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Search: id:A137306
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| A137306 |
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A018226 and A018227: due to the stable element 118 ( last in A018227) this is submitted as a suggested new observed list with a 459 as a probable next new atomic weight stable island. |
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+0
1
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| 2, 8, 20, 28, 50, 83, 118, 126, 168, 194, 298
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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"These are crucial to the notion of an 'island of stability', which Glenn Seaborg espoused."
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REFERENCES
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Y. Oganessian, J. Phys. G: Nucl. Part. Phys, 2007, iop.org
G. T. Seaborg - Contemporary Physics, 2004, informaworld.com
Rosenfeld, L. (1948). Nuclear Forces. Interscience Publishers, New York, xvii.
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FORMULA
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Roughly a(n) = Floor[1.53*a(n-1)]
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MATHEMATICA
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(* nuclear radius visualization from Rosenfeld*) Clear[r, A, r0, p, n, m] A[p_, n_] := If[p == 0, 1, p + n] r0 = 1.3214405*10^(-13); r[p_, n_] := r0*( 1 + 0.8*(n/A[p, n])^2 - 0.3/A[p, n]^(1/3) + 0.010*p^2/A[p, n]^(4/3)) a0 = Table[Table[r[p, n], {n, p, Floor[2*p]}], {p, 0, 120}]; ListPlot[Flatten[a0]]
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CROSSREFS
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Adjacent sequences: A137303 A137304 A137305 this_sequence A137307 A137308 A137309
Sequence in context: A043002 A108180 A018226 this_sequence A110856 A048041 A071386
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KEYWORD
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nonn,obsc,uned,probation
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Apr 20 2008
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EXTENSIONS
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Definition not clear to me. - njas, Apr 25 2008
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