# Lower Limit on the Double-Alpha Decay of $^{224}\mathrm{Ra}$

Source: [feeds.aps.org](http://link.aps.org/doi/10.1103/y95w-7ztb) · 2026-11-12 · Physics
Page: https://themorning.science/story/lower-limit-on-the-double-alpha-decay-of-224-mathrm-ra-e12c546967d88a6c
Kind: research · Impact: low

## In brief

- Researchers searched for double-alpha decay of radium-224 using a GAGG:Ce crystal scintillator.
- The crystal was contaminated with thorium, which was part of the measurement setup.
- The study reports a lower limit on the decay, not a detection.

## Why it matters

The result sets a bound on a very rare nuclear decay mode, which constrains theoretical models of nuclear structure and guides future low-background searches.

## Timeline

- 2026-11-12: Paper listed by APS (Physical Review)

## Coverage

- [Lower Limit on the Double-Alpha Decay of $^{224}\mathrm{Ra}$](http://link.aps.org/doi/10.1103/y95w-7ztb) — feeds.aps.org, 2026-11-12

Tags: double-alpha decay, radium-224, rare decays, scintillators, nuclear physics

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Science – https://themorning.science