SpaceCommand
Offer Upgrade
User ID: 68164291
 United States
08/18/2015 03:33 AM
Report Abusive Post
Report Copyright Violation | Physicists isolate neutrinos from Earth's mantle for first time! [ link to physicsworld.com] The first confirmed sightings of antineutrinos produced by radioactive decay in the Earth's mantle have been made by researchers at the Borexino detector in Italy. While such "geoneutrinos" have been detected before, it is the first time that physicists can say with confidence that about half of the antineutrinos they measured came from the Earth's mantle, with the rest coming from the crust. The Borexino team has also been able to make a new calculation of how much heat is produced in the Earth by radioactive decay, finding it to be greater than previously thought. The researchers say that in the future, the experiment should be able to measure the quantities of radioactive elements in the mantle as well. According to the bulk silicate Earth (BSE) model, most of the radioactive uranium, thorium and potassium in our planet's interior lies in the crust and mantle. Accounting for about 84% of our planet's total volume, the mantle is the large rocky layer sandwiched between the crust and the Earth's core. Heat flows from the interior of the Earth into space at a rate of about 47 TW, but one of the big mysteries of geophysics is how much of this heat is left over from when the Earth formed, and how much comes from the radioactive decay chains of uranium-238, thorium-232 and potassium-40. Peering deep undergroundOne way to settle the question is to measure the antineutrinos produced by these decay chains. These tiny particles travel easily through the Earth, which means that detectors located near the surface could give geophysicists a way of measuring the abundance of radioactive elements deep within the Earth – and thus the heat produced deep underground. More: [ link to physicsworld.com] "With an eye made quiet by the power of harmony and the deep power of joy, we see into the life of things." William Wordsworth
And yet the same revolutionary beliefs for which our forebears fought are still at issue around the globe—the belief that the rights of man come not from the generosity of the state, but from the hand of God.
John F. Kennedy Inaugural Address
Lincoln's economic advisor Henry C. Carey explained the universal issue in his 1851 Harmony of Interests:
"Two systems are before the world.... One looks to pauperism, ignorance, depopulation, and barbarism; the other to increasing wealth, comfort, intelligence, combination of action, and civilization. One looks towards universal war; the other towards universal peace. One is the English system; the other ... the American system, for ... elevating while equalizing the condition of man throughout the world."
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein |
SpaceCommand (OP)
User ID: 68164291
United States
08/18/2015 05:51 AM
Report Abusive Post
Report Copyright Violation | Re: Physicists isolate neutrinos from Earth's mantle for first time!  "With an eye made quiet by the power of harmony and the deep power of joy, we see into the life of things." William Wordsworth
And yet the same revolutionary beliefs for which our forebears fought are still at issue around the globe—the belief that the rights of man come not from the generosity of the state, but from the hand of God.
John F. Kennedy Inaugural Address
Lincoln's economic advisor Henry C. Carey explained the universal issue in his 1851 Harmony of Interests:
"Two systems are before the world.... One looks to pauperism, ignorance, depopulation, and barbarism; the other to increasing wealth, comfort, intelligence, combination of action, and civilization. One looks towards universal war; the other towards universal peace. One is the English system; the other ... the American system, for ... elevating while equalizing the condition of man throughout the world."
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein |
Face Palmer
User ID: 1149868
 Germany
08/18/2015 05:52 AM
Report Abusive Post
Report Copyright Violation | Re: Physicists isolate neutrinos from Earth's mantle for first time! cool "The world will soon wake up to the reality that everyone is broke and can collect nothing from the bankrupt, who are owed unlimited amounts by the insolvent, who are attempting to make late payments on a bank holiday in the wrong country, with an unacceptable currency, against defaulted collateral, of which nobody is sure who holds title."
Never attribute to malice that which is adequately explained by stupidity.
The woman who is not pursued sets up the doctrine that pursuit is offensive to her sex, and wants to make it a felony. No genuinely attractive woman has any such desire. - H.L. Mencken, In Defense Of Women |
