroulis, AIP, (2015), 1642, 380.

Talks

12	M. W. Porambo, H. Kreckel, A. Mills, M. Perera, B. M. Siller and B. J. McCall "High Precision, Sensitive, Near-IR Spectroscopy in a Fast Ion Beam" Midwest Astrochemistry Meeting, University of Illinois, Urbana, IL, 2011.
11	K. N. Crabtree, N. Indriolo, H. Kreckel, B. A. Tom and B. J. McCall "Nuclear Spin of H₃⁺ in Diffuse Molecular Clouds" Sixty-Sixth International Symposium on Molecular Spectroscopy, The Ohio State University, Columbus, OH, 2011.
10	M. W. Porambo, A. A. Mills, B. M. Siller, H. Kreckel, M. Perera and B. J. McCall "Progress and Recent Developments in Sensitive, Cooled, Resolved Ion Beam Spectroscopy (SCRIBES)" Sixty-Sixth International Symposium on Molecular Spectroscopy, The Ohio State University, Columbus, OH, 2011.
9	H. Kreckel, O. Novotny, K. N. Crabtree, H. Buhr, A. Petrignani, B. A. Tom, R. D. Thomas, M. H. Berg, D. Bing, M. Grieser, C. Krantz, M. Lestinsky, M. B. Mendes, C. Nordhorn, R. Repnow, J. Stützel, A. Wolf and B. J. McCall "Storage Ring Measurements of the Dissociative Recombination of H₃⁺: a Closer Look" Midwest Astrochemistry Meeting, University of Illinois, Urbana, IL, 2010.
8	K. N. Crabtree, N. Indriolo, H. Kreckel, B. A. Tom and B. J. McCall "The ortho:para Ratio of H₃⁺ in Diffuse Molecular Clouds" Midwest Astrochemistry Meeting, University of Illinois, Urbana, IL, 2010.
7	K. N. Crabtree, N. Indriolo, H. Kreckel and B. J. McCall "The ortho:para Ratio of H₃⁺ in Laboratory and Astrophysical Plasmas" Spectroscopy of Molecular Ions in the Laboratory and in Space, Kos, Greece, 2010.
6	H. Kreckel, O. Novotny, K. N. Crabtree, H. Buhr, A. Petrignani, B. A. Tom, R. D. Thomas, M. H. Berg, D. Bing, M. Grieser, C. Krantz, M. Lestinsky, M. B. Mendes, C. Nordhorn, R. Repnow, J. Stuetzel, A. Wolf and B. J. McCall "Storage Ring Measurements of the Dissociative Recombination of H₃⁺: A Closer Look" Eighth International Conference on Dissociative Recombination: Theory, Experiments and Applications, Granlibakken, Lake Tahoe, CA, 2010.
5	A. A. Mills, B. M. Siller, H. Kreckel, M. Perera and B. J. McCall "Towards High Resolution Cavity Enhanced Spectroscopy with Fast Ion Beams" Sixty-Fifth International Symposium on Molecular Spectroscopy, The Ohio State University, Columbus, OH, 2010.
4	H. Kreckel, A. A. Mills, M. Perera, B. M. Siller, K. N. Crabtree, C. A. Kauffman and B. J. McCall "High Resolution Spectroscopy of Molecular Ion Beams" 239th American Chemical Society National Meeting, San Francisco, CA, 2010.
3	H. Kreckel, A. A. Mills, M. Perera, B. M. Siller, K. N. Crabtree, C. A. Kauffman and B. J. McCall "SCRIBES: Sensitive, Cooled, Resolved Ion-BEam Spectroscopy" Second Midwest Astrochemistry Meeting, University of Illinois, 2009.
2	A. A. Mills, K. B. Ford, H. Kreckel, M. Perera, K. N. Crabtree and B. J. McCall "Indirect Terahertz Spectroscopy of Molecular Ions Using Highly Accurate and Precise Mid-IR Spectroscopy" Sixty-Fourth International Symposium on Molecular Spectroscopy, The Ohio State University, Columbus, OH, 2009.
1	M. Perera, K. N. Crabtree, K. B. Ford, H. Kreckel, A. A. Mills and B. J. McCall "Progress in the Development of an Infrared Ion Beam Spectrometer" Sixty-Fourth International Symposium on Molecular Spectroscopy, The Ohio State University, Columbus, OH, 2009.

