Hannover 2016 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 1: Precision Mass Spectrometry and Fundamental Applications I

MS 1.7: Talk

Monday, February 29, 2016, 12:45–13:00, f128

On-line commissioning of the cryogenic buffer-gas stopping cell at SHIPTRAP — •Oliver Kaleja¹, Klaus Blaum², Michael Block^3,4,5, Premaditya Chhetri¹, Sergey Eliseev², Francesca Giacoppo⁵, Fritz-Peter Hessberger⁵, Mustapha Laatiaoui⁵, Felix Lautenschläger¹, Enrique Minaya Ramirez⁶, Andrew Mistry⁵, Sebastian Raeder⁵, Lutz Schweikhard⁷, and Peter Thirolf⁸ — ¹TU Darmstadt — ²MPIK Heidelberg — ³Helmholtz-Institut Mainz — ⁴Universität Mainz — ⁵GSI Darmstadt — ⁶IPN Orsay — ⁷Universität Greifswald — ⁸LMU München

In previous experiments the masses of ^252−255No (Z=102) and ^255,256Lr (Z=103) were measured directly for the first time with the Penning-trap mass spectrometer SHIPTRAP [1,2]. In order to proceed to even heavier elements with Z≥104 the overall efficiency of the setup, currently dominated by the combined stopping and extraction efficiency from the gas stopping cell, has to be increased. Therefore, a new cryogenic buffer-gas stopping cell with a larger stopping volume has been developed [3]. Its combined stopping and extraction efficiency was recently measured for the first time under on-line conditions using fusion-evaporation reaction products from SHIP. In this talk, results from the on-line commissioning of the new cell will be presented.

M. Block et al., Nature 463 (2010) 785
E. Minaya Ramirez et al., Science 337 (2012) 1207
C. Droese et al., Nucl. Instr. Meth. Sec. B 338 (2014) 126