Release that Witch

Roland picked out a lead box, opened the lid, and held the silver-white metal block in his hand. He felt that its heavy weight was not different before it was fired. It was not much different from a piece of pure iron. The last two can be regarded as basically harmless. If you don't have a deep enough understanding of it, it's hard to imagine the appearance of it, and its amazing power in its small body.

It is with this that human beings have for the first time touched the threshold of quality conversion.

Compared to all previous chemical gunpowders, this step has taken a new step.

Roland roughly counted the number of lead boxes, about 50 or so, and the weight of the container, calculated as one kilogram of storage per box, is a full 50 kilograms of uranium 235, which is nearly 100% pure.

There are more than one room in the lead cabinet like this.

If you put them all together...

Probably the institute is really "high energy"?

"How can these things be used to become the sun that you said before?" The nightingale curiously said, "Is it a special machine, or is it ignited? I always feel that they can't burn."

"I want to know?" Roland couldn't help but smile. "It's easier than you think. Just stack the metal blocks in the box and they will automatically emit light and heat. The uranium in this cabinet." It is enough to razed the winter city without a winter, so Lucia’s responsibility is great, if the hand shakes."

The scene suddenly fell into a dead silence.

Lucia covered her mouth and her eyes were horrified.

"...no," it would be difficult for Ajima to set the channel after a while. "What do you mean, if we are not careful, we may destroy the whole city?"

The nightingale was flashing, and the lead box in Roland’s hand was taken back to the cabinet, and then his hand was pulled and dragged outward.

"Hey... wait, what are you doing?"

"Also ask!" The night rushed, "Of course, take you out of the city, and then let people transport these things! Lucia, to inform Wendy, ask her to contact the Executive Office!"

"I... I am also going to find Your Royal Highness," Ajima bit her teeth. "Only she can call the Sleeping Curse."

"It’s a joke to stop."

In the room, there was a burst of chicken and dog jumping. It took a while for Luo Lan to calm everyone down.

"Are you sure you are just kidding?" The nightingale was not good.

"Cough, of course... I am only talking about principles," he added quickly. "But actually it is not so easy to achieve motivation. Even if I do my best, it will not guarantee success."

Lucia sighed. "Your Majesty... you scared my feet."

"This is not so funny," the night glanced at him. "If Wendy and the book hear this, whether it is a joke or not."

"I am afraid that you will be asked to move the new research institute away from the place where there is no winter city?" Roland said helplessly.

"You know it, or move you to a safe place."

"Well, when I didn't say the words before..." He cleared his throat. "As long as you don't say it, Wendy and the book will not know."

"Maybe a bird has already heard it." The nightingale went out the window.

"Turn off the news, a bottle of chaotic drink." Roland did not hesitate.

"The deal." She blinked and disappeared in front of the three.

Looking at Lucia and Akima, who looked stunned, Roland shrugged. "Oh... don't care, it's part of the joke."

After a while, the nightingale returned to the house, "no suspicious targets were found, but remuneration"

"still valid."

Her expression finally eased, licking the little tune and chewing the dried fish.

"That... sire," Ajima hesitated, only to be dignified. "What you said before, isn’t it all a joke? Because when you make the rules, you repeatedly emphasize the weight, and to confuse Or, if you make a mistake, you can even control each lead box to exactly four kilograms. When weighing, you need to work with the container. This will ensure that the metal blocks in the box are equal." She paused. "And If you say that if there is an accident in the institute or if there are signs of others breaking in, the first thing to do is to inform the guards to block the scene and then return to the castle report immediately, instead of going to the hospital to check the situation. This proves... they do have Certain danger, right?"

Roland looked at her unexpectedly. "Good observation. You are basically correct. In addition to toxicity, weight is also one of the key elements. The purpose of separate placement is so." The nature of the extract can be judged from the rules and regulations. It is also cautious and meticulous. It is this carefulness that makes her wake up to the ability to trace the origin... "But the weight alone can only jeopardize the Institute and want to make it a weapon against the devil. I need another thing."

“These particles are placed separately?” Ajima quickly reacted.

"Not exactly, but at least it’s half right."

The composition of natural uranium deposits is very complicated. In addition to uranium compounds, there are usually many radioactive materials associated with them. Most of them are secondary products after decay, and some have completely lost radioactivity and become stables, while others are still in a long period of time. On the way to decay. Although the radiologists have initially refined the ore during the construction of the cursed temple, the basic components are still roughly the same, as can be seen from the refined results of Lucia.

The most abundant one is uranium 238. Although it can not be used as a weapon, it can be recognized by the ritual cube, and its performance is almost indistinguishable from that of uranium 235. Therefore, it was sent to the backyard of Beipo Mountain.

Next is uranium 235. When the purity reaches 90% or more, it can be regarded as a weapon level. The natural content is extremely low, accounting for only 1% of the natural uranium element. Therefore, the first difficulty encountered in the “璀璨 放射 radiation” route is the first difficulty. It is refining, and this is also a hurdle that most people cannot cross.

But it is not the rarest subsequent decay products such as 钍, radium, radon, and 钋. In theory, a race is rare, and what Roland needs is the natural 钋210, which is also the most common in the 钋 family. An isotope.

As a flower of the motherland cultivated by nine-year compulsory education, Roland is familiar with the two elements of radium and radon. The Curie, which is repeatedly mentioned in the textbook, is named after the discovery of them. Although the half-life of 钋210 is only a hundred days, and its content is so low that the multiple extractions of Madame Curie have failed, she still has a strong radioactivity from the ore lysate. , pointed out its existence.

Whether it is radium or sputum, it can be used to make neutron sources. This is also related to the second difficulty of 璀璨 radiation: detonation.

The principle of the first generation of nuclear weapons is very simple, even simple enough to sum up in one sentence: the nuclear fission releases energy. Specific to uranium, uranium 235 is excited to become unstable uranium 236 after receiving a neutron, and then split into two lighter nuclei and more free neutrons, the quality difference between them, It is transformed into energy.

Obviously, the released neutrons will hit other nuclides, and the cycle will be a chain reaction, and the huge energy burst will be no different from the explosion.

But in the microscopic world, the gap between the nucleus is like the heavens. As the textbook says, if the atom is regarded as a football field, then the nucleus is just an ant above. If you are not lucky, the neutron will soon fly out of bounds and the reaction will stop. To ensure that every ant is hit, it is clear that there must be enough pitches on the periphery to ensure that the neutrons traverse its path no matter which direction the neutrons fly.

Reflected in the macro world, the quality and shape are obvious.

In fact, the critical mass is not a fixed value, just like a course lined up in a straight line. The specific results require a lot of calculations based on their shape. Roland also heard an anecdote that caused the war to fail because of someone's miscalculated data. Of course, as a latecomer standing on the shoulders of giants, he naturally does not have to start from scratch. Numerous tests have proved that when the object is spherical, the critical mass is the smallest, while uranium 235 is fifty-two kilograms.

It is considered cautious that he limits the stock of uranium in each lead box to one kilogram.

But the so-called critical mass is not fixed. If the area of ​​the stadium can be greatly reduced, or if there are enough extra neutrons for the nuclides, the threshold will be greatly reduced. The former is the principle of the implosion bomb. The explosive charge is arranged on the periphery of the projectile. When the explosion occurs, the reactant is squeezed into one place, so that its density increases sharply and exceeds the critical point. For the existing technology without Winter City, whether it is calculating the critical mass of irregular monomers or precisely controlling the explosive detonation of the explosives, there are too many difficulties, so Roland puts his eyes on the latter.

Use a neutron source to ensure that the fission reaction continues. u