Posters

7	K. N. Crabtree, N. Indriolo, H. Kreckel, B. A. Tom, C. A. Kauffman, E. Becka, B. A. McGuire and B. J. McCall "Nuclear Spin Dependence of Hydrogenic Plasmas in the Laboratory and the Diffuse Interstellar Medium" Midwest Astrochemistry Meeting, University of Illinois, Urbana, IL, 2011.
6	K. N. Crabtree, N. Indriolo, H. Kreckel, B. A. Tom, C. A. Kauffman, E. Beçka, B. A. McGuire and B. J. McCall "Nuclear Spin Dependence of Hydrogenic Plasmas in the Laboratory and the Diffuse Interstellar Medium" International Astronomical Union Symposium 280: The Molecular Universe, Universidad Castilla la Mancha, Toledo, Spain, 2011.
5	M. W. Porambo, H. Kreckel, A. A. Mills, M. Perera, B. M. Siller and B. J. McCall "Sensitive, Cooled, Resolved, Ion BEam Spectroscopy: SCRIBES" Midwest Astrochemistry Meeting, University of Illinois, Urbana, IL, 2010.
4	H. Kreckel, K. N. Crabtree, C. A. Kauffman, B. A. Tom, N. Indriolo, B. A. McGuire, O. Novotny, M. Berg, D. Bing, H. Buhr, A Petrignani, C. Krantz, M. Lestinky, M. Mendes, C. Nordhorn, J. Stützel, R. Thomas, A. Wolf and B. J. McCall "Nuclear Spin Effects in the Reactions of H₃⁺ with H₂ and Electrons" Spectroscopy of Molecular Ions in the Laboratory and in Space, Kos, Greece, 2010.
3	A. A. Mills, B. M. Siller, H. Kreckel, M. Perera, M. W. Porambo and B. J. McCall "New Approaches to Molecular Ion Spectroscopy" Spectroscopy of Molecular Ions in the Laboratory and in Space, Kos, Greece, 2010.
2	K. N. Crabtree, N. Indriolo, H. Kreckel, C. A. Kauffman, E. Becka, B. A. Tom and B. J. McCall "Nuclear Spin Effects in Hydrogenic Plasmas in the Laboratory and Interstellar Medium" Gordon Research Conference on Atomic and Molecular Interactions, Colby-Sawyer College, New London, NH, 2010.
1	A. A. Mills, H. Kreckel, M. Perera, K. N. Crabtree, B. M. Siller, K. B. Ford and B. J. McCall "Ultrasensitive Infrared Spectroscopy of Molecular Ions" Air Force Molecular Dynamics Contractors Meeting, San Diego, CA, 2009.

Pre-McCall Group Publications

36. A. Petrignani, S. Altevogt, M.H. Berg, D. Bing, M. Grieser, J. Hoffmann, B. Jordon-Thaden, C. Krantz, M.B. Mendes, O. Novotný, S. Novotny, D.A. Orlov, R. Repnow, T. Sorg, J. Stützel, A. Wolf, H. Buhr, H. Kreckel, V. Kokoouline, and C.H. Greene, "Resonant structure of low-energy H₃⁺ dissociative recombination", Phys. Rev. A 83, 032711 (2011).

35. "Absolute measurement of the H^- + H → H₂ + e^- associative detachment reaction using a merged beams apparatus",
H. Bruhns, H. Kreckel, K.A. Miller, X. Urbain, and D.W. Savin, Phys. Rev. A 82, 042708 (2010)

34. "Experimental results for H₂ formation from H^- and H and implications for first star formation",
H. Kreckel, H. Bruhns, M. Čížek, S.C.O. Glover, K. A. Miller, X. Urbain, and D.W. Savin, Science 329, 69 (2010),
featured in: Science (perspectives) 329, 45 (2010).
featured in: Angew. Chem. Int. Ed. (highlights) 50, 2–4 (2011), Angew. Chem. 123, 2–4 (2011) (in German).

