|
| |
|
|
A137306
|
|
Related to A018226 and A018227: due to the stable element 118 (last term in A018227) this is submitted as a suggested new observed list with 459 as a probable next new atomic weight stable island.
|
|
0
| |
|
|
2, 8, 20, 28, 50, 83, 118, 126, 168, 194, 298
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| "These are crucial to the notion of an 'island of stability', which Glenn Seaborg espoused."
|
|
|
REFERENCES
| Y. Oganessian, J. Phys. G: Nucl. Part. Phys, 2007, iop.org
Rosenfeld, L. (1948). Nuclear Forces. Interscience Publishers, New York, xvii.
G. T. Seaborg - Contemporary Physics, 2004, informaworld.com
|
|
|
FORMULA
| Roughly a(n) = Floor[1.53*a(n-1)]
|
|
|
MATHEMATICA
| (* 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]]
|
|
|
CROSSREFS
| Cf. A018226, A018227.
Sequence in context: A190640 A018226 A162626 * A110856 A048041 A071386
Adjacent sequences: A137303 A137304 A137305 * A137307 A137308 A137309
|
|
|
KEYWORD
| nonn,obsc,uned
|
|
|
AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Apr 20 2008
|
|
|
EXTENSIONS
| Definition not clear to me. - N. J. A. Sloane (njas(AT)research.att.com), Apr 25 2008
|
| |
|
|
