Follow Slashdot stories on Twitter

 



Forgot your password?
typodupeerror
×

Comment Re:Claim not new (Score 4, Informative) 267

Yeah. There were also come claims with Cl-36, but multiple measurements have the effect in opposite directions and different magnitudes (http://arxiv.org/abs/1208.4357, so they seem more likely to be due to instrumentation effects than real differences

This is one of those "extraordinary evidence" things, and we aren't there yet. Annual variation is always suspect because experimental conditions can change subtly with the weather.

Comment Re:Jupiter has water (Score 1) 51

That's a bit of an overstatement. Early in the solar system's evolution after the sun ignited but before the planets formed, the sun's heat and intense solar wind caused significant differentiation in which elements were located where in the solar system. Most of the light stuff was driven out, which goes a long way to explaining why the inner planets and other bodies are primarily rocky, and the outer ones primarily gassy and icy.

Comment Re:Thorium Nuclear (Score 1) 452

Thorium reactors are well and good and may be the future of nuclear energy, but they are just as susceptible to a Fukushima-style meltdown as any other modern reactor. The Fukushima reactors were successfully shut down the moment the earthquake was registered, the problem was the decay heat. About 7% of a reactor's output is from the beta-decay of the fission fragments, so even after you stop fission you have to wait for these to decay away, which means weeks of continued heat removal. Thorium does not solve this problem. That said, any modern reactor design is much better at removing decay heat in an emergency than the antiquated design used at Fukushima.

Comment Re:Identifying proton-scale differences... (Score 2) 68

High resolution mass specs measure down to 0.0001 amu

My mass spectrometer (a Penning trap) routinely measures 1E-8 amu (10^-32 grams), and the best traps are pushing 1E-12 amu. They're getting to the point where they can see the chemical binding (mass-)energy between atoms in a molecule.

The method in the article is neat, but they've chosen a peculiar definition of "scale" in order to classify this as the most sensitive one.

Slashdot Top Deals

Never test for an error condition you don't know how to handle. -- Steinbach

Working...