33. "A simple double-focusing electrostatic ion beam deflector",
H. Kreckel, H. Bruhns, K. A. Miller, E. Wåhlin, A. Davis, S. Höckh, and D. W. Savin, , Rev. Sci. Instrum, 81, 063304 (2010).

32. "A novel merged beams apparatus to study anion-neutral reactions",
H. Bruhns, H. Kreckel, K. Miller, M. Lestinsky, B. Seredyuk, W. Mitthumsiri, B.L. Schmitt, M. Schnell, X. Urbain, M.L. Rappaport, C.C. Havener, and D.W. Savin, Rev. Sci. Instrum. 81, 013112 (2010).

31. "Rotational cooling of HD⁺ molecular ions by superelastic collisions with electrons",
D. Shafir, S. Novotny, H. Buhr, S. Altevogt, A. Faure, M. Grieser, A. G. Harvey, O. Heber, J. Hoffmann, H. Kreckel, L. Lammich, I. Nevo, H. B. Pedersen, H. Rubinstein, I. F. Schneider, D. Schwalm, J. Tennyson, A. Wolf, and D. Zajfman, Phys. Rev. Lett. 102, 223202 (2009).

30. "Molecular cloud chemistry and the importance of dielectronic recombination",
P. Bryans, H. Kreckel, E. Roueff, V. Wakelam, D.W. Savin, ApJ 694, 286 (2009).

29. "Chemical probing spectroscopy of H₃⁺ above the barrier to linearity",
H. Kreckel, D. Bing, S. Reinhardt, A. Petrignani, M. Berg, A. Wolf, J. Chem. Phys. 119, 164312 (2008).

28. "Low-energy charge transfer for collisions of Si³⁺ with atomic hydrogen",
H. Bruhns, H. Kreckel, D. W. Savin, D. G. Seely, and C. C. Havener, Phys. Rev. A 77, 064702 (2008).

27. "Inelastic electron collisions of the isotopically symmetric helium dimer ⁴He₂⁺ in a storage ring",
H. Buhr, H. B. Pedersen, S. Altevogt, V. M. Andrianarijaona, H. Kreckel, L. Lammich, S. Novotny, D. Strasser, J. Hoffmann, M. Lange, M. Lestinsky, M. B. Mendes, M. Motsch, O. Novotný, D. Schwalm, X. Urbain, D. Zajfman and A. Wolf, Phys. Rev. A 77, 032719 (2008).

26. "Electron collisions and rovibrational action spectroscopy of cold H₃⁺ molecules",
H. Kreckel, A. Petrignani, M. Berg, D. Bing, S. Reinhardt, S. Altevogt, H. Buhr, M. Froese, J. Hoffmann, B. Jordon-Thaden, C. Krantz, M. Lestinsky, M. Mendes, O. Novotny, S. Novotny, H. B. Pedersen, D. A. Orlov, J. Mikosch, R. Wester, R. Plašil, J. Glosík, D. Schwalm, D. Zajfman and A. Wolf, J. Phys.: Conf. Ser. 88, 012064 (2007).

25. "Three-body kinematical correlation in the dissociative recombination of CH₂⁺",
I. Nevo, S. Novotny, H. Buhr, V. Andrianarijaona, S. Altevogt, O. Heber, J. Hoffmann, H. Kreckel, L. Lammich, M. Lestinsky, H. B. Pedersen, D. Schwalm, A. Wolf, and D. Zajfman, Phys. Rev. A 76, 022713 (2007).

24. "Electron-impact dissociation and transient properties of a stored LiH₂^- beam",
L. Lammich, S. Altevogt, H. Buhr, H. Kreckel, S. Krohn, M. Lange, D. Strasser, R. Repnow, M. Grieser, R. Schinke, Z.-W. Qu, H. Zhu, D. Schwalm, D. Zajfman and A. Wolf, Eur. Phys. Journal D 41, 103-111 (2007).

23. "Action spectroscopy of H₃⁺ and D₂H⁺ using overtone excitation",
Juraj Glosík, P. Hlavenka, R. Plasil, F. Windisch, D. Gerlich, A. Wolf, H. Kreckel, Phil. Trans. Roy. Soc. London 364, 2981-2997 (2006).

