Bethe–Feynman formula
The Bethe–Feynman efficiency formula, a simple method for calculating the yield of a fission bomb,[1] was first derived in 1943 after development in 1942. Aspects of the formula are speculated to be secret restricted data.[2]
Related formula
- a = internal energy per gram
- b = growth rate
- c = sphere radius
A numerical coefficient would then be included to create the Bethe–Feynman formula—increasing accuracy by more than an order of magnitude.[3]
where γ is the thermodynamic exponent of a photon gas, E2 is the prompt energy density of the fuel, α is V_n (neutron velocity) / λ_mfp_tot (Total reaction mean free path), R_crit is the critical radius and 𝛿 is the excess supercritical radius (Rcore - Rcrit) / Rcrit.
See also
- Richard Feynman
- Hans Bethe
- Robert Serber
References
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- Feynman diagram
- Feynman–Kac formula
- Wheeler–Feynman absorber theory
- Bethe–Feynman formula
- Hellmann–Feynman theorem
- Feynman slash notation
- Feynman parametrization
- Path integral formulation
- Parton model
- Sticky bead argument
- One-electron universe
- Quantum cellular automaton
- Rogers Commission Report
- Feynman checkerboard
- Feynman sprinkler
- "There's Plenty of Room at the Bottom" (1959)
- The Feynman Lectures on Physics (1964)
- The Character of Physical Law (1965)
- QED: The Strange Theory of Light and Matter (1985)
- Surely You're Joking, Mr. Feynman! (1985)
- What Do You Care What Other People Think? (1988)
- Feynman's Lost Lecture: The Motion of Planets Around the Sun (1997)
- The Meaning of It All (1999)
- The Pleasure of Finding Things Out (1999)
- Perfectly Reasonable Deviations from the Beaten Track (2005)
- Joan Feynman (sister)
- Charles Hirshberg (nephew)
- Namesakes
- Cargo cult science
- Quantum Man: Richard Feynman's Life in Science
- Tuva or Bust!
- Feynman Prize in Nanotechnology
- Infinity (1996 film)
- QED (2001 play)
- The Challenger Disaster (2013 film)
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