Astrochemistry in temperature variable ion traps
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1 Astrochemistry in temperature variable ion traps Dieter Gerlich Experimental methods Gas phase reactions Typical results: k(t) Selected examples Reaction of O +, N +, and FeO + with H 2 Spectroscopy Spectra of C 60 +, C 60 ++, and FeO + He tagging of H 3 + NPMS Nanoparticle in a trap Thermal stability of C 60 + Outlook More laboratory work! Chemical Modelling in Astrophysics Hamburg
2 Experiments for astrochemistry: gas phase Gas cells Molecular beams Discharges Flow systems Storage rings Optical properties Emission Spectroscopy Laser based methods FEL, Synchrotron Inhomogeneous rf fields Guided ion beams Temperature variable ion traps
3 History: guided and trapped ions D. Gerlich, J. Anal. At. Spectrom., 19, (2004) 581
4 Slow merged ion beams
5 carbon beam - ionizer - ring electrode trap 10 4 D3 + + C 3 D D3 + + C 3 D 3 + ions per N i filling C 3 D + ions per filling N i C 3 D + 13 C 12 C 2 D + C 3 D 2 + C 3 D t / s storage time / s [C n C3 / cm -3 3 ] / cm I. Savic, I. Cermak, D. Gerlich, Int. J. Mass Spectrom., 240 (2005) 139
6 CoMB-RET Tucson Coaxial Molecular Beam Ring Electrode ion Trap B. Yuan, Z. Scott, G. Tikhonov, D. Gerlich, M. A. Smith, J. Phys. Chem. A 115 (2011) 25
![ion clouds in a cold environment Dimensions: light years T = 2.7 K - 100 K [ions]=10-8 cm -3 10 4 cm -3 < n < 10 6 cm -3 life times >10 7 yr o-h 2 =?](/docs-images/74/69950967/images/7-0.jpg "10 K: 3.5 10-7 Dimensions: cm T wall = 2.")
7 ion clouds in a cold environment Dimensions: light years T = 2.7 K K [ions]=10-8 cm cm -3 < n < 10 6 cm -3 life times >10 7 yr o-h 2 =? 10 K: Dimensions: cm T wall = 2.3 K K 1000 ions 10 6 cm -3 < n < cm -3 storage time µs - min sensitivity cm 3 s -1 o-h 2 < 1%
8 Astrochemistry in temperature variable ion traps Dieter Gerlich Experimental methods Gas phase reactions Typical results: k(t) Selected examples Reaction of O +, N +, and FeO + with H 2 Spectroscopy Spectra of C 60 +, C 60 ++, and FeO + He tagging of H 3 + NPMS Nanoparticle in a trap Thermal stability of C 60 + Outlook More laboratory work! Chemical Modelling in Astrophysics Hamburg
9 AB 22PT Chemnitz, since 2010 Prague H - + D / D - + H CH + + H
10 O + + H 2 OH + + H 0.54 ev Results AB-22PT Prague A. Kovalenko T. D. Tran, S. Rednyk, Š. Roučka, P. Dohnal, R. Plašil, D. Gerlich, J. Glosík, in preparation
11 Rate coefficients O + + H 2 A. Kovalenko T. D. Tran, S. Rednyk, Š. Roučka, P. Dohnal, R. Plašil, D. Gerlich, J. Glosík, in preparation
12 Correlation diagram I. Zymak, M. Hejduk, D. Mulin, R. Plašil, J. Glosík, D. Gerlich, Ap.J. 768 (2013) 86
13 N + + H 2 : state specific rate coefficients The assumption that both the adiabatic approximation holds (i.e., k 0,2 = k 1,2 =0) and that the fine structure states of the N + ions thermalize quickly, is WRONG We NEED the slow reactivity of j a =2 and slow FS relaxation N + ( 3 P ja ) + H 2 (j) j, j a k A T A k 0, k 1, k 0, k 1, k 0, k 1, k r units: cm 3 s 1 and K k r j a relaxation 2 1, 1 0
14 NH + + H: temperature dependence AB-22PT instrument Prague (2017) in preparation
15 FeO + + H 2 + He
16 FeO + + H 2 Fe + + H 2 O 20 years: ICR, SIFT, GIB, TV SIFT, spin forbidden k(300 K) = cm 3 /s S. G. Ard et al. J. Phys. Chem. A 118 (2014) 6789 J.N. Harvey, D.P. Tew, Int. J. Mass Spectrom. 354 (2013) 263 D. Schröder et al. Int. J. Mass Spectrom. Ion Proc. 161 (1997) 175 D. Gerlich, J. Jašík, E. Andris, R. Navrátil, J. Roithová,
17 The ISORI instrument J. Jašík, Ján Zabka, J. Roithová, D. Gerlich, IJMS (2013) 204
18 FeO + + H 2 + He
19 FeO + + H 2 + He
20 Astrochemistry in temperature variable ion traps Dieter Gerlich Experimental methods Gas phase reactions Typical results: k(t) Selected examples Reaction of O +, N +, and FeO + with H 2 Spectroscopy Spectra of C 60 +, C 60 ++, and FeO + He tagging of H 3 + NPMS Nanoparticle in a trap Thermal stability of C 60 + Outlook More laboratory work! Chemical Modelling in Astrophysics Hamburg
21 C 60 + carrier of two DIB s and A E. K. Campbell, M.Holz, D. Gerlich & J. P. Maier, Nature 523 (2015) 322
