Erlangen 2018 – scientific programme

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MO: Fachverband Molekülphysik

MO 12: Cold Molecules and Reactions (joint session MO/A)

MO 12.3: Talk

Tuesday, March 6, 2018, 14:45–15:00, PA 2.150

Blackbody-Induced Radiative Dissociation of van der Waals Clusters at the Cryogenic Storage Ring — •Felix Nuesslein¹, Klaus Blaum¹, Sebastian George¹, Jürgen Göck¹, Florian Grussie¹, Robert von Hahn¹, Matthias Klein², Thomas Kolling², Holger Kreckel¹, Michael Lembach², Christian Meyer¹, Preeti Manjari Mishra¹, Gereon Niedner-Schatteburg², Viviane Schmidt¹, and Andreas Wolf¹ — ¹Max-Planck-Institut für Kernphysik, D-69117 Heidelberg — ²Technische Universität Kaiserslautern, D-67663 Kaiserslautern

Recently, blackbody-induced dissociation of van der Waals clusters was studied for (SF₆)_N⁻ in a room temperature electrostatic ion beam trap [1]. However, the ground state stability of the various cluster sizes and the temperature-dependent dynamics of the infrared-active molecular clusters have not yet been investigated. For these, the Heidelberg electrostatic Cryogenic Storage Ring (CSR) provides ideal conditions. It was recently used to measure the rotational relaxation of infrared-active molecules in a ∼15 K effective radiation field [2]. Low residual gas density (<140 cm⁻³) enables storage of fast ion beams in the CSR for times up to hours [3]. Currently, we assemble a laser vaporization source to produce (SF₆)_N⁻ and SF₅⁺(SF₆)_N−1 clusters. We aim at studying their heating dynamics inside the CSR at various temperatures via the two main infrared bands of SF₆ at 10.6 µm and 16 µm.

[1] I. Rahinov et al., Eur. Phys. J. D 70 (2016) 260.

[2] C. Meyer et al., Phys. Rev. Lett. 119 (2017) 023202.

[3] R. von Hahn et al., Rev. Sci. Instrum. 87 (2016) 063115.