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A130598
A shell geometric model of the nucleus. The location of the magic numbers. A triangle.
13
10, 1111, 10, 111111, 11, 1110, 11111110, 1111, 11, 111111, 1111111110, 111111, 11, 1111, 11111111, 111111111110, 11111111, 1111, 11, 111111, 1111111111, 11111111111110, 1111111111, 111111, 11, 1111, 11111111, 111111111111
(list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The magic numbers of the atomic nucleus: 2, 8, 20, 28, 50, 82, 126. 0 is the location of a magic number. 10 or 11 is equal to 2 protons (or neutrons). 1110 or 1111 is equal to 2+2 protons (or neutrons). 111111 is equal to 2+2+2 protons (or neutrons)... The 2D model is a triangle and a spiral. The 3D model is a double tetrahedron and a double spiral.
LINKS
Table of n, a(n) for n=1..28.
EXAMPLE
......|----------------------- h -------------------|.....
......|.....|----------------- g --------------|....|.....
......|.....|.....|----------- f ---------|....|....|.....
......|.....|.....|....|------ d -----|...|....|....|.....
......|.....|.....|....|...|-- p -|...|...|....|....|.....
......|.....|.....|....|...|.. s .|...|...|....|....|.....
......|.....|.....|....|...|......|...|...|....|....|.....
......|.....|.....|....|......10......|...|....|....|.....
......|.....|.....|......1111....10.......|....|....|.....
......|.....|.......111111....11....1110.......|....|.....
......|........11111110..1111....11....111111.......|.....
.......1111111110...111111....11....1111...11111111.|.....
111111111110...11111111..1111....11....111111...1111111111
......|.....|.....|....|...|..|...|...|...|....|....|.....
......|.....|.....|....|...|..|1/2|...|...|....|....|.....
......|.....|.....|....|...|-- 3/2 ---|...|....|....|.....
......|.....|.....|....|------ 5/2 -------|....|....|.....
......|.....|.....|----------- 7/2 ------------|....|.....
......|.....|----------------- 9/2 -----------------|.....
......|---------------------- 11/2 -----------------------
CROSSREFS
Cf. A056951, A130517, A130556, A130602.
Sequence in context: A355316 A266589 A015026 * A267595 A266621 A110731
Adjacent sequences: A130595 A130596 A130597 * A130599 A130600 A130601
KEYWORD
nonn,tabl
AUTHOR
Omar E. Pol, Aug 10 2007
STATUS
approved

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Last modified November 24 00:34 EST 2024. Contains 378052 sequences.
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