Quark-gluon plasma kreirana u laboratoriji

Quark-gluon plasma kreirana u laboratoriji

offline
  • Pridružio: 10 Feb 2005
  • Poruke: 3549

Using high-speed collisions between gold atoms, scientists think they have re-created one of the most mysterious forms of matter in the universe -- quark-gluon plasma. This form of matter was present during the first microsecond of the Big Bang and may still exist at the cores of dense, distant stars.



UC Davis physics professor Daniel Cebra is one of 543 collaborators on the research. His main role was building the electronic listening devices that collect information about the collisions, a job he compared to "troubleshooting 120,000 stereo systems."

Now, using those detectors, "we look for trends in what happened during the collision to learn what the quark-gluon plasma is like," he said.

"We have been trying to melt neutrons and protons, the building blocks of atomic nuclei, into their constituent quarks and gluons," Cebra said. "We needed a lot of heat, pressure and energy, all localized in a small space."

The scientists produced the right conditions with head-on collisions between the nuclei of gold atoms. The resulting quark-gluon plasma lasted an extremely short time -- less than 10-20 seconds, Cebra said. But the collision left tracings that the scientists could measure.

"Our work is like accident reconstruction," Cebra said. "We see fragments coming out of a collision, and we construct that information back to very small points."

Quark-gluon plasma was expected to behave like a gas, but the data shows a more liquid-like substance. The plasma is less compressible than expected, which means that it may be able to support the cores of very dense stars.

"If a neutron star gets large and dense enough, it may go through a quark phase, or it may just collapse into a black hole," Cebra said. "To support a quark star, the quark-gluon plasma would need rigidity. We now expect there to be quark stars, but they will be hard to study. If they exist, they're semi-infinitely far away."

The project is led by Brookhaven National Laboratory and Lawrence Berkeley National Laboratory, with collaborators at 52 institutions worldwide. The work was done in Brookhaven's Relativistic Heavy Ion Collider (RHIC)

Izvor

[edit by stane]
Prepravio sam naslov jer sva materija je iz univerzuma tako da ta rečenica nema smisla.



Registruj se da bi učestvovao u diskusiji. Registrovanim korisnicima se NE prikazuju reklame unutar poruka.
offline
  • Pridružio: 18 Dec 2003
  • Poruke: 7953
  • Gde živiš: Graceland

Vladimir_Z ::
"We have been trying to melt neutrons and protons, the building blocks of atomic nuclei, into their constituent quarks and gluons," Cebra said. "We needed a lot of heat, pressure and energy, all localized in a small space."


Wow... Topili su neutrone i protone... i dobili kvark-gluonsku plazmu...



offline
  • Civil Works Team Leader @ IKEA Centres Russia
  • Pridružio: 22 Jun 2005
  • Poruke: 7912
  • Gde živiš: Moskva, Rusija

Ma ko zna sta sve rade tamo u onim tunelima ispod Alpa... Ne bi me zacudilo da to bude mesto odakle ce krenuti kraj sveta... Sad

- Hej, vidi, uspeli smo da napravimo kapiju...
- Da, super, ali... Ko je ovaj lik sa rogovima i trozubcem i odakle on?
Confused

Mozda nece stici ni da kazu "Oh shi..." Confused

offline
  • Pridružio: 10 Feb 2005
  • Poruke: 3549

Pa sta je cudno,kada su uspeli da stvore uslove za "veliki prasak"(jednu od tezih reakcija),ovo im dodje kao macji kasalj.Nista nije nemoguce,a za vremensku kapiju cemo jos malo sacekati,ima tu dosta problema(npr.kako ce ljudsko telo reagovati na to?.),

offline
  • Civil Works Team Leader @ IKEA Centres Russia
  • Pridružio: 22 Jun 2005
  • Poruke: 7912
  • Gde živiš: Moskva, Rusija

Ko je pominjao vremensku kapiju... ? Very Happy

offline
  • Pridružio: 17 Mar 2004
  • Poruke: 293
  • Gde živiš: UK

Citat:Ma ko zna sta sve rade tamo u onim tunelima ispod Alpa...
Heh, neko je chitao "Andjele i Demone" Wink
Chak je i 'jadni' CERN morao da menja FAQ zbog slichnih temica Very Happy

Ko je trenutno na forumu
 

Ukupno su 788 korisnika na forumu :: 40 registrovanih, 6 sakrivenih i 742 gosta   ::   [ Administrator ] [ Supermoderator ] [ Moderator ] :: Detaljnije

Najviše korisnika na forumu ikad bilo je 3028 - dana 22 Nov 2019 07:47

Korisnici koji su trenutno na forumu:
Korisnici trenutno na forumu: _Rade, A.R.Chafee.Jr., AC-DC, Atomski čoban, Bahuss, bojankrstc, Botovac, Cirkon, cole77, Crazzer, darkangel, Dimitrise93, Faki-Valjevo, igorbugi, joca83, kos milorad, kuntalo, markocvetanovic89, Mercury, MIg, Mihajlo, mihajlot2013, Milos ZA, Misirac, mladen.zovko, mnn2, moldway, nobutado, Oluj2.1, Profica, Raptor1, Recce, Sirius, Snorks, Springfield, stegonosa, vasa.93, vlvl, VP3987, yufighter