22 DIBs in 22-pole E. K. Campbell, M.Holz, D. Gerlich & J. P. Maier Nature 523 (2015) 322
23 Cooling C 60 +, attaching He First synthesis of He-C 60 + ISORI
24 First gas phase IR spectra of He-C 60 + D. Gerlich, J. Jašík, J. Roithová, in preparation
25 Fine structure in He-C 60 +? D. Gerlich, J. Jašík, J. Roithová, in preparation
26 IR spectra of He-C D. Gerlich, J. Jašík, J. Roithová, in preparation
27 IR predissociation spectra of He n -FeO + He n -FeO +
28 Astrochemistry in temperature variable ion traps Dieter Gerlich Experimental methods Gas phase reactions Typical results: k(t) Selected examples Reaction of O +, N +, and FeO + with H 2 Spectroscopy Spectra of C 60 +, C 60 ++, and FeO + He tagging of H 3 + NPMS Nanoparticle in a trap Thermal stability of C 60 + Outlook More laboratory work! Chemical Modelling in Astrophysics Hamburg
29 LIICG and LICD of H 3 + and He-H 3 + Laser Induced Inhibition of Complex Growth Laser Induced Complex Dissociation I. Savic, D. Gerlich, O. Asvany, P. Jusko and S.Schlemmer, Mol Phys. 113 (2015) 2320
30 LIICG: two H 3 + transitions I. Savic and D.Gerlich using COLtrap (S. Schlemmer)
31 He-H 3 + potential I. Savic, D. Gerlich, M. Harding, A. van d.avoird, S. Schlemmer, in preparation 2017
32 He-H 3 + vdw - potential I. Savic, D. Gerlich, M. Harding, A. van d.avoird, S. Schlemmer, in preparation 2017
33 He-H 3 + system I. Savic, D. Gerlich, O. Asvanyc, P. Jusko, S. Schlemmer, Mol. Phys. 113 (2015) 2320 Michael Harding and Ad van der Avoird Jan 2017
34 He-H 3 + thermal population at 8.7 K I. Savic, D. Gerlich, M. Harding, A. van d.avoird, S. Schlemmer, in preparation 2017
35 Astrochemistry in temperature variable ion traps Dieter Gerlich Experimental methods Gas phase reactions Typical results: k(t) Selected examples Reaction of O +, N +, and FeO + with H 2 Spectroscopy Spectra of C 60 +, C 60 ++, and FeO + He tagging of H 3 + NPMS Nanoparticle in a trap Thermal stability of C 60 + Outlook More laboratory work! Chemical Modelling in Astrophysics Hamburg
36 BESSY 4PT: single np + synchrotron radiation Mie scattering x=2πa/λ Fluorescence measurements Electron emission: probability P(n) Energy distribution Spectral features (detected by dq/dt) Spectral shifts due to surface coverage Influence of the charge state ion emission M. Grimm, B. Langer, S. Schlemmer, T. Lischke, U. Becker, W. Widdra, D. Gerlich R. Flesch, und E. Rühl, Charging Mechanisms of Trapped Element-Selectively Excited Nanoparticles Exposed to Soft X-Rays, Phys. Rev. Lett. 96 (2006)
37 45 40 Absolute charge state fr / Hz Q / +e Q / e Time/ Minutes Residual x 1000
38 Gas ad- and desorption 500 nm diameter SiO 2 sphere Δm = 33 pg/h CO 2 laser 2 W cm -2 ΔT~100 K Δm=0.2fg Δm = amu/s Δm = -13 pg/h Molecular Ions and Nanoparticles in RF and AC Traps D. Gerlich, Hyperfine Interactions 146 (2003) 293
39 22 nm graphite NP in Ar and O 2 C.R. Howder, B.A. Long, D. Gerlich, R.N. Alley, S. L. Anderson J. Phys. Chem. A 119 (2015) 12538
40 Hot carbon nanoparticles
41 Ions at high temperatures D. Gerlich, S. Decker, Appl. Phys. B, 114 (2014), 257
42 SRET: parabolic mirror and lens system
43 Thermal decay of C 60 + D. Gerlich, S. Decker, Appl. Phys. B, 114 (2014), 257
44 Astrochemistry in temperature variable ion traps Dieter Gerlich Experimental methods Gas phase reactions Typical results: k(t) Selected examples Reaction of O +, N +, and FeO + with H 2 Spectroscopy Spectra of C 60 +, C 60 ++, and FeO + He tagging of H 3 + NPMS Nanoparticle in a trap Thermal stability of C 60 + Outlook More laboratory work! Chemical Modelling in Astrophysics Hamburg
45
46 Cryogenic linear quadrupole traps w4pt (Prague 2012) s4pt (Basel 2015) 2.6 K 3.6 K
47 Cryogenic trap for astrochemistry Cooperation with J. Roithova and J. Jassik, Prague
48 Universität Freiburg (C. Schlier) Ionenphysik TU Chemnitz Cooperations and hospitality M. Smith, Tucson J. Glosik, Prague J. Maier, E. Campbell, Basel S. Schlemmer, I. Savic, Köln J. Roitova, J. Jasik, Prague
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