Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

Leach, K. G.; Lennarz, A.; Grossheim, A.; Klawitter, R.; Brunner, T.; Chaudhuri, A.; Chowdhury, U.; Crespo López-Urrutia, J. R.; Gallant, A. T.; Kwiatkowski, A. A.; Macdonald, T. D.; Schultz, B. E.; Seeraji, S.; Andreoiu, C.; Frekers, D.; Dilling, J.

doi:10.7566/JPSCP.6.020040

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Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF

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Crespo López-Urrutia, J. R.
Division Prof. Dr. Thomas Pfeifer, MPI for Nuclear Physics, Max Planck Society;

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http://dx.doi.org/10.7566/JPSCP.6.020040
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1411.4083
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Citation

Leach, K. G., Lennarz, A., Grossheim, A., Klawitter, R., Brunner, T., Chaudhuri, A., et al. (2015). Low-Background In-Trap Decay Spectroscopy with TITAN at TRIUMF. In JPS Conference Proceedings. The Physical Society of Japan. doi:10.7566/JPSCP.6.020040.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-0A2A-4

Abstract

An in-trap decay spectroscopy setup has been developed and constructed for use with the TITAN facility at TRIUMF. The goal of this device is to observe weak electron-capture (EC) branching ratios for the odd–odd intermediate nuclei in the ββ decay process. This apparatus consists of an up-to 6 Tesla, open-access spectroscopy ion-trap, surrounded radially by up to 7 planar Si(Li) detectors which are separated from the trap by thin Be windows. This configuration provides a significant increase in sensitivity for the detection of low-energy photons by providing backing-free ion storage and eliminating charged-particle-induced backgrounds. An intense electron beam is also employed to increase the charge-states of the trapped ions, thus providing storage times on the order of minutes, allowing for decay-spectroscopy measurements. The technique of multiple ion-bunch stacking was also recently demonstrated, which further extends the measurement possibilities of this apparatus. The current status of the facility and initial results from a 116In measurement are presented.