If Alvin Weinberg, the most famous of Oak Ridgers, were alive today, he would be celebrating his 100th birthday.

This Thursday evening, as many as 600 people will celebrate his centenary by watching for free “Alvin Weinberg,” a documentary film by Oak Ridge’s Keith McDaniel.

The one-hour film, which is of PBS quality, will be shown at 6:30 and 8 p.m. Thursday, April 23, at the American Museum of Science and Energy.

The first showing is “sold out,” but a few seats are left for the second free showing at 8 p.m. To reserve a seat, you must call Connor Matthews at (865) 705-5890 or Tom Row at (865) 705-5174.