Wednesday, August 28, 2013
Evidence for new periodic table elementboosted
The new element has not yet been confirmed by the
official body for chemistry and physics
Scientists have presented new evidence for
the existence of an unconfirmed element with
atomic number 115.
The element is highly radioactive and exists for less
than a second before decaying into lighter atoms.
First proposed by Russian scientists in 2004, the
super-heavy element has yet to be verified by the
governing body of chemistry and physics.
The new evidence by a Swedish team is published in
the journal Physical Review Letters.
"This was a very successful experiment and is one of
the most important in the field in recent years", said
Dirk Rudolph, professor at the division of atomic
physics at Lund University, who led the research.
After the discovery of element 115, independent
confirmation to measure the exact proton number
was required, Prof Rudolph told BBC News.
He said the finding "goes beyond the standard
measurement" which had been observed previously.
A new isotope of a potential new element was
produced, which transformed into other particles via
a radioactive process named alpha decay.
The researchers also gained access to data that they
say gives them a deeper insight into the structure
and properties of super-heavy atomic nuclei.
The team bombarded a thin film of the element
americium with calcium ions, which allowed them to
measure photons in connection with the new
element's alpha decay.
Certain energies of the photons (light particles)
agreed with the expected energies for X-ray
radiation, which acts as a "fingerprint" of a given
element.
The experiment was conducted at the GSI research
facility in Germany, where scientists have
previously discovered six other new elements.
The potential new element will now be reviewed by a
committee which consists of members of the
international unions of pure and applied physics and
chemistry.
They will decide whether to recommend further
experiments before the discovery of the new element
is acknowledged.
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Its a Good development
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