Washington, October 11 (ANI): American researchers are using a brand new instrument to probe iron-arsenic compounds, with a view to better understanding and developing superconductors.

The collaborative team behind the project includes experts from the U.S. Department of Energy's Ames Laboratory.

The instrument they are using for their research is situated at the DOE's sprawling new 1.4 billion-dollar complex, the Spallation Neutron Source (SNS), which is operated by Oak Ridge National Laboratory in the rolling green hills of eastern Tennessee.

The SNS uses a pulsed neutron beam to provide information about the structure and dynamics of materials, which cannot be obtained from X-rays or electron microscopes.

Neutrons, though neutral in electrical charge, interact with the nucleus. Their magnetic moment can also interact with magnetic spins in a material.

When neutrons from the beam pass through a material, they scatter off the nuclei and spins. Measuring the speed and angle of the scattered neutrons can help develop detailed information about the positions and the motion of the nuclei and spins within the material.

McQueeney, who served on the Executive Committee of the Instrumentation Development Team, has revealed that their tool is the sixth of the proposed 24 instruments to be built at the SNS.

He describes the instrument called ARCS as a wide angular-range chopper spectrometer designed to measure the vibrations of atomic nuclei.

He says that ARCS, though undergoing final testing, has already provided impressive results.

"The preliminary results are amazing. I have experience with a similar instrument and ARCS blew it away," McQueeney said, adding that it produces better results from smaller samples in a much shorter time frame.

The phenomenon of superconductivity is caused by the pairing of conduction electrons due to forces within the crystal, a phenomenon whose origin is one of the great unsolved mysteries in the field of high-temperature superconductivity.

"There are two prevailing ideas behind superconductivity. One is that pairing is mediated by lattice vibrations. The other is that it's mediated by magnetic or spin fluctuations," McQueeney said.

He said that the capability of neutrons' to measure both the lattice vibrations and spin fluctuations makes them an ideal instrument for researching and understanding superconductivity.

The quest to understand and develop superconductor technology has important energy implications, as superconductors can conduct electrical current with virtually no power loss, unlike conventional electric transmission lines that lose up to 30 per cent due to resistance in the system.

The researchers say that basic research to understand the atomic interactions that make superconductors work, and to potentially control such properties, may be helpful in addressing many scientific challenges.

An article on the research project has been published in the journal Physical Review Letters (ANI)

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Alaska, Oct 11 (ANI): A legislative panel has reportedly found that Republican vice-presidential nominee Sarah Palin had "abused her power" as Alaska Governor in firing Public Safety Commissioner Walter Monegan because of a "family grudge".

The panel of state lawmakers released its report on Friday after spending more than six hours in a closed-door session reviewing the findings.

The report running into 300 pages, however, does not recommend sanctions or a criminal investigation, reported foxnews.com.

Palin's supporters have, meanwhile, rebutted the panel's finding, saying it was "politically motivated" as elections were approaching.

At the heart of the investigation was the question of whether Sarah had pressured Monegan to fire her former brother-in-law, a state trooper, after a contentious divorce. Investigator Stephen Branchflower, in the bipartisan panel's report, found Palin in "violation" of a state ethics law that prohibits public officials from using their office for personal gain.

Palin has said Monegan was fired as part of a legitimate budget dispute. "I feel vindicated. It sounds like they've validated my belief and opinions. And, that tells me I'm not totally out in left field," Monegan said.

Branchflower said Palin "violated" a statute of the Alaska Executive Branch Ethics Act.

Palin and McCain's supporters had hoped the inquiry's finding would be delayed until after the presidential election to spare her any embarrassment and to put aside an enduring distraction as she campaigns as McCain's running mate in an uphill contest against Democrat Barack Obama.

But, the panel of lawmakers voted to release the report, although not without dissension. "I think there are some problems in this report. I would encourage people to be very cautious, to look at this with a jaundiced eye," said Republican state Sen. Gary Stevens, a member of the panel. (ANI)

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