Russia is reportedly developing sub-kiloton yield tactical nuclear weapons that can be shot from the upgraded guns of its future T-14 tanks. According to Defense One:
"The Russians ... maintain their tactical nuclear stockpile in ways that we have not," Hix said. Potomac Institute head Philip Karber, who helped write the Pentagon's Russia New Generation Warfare Study, offered a bit more explanation when Defense One spoke to him in January. While the United States retains just a few of its once-large arsenal of tactical nukes, Karber estimates that Russia currently has anywhere from 2,000 to 5,000 of the weapons. "Look at what the Russians have been doing in low-fission, high-fusion, sub-kiloton tactical nuclear technology," he said. "It appears that they are putting a big effort...in both miniaturizing the warheads and using sub-kiloton low-yield warheads."
Why is that significant? By shrinking the warhead, you can shoot it out of a wider variety of guns, including, potentially, 152-millimeter tank cannons. "They've announced that the follow-on tank to the Armata will have a 152-millimeter gun missile launcher. They're talking about it having a nuclear capability. And you go, 'You're talking about building a nuclear tank, a tank that fires a nuke?' Well, that's the implication," said Karber.
The U.S. developed their own tactical nuclear weapons, such as 127, 155, 200, and 280 mm nuclear artillery shells, during the Cold War. The U.S. withdrew nuclear artillery from service in 1991, and Russia followed suit in 1992.
(Score: 2) by kaszz on Thursday April 13 2017, @05:44PM
Specific gases are released when a nuclear detonation occurs. That's how North Korea have a really hard time hiding their business. I think xenon of some isotope is one of them.
Another possibility is to assume Maxwell–Boltzmann distribution of radioactive emissions where it can be assumed most radioactive emissions will only reach a short distance. While some really very few will reach very far. By detecting these a nuclear site ought to be possible to detect really far away. In the same way fluids should remain a fluid. But some of the molecules gets enough energy to jump away and become a gas instead.