At that time, 19 microseconds after detonation, a small particle accelerator in the front of the warhead fired neutrons into the uranium sphere. These neutrons were absorbed by uranium atoms and caused them to decay. In the highly compressed mass, there was nowhere for the decay particles to go; they hit other uranium atoms and caused them to decay as well. This chain reaction cycled 60 times in the next microsecond before a small amount of compressed deuterium-tritium gas was injected into a hollow in the center of the uranium core, increasing the cycling rate to 80 times in the next 0.1 microseconds. By then, the uranium core had reached a temperature of 40 million degrees fahrenheit. That didn’t matter too much, what was important was that the gamma rays given off by the nuclear reactions radiated through the exploding mass and were absorbed by the weapon casing, 0.003 microseconds later. The casing was heated and reradiated the energy as x-rays. It was those X-rays that set the next part of the chain into action.
At the rear of the core of the W83 was a cylinder of lithium-deuteride, 10 inches in diameter and 30 inches long with a radiation shield protecting it from direct radiation from the primary. It was surrounded by an inch-thick layer of depleted uranium; it also had a rod of uranium in the center. The x-rays reradiated from the warhead casing heated and compressed the outer wrapping of depleted uranium. In 0.1 microseconds this crushed the lithium-deuteride to a cylinder only 2 inches in diameter. At this point, neutrons from the primary arrived at that inner rod of uranium, coming through a hole in the radiation shield. These caused a nuclear chain reaction to occur in the rod, super-heating the lithium-deuteride from within. Neutrons from the chain reaction split the lithium atoms into helium and tritium atoms. The colliding tritium and deuterium atoms fused into helium for another microsecond. Then, the force of the fusion reaction crushed the original core of the device so thoroughly that the dying fission reaction was revived and what was left of the original fission fuel was consumed in the inferno.
At that point, 20 microseconds after initiation, the temperature was 600 million degrees Fahrenheit and yet the outside of the warhead was only just beginning to disintegrate. Gamma radiation from the nuclear reactions had already radiated up to 1,300 feet in every direction. A region of space about the size of a small angel over the main body of the Incomparable Legion Of Light now held the equivalent explosive energy of 1.2 megatons. This enormous release of gamma radiation had been absorbed by the surrounding air, heating it to a point where it released radiation itself. This formed a glowing ball of gas that was already 400 feet across and yet was continuing to expand at many times the speed of sound. Oddly, the center remained extremely hot while the temperature of the outer part fell as it pushed the surrounding air away. The heat radiated by the outer layer had produced an initial flash of light as bright as the Sun to the observers at the Third Armored Division 25 miles away, now it generated a blast wave that separated from the fireball surface. This travelled at ten times the speed of sound and pushed the air away before creating a partial vacuum behind it. The blast wave reflected off the ground and the surrounding hills, reinforcing itself in some areas, cancelling itself in others to produce a crazy-quilt pattern of blast effects on the hapless Incomparable Legion Of Light below.
A mere 0.08 seconds after initiation the fireball was no longer pushing the blast wave before it and so it began to release the large amount of thermal energy it contained. At 1.07 seconds after initiation it started to rise rapidly as its surface temperature and brightness began to decline. However, it continued to expand until at 8 seconds after initiation it finally reached its maximum size. With a surface temperature of 3,800 degrees Fahrenheit, the fireball was glowing a dull evil red as it topped the traditional mushroom cloud..
And so it was that the prophecies were fulfilled. The Sun Of Man was indeed rising over Heaven.
Chapter Seventy
Spearhead Battalion, Third Armored Division, Heaven.
For a brief second, it just didn’t make sense. Keisha Stevenson knew what the wailing sirens and ear-splitting rattle meant but the knowledge didn’t make the needed connection to her brain. Then, the connection was made and the knowledge sent her running for her tank. All around her, the initial shock had worn off the men and women of the Spearhead Battalion and they were heading for the comforting bulk of their armored vehicles. Stevenson reached hers, scrambled up the side on one continuous motion and pushed herself through the cupola on the turret. In doing so, she banged her face on the breech of her. 50 machine gun and managed to mash her breasts on the cupola ring. That hurt.
That didn’t stop her movement, she resisted the temptation to hold herself, instead reaching up to the hatch and pulling it shut. Then she span the locks that held it in place and spun them again to make sure the hatch was tight.
“This is an exercise, Ma’am, right?” Her gunner was looking at her with eyes wide open. “A dummy drill?”
She shook her head. “We don’t play games like this in operational zones. This is the real thing. Somebody is about to pop a nuke.”
“That’s us right?” The voice was trembling.
“I sure do hope so. Hokay, brace for nuclear initiation procedures.” She leaned forward and cushioned her head on her forearms. Surreptitiously, she rubbed her breasts, quietly wishing she was back with her old tank crew. They’d been a small, self-contained little community, one where the Army had got mixing compatible people up right for once. And hitting herself on the cupola ring had really hurt.
What happened next was eerie. There was no sound, no warning, no movement, but from every crack and crevice in the tank, a pure, blinding white light poured in beams that had an almost tangible quality to them. Dust mites hanging in the air were brilliantly spotlighted, swirling in patterns that defied any easy analysis. The tank was supposed to be airtight and leakproof but the light was strong enough to show how wrong that belief was, The holes were no greater than pinpoints in size yet there was enough light coming through them to illuminate the whole of the inside of the tank. It caught in people’s hair, making them seem as if they were crowned with halos of pure light. Braced in her Commander’s seat, Stevenson was counting seconds in an effort to work out how far away the initiation had been.
She’d reached one minute and thirteen seconds when the tank was hit by what felt like an underground sledgehammer. The ground wave, she thought. The egg-heads will learn all sorts of stuff from that. The irrelevance of the thought surprised her. The front of the tank was lifting with the ground shock, then her head slammed forward as it dropped. She hadn’t felt anything like this since she’d been taken to an amusement park for her birthday and had insisted on trying the roller-coaster ride. This had all the characteristics of that ride, only the tank was shaking violently as well. The three-dimensional movement made her feel violently ill, another phenomenon reminiscent of the ride she had taken so many years ago. The only difference was that this time she wasn’t filled up with cotton-candy to make sickness a reality. All around her the air was filling with dust, the red dust from Hell, the yellow sand from Iraq, the brown grit from wherever it was in the States that this tank had come from. Instinctively, with the conditioned reflex of a First-Life human who had spent a lot of time in Hell, she clapped her bandanna over her nose and mouth. Anything to avoid breathing in the pumice. Unfortunately, her gunner misunderstood the movement, decided that if his Colonel could be sick, so could he and vomited all over the main gun.
“You’ll clean that up.” Stevenson was in no mood for the smell in her tank while the violent shaking continued. Then, to her immense relief, the vicious movement subsided. Her mind was still ticking away the seconds. One minute and forty three seconds since the flash of light, roughly 23 miles from Ground Zero. General Dynamics Land Systems, just how big was the nuke to give a ground wave like that this far out? Then, the air-wave and sound of the blast hit. The 70 ton tank was lifted slightly, the howling blast-wave catching the barrel and causing the turret to turn against the gears that rotated it. Stevenson could feel the heat rising in the tank, and the air conditioning laboring to keep conditions under control. Even with that aid, she could feel herself sweating and that was when she realized what she could hear wasn’t air conditioning, it was the tanks positive pressure system trying to ensure that the air pressure in the tank was higher than that outside. Only, the air pressure sensor was trying to cope with conditions that the tank designers had considered only in their worst nightmares and the positive pressure system was working overtime to match. Stevenson felt her ears pop as the pressure climbed.