Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > NSCL researcher nabs doubly magic tin isotope, a first in North America

Abstract:
With help from newly developed equipment designed and built at Michigan State University, MSU researchers have been able to make first-of-its-kind measurements of several rare nuclei, one of which has been termed a "holy grail" of experimental nuclear physics. The discoveries, made at NSCL and using an isotope purification device, will help to refine theoretical models about how elements are created in the cosmos. Until now, this was beyond the technical reach of nearly all of the world's nuclear science facilities.

NSCL researcher nabs doubly magic tin isotope, a first in North America

East Lansing, MI | Posted on December 9th, 2008

To be published December 12 in Physical Review Letters, the paper details how the researchers were able to measure the nuclei of tin, cadmium and indium.
"Tin-100, in particular, has been sort of a holy grail of experimental nuclear physics," said NSCL senior physicist Daniel Bazin of one of the isotopes, with 50 protons and 50 neutrons, described in the paper.

Within nuclear science, 50 is considered "magic" because it's one of a handful of numbers associated with extra stability. The other magic numbers are 2, 8, 20, 28, 82 and 126.
It takes a magic number of protons or neutrons to fill the nested energetic shells that form the nucleus like stacking Russian matryoshka dolls.

To understand the concept, consider that each carved doll similarly has a magic number of marbles that precisely and completely fills the hollow interior. And just as a doll full of marbles neatly packed together is probably sturdier than one that's only half or a quarter full, so too is a closed-shell nucleus more stable than its counterparts.

Tin-100 is one of the few "doubly magic" nuclei with magic numbers of both protons and neutrons. Such nuclei are generally far more stable than other particles, especially at the fleeting, shape-shifting edge of nuclear existence. Because of this stability, doubly magic nuclei serve as useful semi-permanent signposts to rare isotope researchers who troll the unexplored terrain of the nuclear landscape seeking to answer basic questions about the structure of nuclear matter and processes that create chemical elements inside stars.

The new experimental device, the radio frequency fragment separator, provides at least a hundredfold boost to NSCL's ability to filter out the few exotic isotopes from the vast sea of other particles produced by its coupled superconducting cyclotrons and downstream magnets. Funding for the equipment was provided by the National Science Foundation.

This newfound filtering ability resulted in the first production and measurement in North America of tin-100, which has been eagerly pursued by experimentalists since at least the mid-1990s. GSI in Germany and GANIL in France are the only other nuclear science facilities in the world to have successfully produced and studied the rare, proton-rich isotope of tin, an element extensively used for thousands of years in everything from ancient spears and knives to cars and modern electronics.

In their paper, a draft version of which is available online on the arxiv.org preprint server, Bazin and his collaborators also report the measurement of half-lives of the cadmium-96 (48 protons and 48 neutrons) and indium-98 (49 protons and 49 neutrons) isotopes.

The announcement of the observation of the three rare isotopes builds on recent NSCL success in creating nuclear matter that otherwise only exists in extreme environments in space, such as exploding stars. In fall 2007, the laboratory reported the discovery of three neutron-rich isotopes of magnesium and aluminum in the journal Nature, a finding that received considerable media attention in the science and mainstream press.

The laboratory is currently undertaking a major MSU-funded upgrade, the centerpiece of which is a new low-energy reaccelerator that will be used to conduct astrophysical research. When this upgrade is completed in summer 2010, NSCL will be only facility in the world capable of offering experimentalists the chance to conduct research with fast, stopped and reaccelerated beams of rare isotopes.

A world leader in rare isotope research and nuclear science education, NSCL is a user facility serving 700 researchers in 32 countries.

####

For more information, please click here

Contacts:
National Superconducting Cyclotron Laboratory
Michigan State University
1 Cyclotron, East Lansing, Michigan 48824-1321
Phone 517-355-9671

Copyright © Michigan State University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

PETA science consortium to present hazard testing strategy at nanotoxicology meeting: High tech field ripe for use of sophisticated non-animal testing strategies April 22nd, 2014

Harris & Harris Group Notes the Receipt of Proceeds From the Sale of Molecular Imprints' Semiconductor Business to Canon April 22nd, 2014

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

Physics

A new key to unlocking the mysteries of physics? Quantum turbulence April 21st, 2014

Thinnest feasible membrane produced April 17th, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Quantum manipulation: Filling the gap between quantum and classical world April 14th, 2014

Discoveries

Like a hall of mirrors, nanostructures trap photons inside ultrathin solar cells April 22nd, 2014

Nanomaterial Outsmarts Ions April 22nd, 2014

Vacuum Ultraviolet Lamp of the Future Created in Japan: First Solid-State Vacuum UV Phosphor, Described in APL-Materials, Promises Smaller, Safer, Longer Lasting, Low Power Lamps for Industrial Applications April 22nd, 2014

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Announcements

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

PETA science consortium to present hazard testing strategy at nanotoxicology meeting: High tech field ripe for use of sophisticated non-animal testing strategies April 22nd, 2014

Harris & Harris Group Notes the Receipt of Proceeds From the Sale of Molecular Imprints' Semiconductor Business to Canon April 22nd, 2014

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE