[tt] the physics arXiv blog

[Eugen Leitl]

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From: the physics arXiv blog <howdy at arxivblog.com>
Date: Mon, 7 Apr 2008 17:25:38 -0500 (CDT)
To: eugen at leitl.org
Subject: the physics arXiv blog
Reply-To: the physics arXiv blog <howdy at arxivblog.com>


[1]the physics arXiv blog

   [2]The hunt for superheavy elements

   Posted: 07 Apr 2008 12:11 AM CDT

   [3]Superheavy elements 

   The heaviest elements are a shy, retiring bunch. No sooner are they
   created than they disappear in a puff of smoke. The heaviest,
   ununoctium, has an atomic number of 118 and an atomic weight of 294.
   The Russians made a single atom of the stuff back in 2002 only to
   discover that it hung around for all of a millisecond.

   But it has long been thought that islands of stability exist higher up
   in the periodic table, where much heavier elements might exist for
   much longer. Today Chhanda Samanta from the University of Richmond in
   Virginia, gives the low down on what to expect.

   One important factor turns out to be the number of neutrons an element
   posseses, with islands of stability thought to exist at N=162 and 184.

   Around N=162, Samanta says keep an eye out for seaborgium-268 with a
   half life of 3.2 hours. And at N=184 he points to  darmstadtium-294,
   which looks as if it'll hang around for at least 311 years and
   seaborgium-290 which has a half life of a whopping 10^8 years.

   The race is on to find these elements and the main players are the
   Russians at Flerov Laboratory of Nuclear Reactions in Dubna and the
   Americans at the Lawrence Livermore National Laboratory in California.
   (Although in the true spirit of post cold war co-operation they've
   together formed a collaboration called the Joint Institute for Nuclear
   Research.)

   What's the betting we'll see one of these superheavies within the
   year?

   Ref:  [4]arxiv.org/abs/0803.4151: Superheavy Elements in the Magic
   Islands

   [5][arXivblog?i=JRL8Se] 
   [6][arXivblog?i=2pRIBKG] [7][arXivblog?i=3l6goxG]
   [8][arXivblog?i=seZZgvg] [9][arXivblog?i=gCfgfBG]
   [10][arXivblog?i=inPahkg] [11][arXivblog?i=B4vuYnG]
   [12][arXivblog?i=ekq4Ukg] [13][arXivblog?i=hRxmH3G] 
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References

   1. http://arxivblog.com/
   2. http://feeds.feedburner.com/~r/arXivblog/~3/265436730/
   3. http://arxivblog.com/wp-content/uploads/2008/04/superheavies.jpg
   4. http://arxiv.org/abs/0803.4151
   5. http://feeds.feedburner.com/~a/arXivblog?a=JRL8Se
   6. http://feeds.feedburner.com/~f/arXivblog?a=2pRIBKG
   7. http://feeds.feedburner.com/~f/arXivblog?a=3l6goxG
   8. http://feeds.feedburner.com/~f/arXivblog?a=seZZgvg
   9. http://feeds.feedburner.com/~f/arXivblog?a=gCfgfBG
  10. http://feeds.feedburner.com/~f/arXivblog?a=inPahkg
  11. http://feeds.feedburner.com/~f/arXivblog?a=B4vuYnG
  12. http://feeds.feedburner.com/~f/arXivblog?a=ekq4Ukg
  13. http://feeds.feedburner.com/~f/arXivblog?a=hRxmH3G
  14. http://arxivblog.com/
  15. http://www.feedburner.com/fb/a/emailunsub?id=8632699&key=kesJ612ZsV
  16. http://feeds.feedburner.com/arXivblog
  17. http://feeds.feedburner.com/arXivblog

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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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