How about nuclear energy instead of nuclear weapons?
Look at the European green movement of the 80s and beyond, for example, that grew out of protest movements reacting to all the high profile nuclear incidents of the era, but especially Three Mile Island, Chernobyl and Fukuoka. Most incidents were thoroughly investigated and turned out to have been caused by human error or a natural vis maior, but these people didn't campaign for increased nuclear safety, they wanted nuclear energy banned outright. And in just a few years, they organized into political parties, sometimes even ending up in government. The German Green Party was polled as the strongest party after the Fukuoka Disaster and it's still just a few points behind the current government party. And while it didn't lead to a total nuclear power ban, the German government has permanently shut down eight nuclear reactors and pledged to phase nuclear energy out completely by 2022. And they weren't the only country to stop building new nuclear plants altogether since the eighties.
Except nuclear power IS still researched. Nuclear power plants ARE still being built. Thirdly, again, you cited several events not just one. I would also say a major difference is that any reduction was reasoned and deliberated over time. Not knee-jerk to one incident. Some physicists thought cranking up the Hadron Collider could create a Black Hole that could destroy the Earth yet we hit the "ON" button anyway.