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A: Fachverband Atomphysik

A 25: Poster IV

A 25.26: Poster

Mittwoch, 13. März 2024, 17:00–19:00, Tent A

Refinement of an analytical method for radioisotope detection based on cavity ring-down laser spectroscopy — •Erik Thiel^1,2, Naoki Matsumoto², Momo Mukai², Keisuke Saito², Yuta Suzuki², Hideki Tomita², Kota Tsuge², and Klaus Wendt¹ — ¹Institut für Physik, Johannes Gutenberg-Universität, Mainz — ²Department of Applied Energy, Nagoya University, Japan

Cavity ring-down laser spectroscopy provides a highly sensitive method for detection of elements and even individual isotopes in gas samples. Combined with a multichannel laser source, as provided e.g. by a frequency comb, environmental or technical samples can be analysed with the highest efficiency, rapidly and with high significance. Aside of presenting the technique and its capabilities for ultratrace determination of ¹⁴C the presentation focusses specifically on the data acquisition procedure and electronics for the ringdown signal which is adapted and optimized for the multiple laser frequency excitation. It is providing a proof of concept for the determination of ring-down decay rate based on time interval analysis which utilizes the discrete recording and processing of two or more timing signals.