22. "Effects of molecular rotation in low-energy electron collisions of H₃⁺",
A. Wolf, H. Kreckel, M. Motsch, J. Mikosch, J. Glosik, R. Plasil, S. Altevogt, V. Andrianarijaona, H. Buhr, J. Hoffmann, L. Lammich, M. Lestinsky, I. Nevo, S. Novotny, D.A. Orlov, H.B. Pedersen, F. Sprenger, A.S. Terekhov, J. Toker, R. Wester, G. Gerlich, D. Schwalm, A. Wolf, D. Zajfman, Phil. Trans. Roy. Soc. London 364, 2931-2942 (2006).

21. "Wake effects in the evolution of fast molecular ions through thin foils",
R. Garcia-Molina, I. Abril, S. Heredia-Avalos, L. Lammich, H. Buhr, H. Kreckel, S. Krohn, D. Strasser, R. Wester, A. Wolf, D. Zajfman and D. Schwalm, Nucl. Instr. Meth. B 230, 41-45 (2005).

20. "Dissociative recombination and low-energy inelastic electron collisions of the helium dimer ion",
H. B. Pedersen, H. Buhr, S. Altevogt, V. Andrianarijaona, H. Kreckel, L. Lammich, N. de Ruette, E.M. Staicu-Casagrande, D. Schwalm, D. Strasser, X. Urbain, D. Zajfman, A. Wolf, Physical Review A 72, 012712 (2005).

19. "High resolution dissociative recombination of cold H₃⁺ and first evidence for nuclear spin effects",
H. Kreckel, M. Motsch, J. Mikosch, J. Glosik, R. Plasil, S. Altevogt, V. Andrianarijaona, H. Buhr, J. Hoffmann, L. Lammich, M. Lestinsky, I. Nevo, S. Novotny, D.A. Orlov, H.B. Pedersen, F. Sprenger, A.S. Terekhov, J. Toker, R. Wester, G. Gerlich, D. Schwalm, A. Wolf, D. Zajfman, Physical Review Letters 95, 263201 (2005),
featured in: Nature (News and Views) 440, 157 (2005).

18. "Storage ring studies on dissociative recombination and internal excitation of helium dimer ions",
H.B. Pedersen, H. Buhr, S. Altevogt, V. Andrianarijaona, H. Kreckel, L. Lammich, N. de Ruette, E.M. Staicu-Casagrande, D. Schwalm, D. Strasser, X. Urbain, D. Zajfman and A. Wolf, J. Phys.: Conf. Ser. 4, 168-176 (2005).

17. "Towards state selective measurements of the H₃⁺ dissociative recombination rate coefficient",
H. Kreckel, J. Mikosch, R. Wester, J. Glosík, R. Plasil, M. Motsch, D. Gerlich, D. Schwalm, D. Zajfman and A. Wolf, J. Phys.: Conf. Ser. 4, 126-133 (2005).

16. "DR rate coefficient measurements using stored beams of H₃⁺ and its isotopomers",
L. Lammich, D. Strasser, H. Kreckel, S. Altevogt, V. Andrianarijaona, H. Buhr, M. Lange, H.B. Pedersen, D. Schwalm, A. Wolf and D. Zajfman, J. Phys.: Conf. Ser. 4, 98-103 (2005).

15. "Cooling of molecular ion beams",
A. Wolf, S. Krohn, H. Kreckel, L. Lammich, M. Lange, D. Strasser, M. Grieser, D. Schwalm, D. Zajfman, Nucl. Instr. Meth. A 532, 69-78 (2004).

14. "Breakup Dynamics and Isotope Effects in D₂H⁺ and H₂D⁺ Dissociative Recombination",
D. Strasser, L. Lammich, H. Kreckel, M. Lange, S. Krohn, D. Schwalm, A. Wolf, D. Zajfman, Physical Review A 69, 064702 (2004).

13. "Coulomb Explosion Imaging of CH₂⁺: Target polarisation effects and bond angle distribution",
L. Lammich, H. Buhr, H. Kreckel, S. Krohn, M. Lange, D. Schwalm, R. Wester, A. Wolf, D. Strasser, D. Zajfman, Z. Vager, I. Abril, S. Heredia- Avalos, R. Garcia-Molina, Physical Review A 69, 062904 (2004).

