Peace through practical, proved civil defence for credible war deterrence
  • Please see also post linked here, and our summary of the key points in Herman Kahn's much-abused call for credible deterrence, On Thermonuclear War, linked here.

  • Hiroshima's air raid shelters were unoccupied because Japanese Army officers were having breakfast when B29s were detected far away, says Yoshie Oka, the operator of the Hiroshima air raid sirens on 6 August 1945...

  • In 1,881 burns cases in Hiroshima, only 17 (or 0.9 percent) were due to ignited clothing and 15 (or 0.7%) were due to the firestorm flames...

  • Dr Harold L. Brode’s new book, Nuclear Weapons in ...

  • 800 war migrants drowned on 22 April by EU policy:...

  • Photographed fireball shielding by cloud cover in ...

  • Nuclear weapons effects "firestorm" and "nuclear w...

  • Proved 97.5% survival in completely demolished houses ...

    "There has never been a war yet which, if the facts had been put calmly before the ordinary folk, could not have been prevented." - British Foreign Secretary Ernest Bevin, House of Commons Debate on Foreign Affairs, Hansard, 23 November 1945, column 786 (unfortunately secret Cabinet committees called "democracy" for propaganda purposes have not been quite so successful in preventing war). Protection is needed against collateral civilian damage and contamination in conventional, chemical and nuclear attack, with credible low yield clean nuclear deterrence against conventional warfare which, in reality (not science fiction) costs far more lives. Anti scientific media, who promulgate and exploit terrorism for profit, censor (1) vital, effective civil defense knowledge and (2) effective, safe, low yield air burst clean weapons like the Mk54 and W79 which deter conventional warfare and escalation, allowing arms negotiations from a position of strength. This helped end the Cold War in the 1980s. Opposing civil defense and nuclear weapons that really deter conventional war, is complacent and dangerous.

    War and coercion dangers have not stemmed from those who openly attack mainstream mistakes, but from those who camouflage themselves as freedom fighters to ban such free criticism itself, by making the key facts seem taboo, without even a proper debate, let alone financing research into unfashionable alternatives. Research and education in non-mainstream alternatives is needed before an unprejudiced debate, to establish all the basic facts for a real debate. “Wisdom itself cannot flourish, nor even truth be determined, without the give and take of debate and criticism.” – Robert Oppenheimer (quotation from the H-bomb TV debate hosted by Eleanor Roosevelt, 12 February 1950).

    “Apologies for freedom? I can’t handle this! ... Deal from strength or get crushed every time ... Freedom demands liberty everywhere. I’m thinking, you see, it’s not so easy. But we have to stand up tall and answer freedom’s call!” – Freedom Kids

  • Sunday, May 28, 2006

    Big bang and supernova analogies ...

    ‘Dr Edward Teller remarked recently that the origin of the earth was somewhat like the explosion of the atomic bomb…’

    – Dr Harold C. Urey, The Planets: Their Origin and Development, Yale University Press, New Haven, 1952, p. ix.

    ‘It seems that similarities do exist between the processes of formation of single particles from nuclear explosions and formation of the solar system from the debris of a supernova explosion. We may be able to learn much more about the origin of the earth, by further investigating the process of radioactive fallout from the nuclear weapons tests.’

    – Dr P.K. Kuroda, ‘Radioactive Fallout in Astronomical Settings: Plutonium-244 in the Early Environment of the Solar System,’ Radionuclides in the Environment (Dr Edward C. Freiling, Symposium Chairman), Advances in Chemistry Series No. 93, American Chemical Society, Washington, D.C., 1970.

    The fractionation of fallout particles (which have a core of refractory material - i.e., high melting point material - surrounded by material with a lower melting point which has condensed at a later time in the fireball history), and their spherical nature, is similar in a way to planets. Obviously there are many differences.

    One of the main ones is that a typical fallout particle, 1 millimetre in diameter or smaller, is drawn into a spherical shape by electrical attractive forces called surface tension - similar to the reason why water forms droplets. But planets are held together by gravity, not surface tension. The main difference is that surface tension acts on the outer surface area which in turn causes internal compression.

    Gravity, however, is not due to a surface compression but instead is mediated through the void between fundamental particles in atoms by exchange radiation which does not recognise macroscopic surfaces, but only interacts with the subnuclear particles associated with the elementary units of mass. The radial contraction of the earth's radius by gravity, as predicted by general relativity, is 1.5 mm. [This contraction of distance hasn't been measured directly, but the corresponding contraction or rather 'dilation' of time has been accurately measured by atomic clocks which have been carried to various altitudes (where gravity is weaker) in aircraft. Spacetime tells us that where distance is contracted, so is time.]

