Experimental search for the low-energy nuclear transition in229Th with undulator radiation

2015/05/28 by Atsushi Yamaguchi, Michael Kolbe, Hendrik Kaser +3 · 10 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic and Molecular Physics #Advanced Frequency and Time Standards

paper · pdf · doi:10.1088/1367-2630/17/5/053053

openalex publication_date 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

To search for the lowest energy nuclear isomeric transition in 229 Th in solid samples, a novel adsorption technique which prepares 229 Th atoms on a surface of CaF 2 is developed. Adsorbed 229 Th is exposed to highly intensive undulator radiation in the wavelength range between 130 and 320 nm, which includes the indirectly measured nuclear resonance wavelength 160(10) nm. After the excitation, fluorescence from the sample is detected with a VUV sensitive photomultiplier tube. No clear signal relating to the nuclear transition is observed and possible reasons are discussed.

Citations

• Ra+ ion trapping: toward an atomic parity violation measurement and an optical clock
• Nuclear laser spectroscopy of the 3.5 eV transition in Th-229

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