semi-empirical mass formula

THESIS Asimov's pump turns tungsten-186 into "plutonium-186". In our universe Pu-186 can't hold together. COMPUTEDThis uses a toy Weizsäcker mass formula with standard textbook coefficients (a_V 15.75, a_S 17.8, a_C 0.711, a_A 23.7, a_P 11.18 MeV) and a dial k that multiplies all the strong-origin terms; Coulomb stays fixed. Main (won, our world): W-186 is bound at ≈ 8.03 MeV per nucleon (measured 7.99), and Pu-186 has negative proton separation energy at k = 1. Ghost: the para-universe. Raise k and Pu-186 becomes proton-bound near k ≈ 1.5, while the most stable isobar at A = 186 moves from Z = 76 toward 92. The real "stronger" para-universe is the novel's (INVENTED); the curve is the textbook formula (MODEL).

MNEMONIC "Strong up, valley tilts toward N = Z."

k k +0.25

After Isaac Asimov, The Gods Themselves (1972): original writing, credited; the only quotation is the title’s source line. Main track = the idea that won; ghost track = the challenger that lost. Entangled partner: electron-pump.

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