First measurements of UV and visible photo- and radio-luminescence of thin ThF4 films show background rates low enough that a small, enriched ThF4 film remains a viable 229mTh nuclear clock target.
Tkalya, et al., Processes of the nuclear isomer 229mTh(3/2+, 3.5 +- 1.0 eV) resonant excitation by optical photons, Phys
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Measurement of photo- and radio-luminescence of thin ThF4 films
First measurements of UV and visible photo- and radio-luminescence of thin ThF4 films show background rates low enough that a small, enriched ThF4 film remains a viable 229mTh nuclear clock target.