Nuclear weapons

Basic Physics

• Energy-mass equivalence - electron-volts - curve of binding energy - energy scales (chemical vs nuclear vs annihilative)
• Pressure - temperature - ideal gases - brownian motion - radiative ablation - ionization - plasmas
• The atom - the nucleus - periodic table - size scales (electron vs proton vs neutron vs alpha particle vs large nucleus vs atomic radius vs molecular size)
• Electodynamics - strong nuclear force - weak nuclear force - quantum tunneling - radiations (alpha, beta, gamma) - transmutations (there are many!)
• Liquid drop model - superdeformation - hyperdeformation

Reactor Physics

• Neutron moderators - fueling - breeders - inherently safe designs
• Intertial confinement fusion - hydromagnetic confinement fusion - cold fusion - bubble fusion

Fission Weapons

• Criticality - subcritical - supercritical - prompt criticality - critcial insertion time - insertion (gun-type) method - spontaneous fission - implosion method
• Th233 - U233 - U235 - U238 - Pu249 - Pu240 - transuranics
• Enrichment levels - enrichment methods - degradation - downblending
• Neutron sources - prompt neutrons - delayed neutrons - initiator design
• High explosives, Taylor-Releigh instabilities - assembly geometry

Fusion Weapons and Boosting

• Layer-cake model - sparkplugs - Teller-Ulam design - stage chaining
• Core boosting - enhanced radiation weapons (neutron bombs)
• Pure fusion weapons

Delivery Systems, Effects, and Defense

• Blast theory - shock front - double flash - optimum delivery altitudes
• Miniaturization - MIRV's - penetration aids - neutron fluxes

Missile Defense

• "Anti-Ballistic Missile Systems." R.L. Garwin and H.A. Bethe. Scientific American, Vol. 218, No. 3, pp. 21-31, March 1968.
• Missile Defense Agency, with garish Flash as of 2008.12.27.
• Hans Bethe and Freeman Dyson both have some great material in their books; collect it

Miscellaneous

• Project Plowshare - Project Orion - Atoms for Peace
• Testing - test detection - treaties

See Also

• The Garwin Archive at FAS is awesome
• The National Nuclear Data Center at Brookhaven National Laboratory
• The NRDC maintains a nuclear data archive
• LBNL's Isotope Project

Books

The following textbooks range from introductory to advanced material, and all require some basic physics and associated mathematical sophistication. For obvious reasons, textbooks on actual weapon design, testing, engineering and maintenance are difficult to come across. There's a wide variety of excellent books on political theory of nuclear weapons, which I'm neither qualified to rate nor interested in becoming expert with; see blogs like Arms Control Wonk and Total WonKerr for more information, or your local university's political science department.

• Kenneth Krane's Introductory Nuclear Physics (assumes an undergraduate background in quantum mechanics)
• Weston Stacey's Fusion Plasma Physics (assumes a strong background in electromagnetics)
• James J. Dunderstadt's Nuclear Reactor Physics
• Robert Serber's Los Alamos Primer
• IANUS scientists Andre Gsponer and Jean-Pierre Hurni authored the technical report "The Physical Principles Of Thermonuclear Explosives, Inertial Confinement Fusion, And The Quest For Fourth Generation Nuclear Weapons". It's available from the IANUS website.

There's pretty much an endless line of popular-audience books about nuclear weapons, especially their early design and the characters behind them (I've got about a dozen biographies of J. Robert Oppenheimer alone). These require no particular scientific or mathematic background. Of them, the best include:

• Richard Rhodes's The Making of the Atomic Bomb (winner of the 1988 Pulitzer Prize for general non-fiction)
• Richard Rhodes's Dark Sun: The Making of the Hydrogen Bomb
• Kai Bird and Martin J. Sherwin's American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer (winner of the 2006 Pulitzer Prize in biography)