12. "Storage Ring Experiments with Cold Molecular Ions: The H₃⁺ Puzzle",
A. Wolf, L. Lammich, D. Strasser, S. Altevogt, V. Andrianarijaona, H. Buhr, O. Heber, H. Kreckel, H. Pedersen, D. Schwalm, D. Zajfman, Physica Scripta T110, 193 (2004)

11. "Rovibrational relaxation model for H₃⁺",
H. Kreckel, J. Tennyson, D. Schwalm, D. Zajfman and A. Wolf, New J. Phys. 6, 151 (2004).

10. "Action spectroscopy and temperature diagnostics of H₃⁺ by chemical probing",
J. Mikosch, H. Kreckel, R. Wester, R. Plasil, J. Glosik, D. Gerlich, D. Schwalm and A. Wolf, J. Chem. Phys. 121, 11030 (2004).

9. "Physics with molecular ions in storage rings",
D. Zajfman, S. Krohn, M. Lange, H. Kreckel, L. Lammich, D. Strasser, D. Schwalm, X. Urbain, A. Wolf, Nucl. Inst. Meth. B 205, 360-366 (2003).

8. "Breakup dynamics in the dissociative recombination of H₃⁺ and its isotopomers",
L. Lammich, H. Kreckel, S. Krohn, M. Lange, D. Schwalm, D. Strasser, A. Wolf, D. Zajfman, Rad. Phys. Chem. 68, 175 (2003).

7. "Evidence for Subthermal Rotational Populations in Stored Molecular Ions through State-Dependent Dissociative Recombination",
L. Lammich, D. Strasser, H. Kreckel, M. Lange, H.B. Pedersen, S. Altevogt, V. Andrianarijaona, H. Buhr, O. Heber, P. Witte, D. Schwalm, A. Wolf, D. Zajfman, Phys. Rev. Lett. 91, 143201 (2003).

6. "Breakup dynamics and isotope effect in H₃⁺ and D₃⁺ dissociative recombination",
D. Strasser, L. Lammich, H. Kreckel, S. Krohn, M. Lange, A. Naaman, D. Schwalm, A. Wolf, D. Zajfman, Phys. Rev. A 66, 032719 (2002).

5. "Vibrational and rotational cooling of H₃⁺",
H. Kreckel, S. Krohn, L. Lammich, M. Lange, J. Levin, M. Scheffel, D. Schwalm, J. Tennyson, Z. Vager, R. Wester, A. Wolf, D. Zajfman, Phys. Rev. A 66, 052509 (2002).

4. "Two- and Three-Body Kinematical Correlation in the Dissociative Recombination of H₃⁺",
D. Strasser, L. Lammich, S. Krohn, M. Lange, H. Kreckel, J. Levin, D. Schwalm, Z. Vager, R. Wester, A. Wolf, D. Zajfman, Phys. Rev. Lett. 86, 779-782 (2001).

3. "Rate Coefficients and Final States for the Dissociative Recombination of LiH⁺",
S. Krohn, M. Lange, M. Grieser, L. Knoll, H. Kreckel, J. Levin, R. Repnow, D. Schwalm, R. Wester, P. Witte, A. Wolf, D. Zajfman, Phys. Rev. Lett. 86, 4005-4008 (2001).

2. "Vibrational population diagnostics for dissociative recombination experiments at the TSR using Coulomb explosion imaging",
S. Krohn, Z. Amitay, A. Baer, Z. Vager, D. Zajfman, H. Kreckel, L. Knoll, M. Lange, J. Levin, D. Schwalm, R. Wester, A. Wolf in: Dissociative Recombination: Theory, Experiment and Applications IV, edited by M. Larsson, J.B.A. Mitchell and I.F. Schneider, (World Scientific, Singapore, 2000), p. 277-280.

1. "New measurements of the dissociative recombination cross section of HD⁺ and the importance of electron beam geometry",
M. Lange, J. Levin, L. Knoll, H. Kreckel, M. Scheffel, D. Schwalm, X. Urbain, R. Wester, A. Wolf, D. Zajfman in: DissociativeRecombination:Theory, Experiment and Applications IV, edited by M. Larsson, J.B.A. Mitchell and I.F. Schneider, (World Scientific, Singapore, 2000), p. 265-269.