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.

2, 8, 20, 28, 50, 83, 118, 126, 168, 194, 298

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

Links

Table of n, a(n) for n=1..11.

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: A230434 A018226 A162626 * A110856 A048041 A217513

Adjacent sequences: A137303 A137304 A137305 * A137307 A137308 A137309

Keyword

nonn,obsc,uned

Author

Roger L. Bagula, Apr 20 2008

Extensions

Definition not clear to me. - N. J. A. Sloane, Apr 25 2008

Status

approved