    This contraction is not caused by a material pressure carried through the atoms of the earth, but is instead due to the gravity-causing exchange radiation of gravity which is carried through the void (nearly 100% of atomic volume is void). Hence the contraction is independent of the chemical nature of the earth. (Similarly, the contraction of moving bodies is caused by the same exchange radiation effect, and so is independent of the material's composition.)

    Since most of the mass of atoms is associated with the fields of gluons and virtual particles surrounding quarks, these are the gravity-affected parts of atoms, not the electrons or quarks themselves.

    The mass of a nucleon is typically 938 MeV, compared to just 0.511 MeV for an electron and 5 MeV for a quark. Hence the actual charges of matter aren't associated with much of the mass of material. Almost all the mass comes from the massive mediators of the strong force fields between quarks in nucleons, and between nucleons in nuclei heavier than hydrogen. (In the well-tested and empirically validated Standard Model, charges like fermions don't have mass at all; the entire mass is provided by a vacuum 'Higgs field'. The exact nature of the such a field is not predicted, although some constraints on its range of properties are evident.)

    Getting back to the topic at the top of this post, every type of force is nuclear in a broad sense. Gravity is basically nuclear because it depends on mass, which is concentrated in the exchange radiation between quarks in the nuclei of atoms. (If gravity was like electric charge, it would depend presumably on macroscopic surface area, which is not the case: in a charged metal sphere, the net electric charge involved in long range forces resides on the surface of the sphere not throughout its volume.) Electromagnetism in the form of the Yang Mills exchange-radiation U(1) symmetry has been unified with the weak nuclear force isospin symmetry SU(2) to produce the electroweak portion of the standard model, SU(2) x U(1), which has 4 gauge bosons that cause forces: the massive charged W+ and W- particles, the uncharged but massive Z particle, and the uncharged and light velocity (no 'rest mass') force causing photon.

    The reason why only one (the photon) of the four electroweak gauge bosons operates outside nuclear distances is simply that the other gauge bosons are attenuated by the vacuum at low energy. At high energy collisions (ie, near the charge core, assuming the particles have are able to hit hard enough to break through the vacuum shield) there is attenuation and the weak nucelar force is experienced.

    The quark is like a steel cored, rubber coated ball. Throw it gently (low energy) and all the interactions are soft, because the rubber shield is able to prevent the steel core from experiencing any direct interaction. But if you hit nuclear matter together very hard, the rubber is less effective at insulating the core and metallic interactions occur. It is really almost as simple as this; this is not a completely fraudulent analogy. Vacuum polarisation and shielding cause much of the 'rubber' type insulation. There is however some additional complexity which I've recently described on another blog, here, but as stated there it is not as complex as the supersymmetry formulation of the Standard Model.

    The strong nuclear force is described in the Standard Model by colour rotation symmetry, SU(3). It has 8 massive gluon mediators, twice as many as the electroweak force. The observed effective colour charge of quarks falls off with increasing collision energy, while the observed electromagnetic force increases with collision energy. These facts suggest that energy may be conserved between all types of gauge boson; the fall of the coupling for the strong force is accompanied by an increase in the coupling for the electromagnetic force.

    Conservation of energy of gauge bosons would suggest that when the polarised vacuum is completely broken down (at short ranges/high energies) and the electromagnetic force is maximised, the strong nuclear force will have fallen to the same value (not less than that value). Hence, including conservation of energy for the sum of gauge bosons of the fields automatically does what SUSY (supersymmetry) sets out to do, but instead of inventing unobserved imaginary superpartners like SUSY, we are utilising including a well-established physical principle (conservation of mass-energy) to do the same job.

    Of the four usually distinguished elementary forces of the universe (the strong nuclear, weak nuclear, electromagnetic and gravitational), some 50% at first glance appear to be nuclear in origin (i.e., the strong and the weak forces). However, as we have shown, electromagnetism has been unified with electromagnetism - and this electroweak unification predicted the masses of the W+, W-, and Z massive weak gauge bosons discovered at CERN in 1983, so it is hard real science. Hence on this basis there are three fundamental force categories (electroweak, strong, and gravity) of which near 67% are nuclear (electroweak ad strong). When you include the fact that gravity depends essentially on the nuclear mass between quarks as discussed above, you then see that 100% of the fundamental forces of the universe are intimately nuclear in origin.

