| Date | Grid | Clue | Author | Editor |
|---|---|---|---|---|
| Tue, Jun 27, 2017 | 4D | 24,110 years, for plutonium 239 | John Guzzetta | Shortz |
| Sun, Nov 06, 2011 | 27A | Radioactivity figure | Elizabeth C. Gorski | Shortz |
| Thu, Oct 08, 2009 | 24A | *Physics period | Scott Atkinson | Shortz |
| Mon, Apr 22, 2002 | 40D | Radioactive decay measure | Peter Gordon | Shortz |