Here's the open-access arXiv preprint: https://arxiv.org/abs/2404.12311 https://arxiv.org/abs/2404.12311 ("Laser excitation of the ²²⁹Th nuclear isomeric trans

Here's the open-access arXiv preprint: https://arxiv.org/abs/2404.12311 https://arxiv.org/abs/2404.12311 ("Laser excitation of the ²²⁹Th nuclear isomeric transition in a solid-state host") Here's an HN thread with 215 additional comments, from two months ago: https://news.ycombinator.com/item?id=40194636 https://news.ycombinator.com/item?id=40194636 ("Atomic nucleus excited with laser: A breakthrough after decades (tuwien.at)") (Both threads are about an optical coupling to ²²⁹Th nuclear transitions; also, the top comment of that thread links to the paper underpinning this thread).