    Back to the nuclear weapons and supernova analogy. Successive neutron captures in the explosion create very heavy elements like uranium which make the Earth radioactive today. See the previous post on this blog for the evidence for the 15 natural nuclear reactors in Gabon which occurred on Earth 1.7 billion years ago emitting 100 kW for 150 million years, when the ratio of U-235 to U-238 in uranium was higher than today (U-235 has the shorter half-life), and evidence of how nature contained the vast amount of intensely radioactive fission products for two billion years in perfect safety without any fancy concrete domes or expensive burial schemes!

    More on the Oklo natural nuclear fission reactor in a comment on Louise Riofrio's blog here.

    1 Comments:

    At 10:20 pm, Blogger nige said...

    http://twistedphysics.typepad.com/cocktail_party_physics/2006/10/baby_take_a_bel.html#comment-24130254

    In addition to the shell structure magic numbers, it is supposedly impossible to get to element number 137 for theoretical reasons: the short range attractive strong force between nucleons will be exactly balanced by the long-range electromagnetic repulsion of 137 protons!

    This assumes that the strong force coupling for inter-nucleon forces is indeed exactly 137. The whole reason for radioactivity of heavy elements is linked to the increasing difficulty the strong force has in offsetting electromagnetism as you get towards 137 protons, accounting for the shorter half-lives. So here is a derivation of the 137 number in the context of strong nuclear force mediated by pions:

    Heisenberg’s uncertainty says p*d = h/(2.Pi), if p is uncertainty in momentum, d is uncertainty in distance.

    This comes from the resolving power of Heisenberg’s imaginary gamma ray microscope, and is usually written as a minimum (instead of with “=” as above), since there will be other sources of uncertainty in the measurement process. The factor of 2 would be a factor of 4 if we consider the uncertainty in one direction about the expected position (because the uncertainty applies to both directions, it becomes a factor of 2 here).

    For light wave momentum p = mc, pd = (mc)(ct) = Et where E is uncertainty in energy (E=mc^2), and t is uncertainty in time. OK, we are dealing with massive pions, not light, but this is close enough since they are relativistic:

    Et = h/(2*Pi)

    t = d/c = h/(2*Pi*E)

    E = hc/(2*Pi*d).

    Hence we have related distance to energy: this result is the formula used even in popular texts used to show that a 80 GeV energy W+/- gauge boson will have a range of 10^-17 m. So it’s OK to do this (ie, it is OK to take uncertainties of distance and energy to be real energy and range of gauge bosons which cause fundamental forces).

    Now, the work equation E = F*d (a vector equation: “work is product of force and the distance acted against the force in the direction of the force”), where again E is uncertainty in energy and d is uncertainty in distance, implies:

    E = hc/(2*Pi*d) = Fd

    F = hc/(2*Pi*d^2)

    Notice the inverse square law resulting here!

    This force is 137.036 times higher than Coulomb’s law for unit fundamental charges! This is the usual value often given for the ratio between the strong nuclear force and the electromagnetic force (I’m aware the QCD inter quark gluon-mediated force takes different and often smaller values than 137 times the electromagnetism force).

    I first read this amazing 137 factor in nuclear stability (limiting the number of elements to a theoretical maximum of below 137) in Glenn Seaborg’s article ‘Elements beyond 100′ (in the Annual Review of Nuclear Science, v18, 1968 by accident after getting the volume to read Harold Brode’s article - which was next after Seaborg’s - entitled ‘Review of Nuclear Weapons Effects’).

    I just love the fact that elements 99-100 (Einsteinium and Fermium) were discovered in the fallout of the first Teller-type H-bomb test at Eniwetok Atoll in 1952, formed by successive neutron captures in the U-238 pusher, which was within a 25-cm thick steel outer case according to some reports. Many of the neutrons must have been trapped inside the bomb. (Theodore Taylor said that the density of neutrons inside the bomb reached the density of water!)

    ‘Dr Edward Teller remarked recently that the origin of the earth was somewhat like the explosion of the atomic bomb…’ – Dr Harold C. Urey, The Planets: Their Origin and Development, Yale University Press, New Haven, 1952, p. ix.

    ‘It seems that similarities do exist between the processes of formation of single particles from nuclear explosions and formation of the solar system from the debris of a supernova explosion. We may be able to learn much more about the origin of the earth, by further investigating the process of radioactive fallout from the nuclear weapons tests.’

    – Dr P.K. Kuroda, ‘Radioactive Fallout in Astronomical Settings: Plutonium-244 in the Early Environment of the Solar System,’ Radionuclides in the Environment (Dr Edward C. Freiling, Symposium Chairman), Advances in Chemistry Series No. 93, American Chemical Society, Washington, D.C., 1970.

    Posted by: nc | October 19, 2006 at 05:04 PM

    Comment by nigel cook | October 19, 2006

     

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