Cohen, et al - unabridged references
- Cohen points out that the neutron bomb doesn't have the collateral damage of fallout, blast and heat effects that occurred in Hiroshima, but enhanced neutron flash radiation: 'in about a thousandth of a second it will seriously irradiate enemy soldiers (in tanks, self-propelled artillery vehicles, armored personnel carriers, in field bunkers, and most other places where they may be) out to a distance of about half to three-quarters of a mile for a warhead yield of a kiloton... Roughly half will die, most rather quickly from shock to the central nervous system. ... What doesn¡¯t it do? Well, for start-offs, when the war is over the civilian areas ¡ª villages, towns, cities ¡ª will be in just about the shape they were in before it started. There will be no lingering radioactivity [residual doses from neutron induced activity in soil are insignificant compared to the flash dose of neutrons, and it decays quickly as in Hiroshima] prevent occupation of these areas; in fact, they can be reentered almost immediately.
"The initial symptoms [from radiation] are similar to those common in radiation injury [for example, intense radiation treatment for cancer, hopefully to save your life], namely nausea, vomiting, diarrhea (and other distressing effects)." After these initial effects occur, sometime later, depending on how severe the radiation exposure is, "there is a return of symptoms, including fever, diarrhea and a step-like rise in temperature..." Quoted from the official government manual
DECAY RATE. The decay rate of radioactive
materials from a single weapon can be determined with fair accuracy by using the ABCM1A1 radiac calculator, which is a componentof the M28A1 calculator set or by using newlydeveloped automated aids. To make a quick estimate of fallout decay, analysts decrease theintensity by a factor of ten as the time after theburst increases by multiples of seven. Forexample, a dose rate of 50 cGy/hour at 1 hourafter the burst decays to 5 cGy/hour in 7 hoursand to about 0.50 cGy/hour in 49 hours. Boundaries for significant areas of newly depositedfallout are based on dose rates. For short-term (24-hour) occupancy of an area, the dose rate is20 cGy/hour at 1 hour after the burst. For longerterm occupancy, the dose rate is 10 cGy/hour at1 hour after the burst. FM 3-12 and FM 3-22 contain specific details of fallout prediction, decay,and total dose calculations.
Craters caused by surface and shallow subsurface bursts will be contaminated by neutron-induced radiation and residual radioactive fission products. The activity in and around thecrater can be estimated one hour after detonation, and the decay rate established as discussed above. http://nige.files.wordpress.com/2010/05/fm101-31-1.pdf
http://www.dtic.mil/cgi-bin/GetTRDoc?Location=U2&doc=GetTRDoc.pdf&AD=ADA382631 neutron bomb
http://chemistry.about.com/od/chemistryfaqs/f/neutronbomb.htm 24 to 48 hours
Samuel Cohen - Neutron Nukes Secrets http://groups.yahoo.com/group/EdWard-MD/message/722
The Nuclear Threat That Doesn't Exist ¨C or Does It?
¡¡by Sam Cohen and Joe Douglass¡¡¡¡March 11, 2003
¡¾Pure Fusion Warheads The small tactical battlefield neutron bomb is the closest kin to a pure-fusion device.
The principle difference is that in a pure-fusion device, the plutonium fission component is entirely eliminated.
The pure-fusion device relies on the same deuterium-tritium mixture to create its burst of high-energy neutrons, but is designed to accomplish this ¡°burn¡± without the use of any fissionable material. Thus, while still packing a neutron wallop, its explosive yield ¨C the part that does the most physical damage ¨C is much smaller because it lacks the fission component.
What little explosive yield remains can be as little as one hundredth the size of the small tactical battlefield neutron bomb.¡¿
¡ñDEVELOPMENT OF NEW LOW-YIELD NUCLEAR WEAPONS
¡¡by Sam Cohen and Joe Douglass¡¡¡¡March 9, 2003
¡¾To understand the reasons behind this concern, consider the small sizes into which very respectable yields can be packaged.
Warheads whose weight lies in the 30 to 150 pound range can ¡°have yields as low as 50 tons (high explosive equivalent) to tens of kilotons, several times the size of the first nuclear weapons that were dropped on Hiroshima and Nagasaki.
The most available warheads and easiest to manage would be in the 100 ton to 1 or 2 kiloton range.
Insofar as size is concerned, an implosion nuclear warhead could be as small as a soccer ball and weigh less than 50 pounds. ¡¿
Fourth Generation Nuclear Weapons
Andre Gsponer - also a nice read
February 11, 2008
Military effectiveness and collateral effects