Roland picked out a lead box, opened the lid, took the silver and white metal in his hand, and felt its heavy weight - before it was not excited, it was not much different from a piece of pure iron, as long as it was not put into the mouth to lick two bites, it can be regarded as basically harmless.If it were not deeply understood enough, it would be hard to imagine what an amazing power it has in its small body.

It is with this that for the first time, humans have touched the threshold of mass energy transformation.

Compared with all the previous chemical gunpowder, this step can be described as a new step.

Roland roughly counted the number of lead boxes, about 50 or so, leaving the weight of the container, each box according to a kilogram of storage to calculate, is a full 50 kilograms of uranium 235, its purity is close to 100%.

And lead cabinets like this, there is more than one in the room.

If you put them all together...

Maybe the institute is really “high-energy”?

“How can these things become the “flory of the sun” you said before?The Nightinger is curious, "make a special machine, or ignition detonate?"I don't think they can burn."

“Want to know?”Roland couldn’t help but laugh, “Simpler than you think, just pile the pieces of metal in the box together and they automatically emit light and heat.”The uranium in this cupboard alone is enough to raze the winter city to the ground, so Lucia's responsibility is great, in case of a shake-in-

The place suddenly fell into silence.

Lucia covered her mouth, her eyes full of horror.

"No," said Akimar, after a long time, incredulously, "you mean that any careless one might destroy the whole city?"

The Nightingale flashed even more, snatching Roland's lead box back into the cupboard, and then grabbed his hand and dragged it out.

“Wait, what are you going to do?”

“Do you still have to ask?”The Nightingale hurriedly, "Of course, take you out of the city and let people move these things!"Lucia, go and let Wendy know, and call her to the Executive Hall!"

"I... I'm going to find Her Royal Highness Tilly," Achma gritted her teeth, "and only she can call the sleeping spell."

“Stop—I was joking—”

There was a rush of chickens and dogs in the room, and Roland took a long time to calm everyone down.

“Are you sure you’re just kidding?”The Nightingou is not a good airway.

“Cough, of course ... I’m just talking about the principle,” he added, “but it’s not so easy to achieve stimulation, and even if I do my best, it doesn’t necessarily guarantee success.”

Lucia said, "Your Majesty... you have frightened my feet."

"It's not funny," said the Nightingale, glancing at him, "if Wendy and the books hear this, whether it's a joke or not—"

“I’m afraid you’ll be asking for the new institute to move away from Winterfell?”Roland was helpless.

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

"Well, when I didn't say those things before..." he cleared his throat, "and as long as you don't say it, Wendy and the book won't know."

"Maybe a bird has heard."The nightingeons left out the window.

“Cut the news off, a bottle of chaotic drink.”Roland did not hesitate.

“The transaction.”She blinked in front of the three.

Looking at Lucia and Akima, Roland shrugged, "Uh... don't worry, that's part of the joke."

A moment later, the Nightingale returned to the house, “not finding a suspicious target, but paying—”

“It is still valid.”

Her expression finally softened, hunched a small to the side of the chewing fish dry.

"That . . . sire," said Achma, after hesitating, "isn't it all a joke as you said before?"Because when making the rules, you have repeatedly stressed that you pay attention to weight, and in order to confuse or miscalculate, you even control each lead box precisely at four kilograms, and the weighing needs to be accompanied by a container, so as to ensure that the metal blocks in the box are equal to the maximum extent.She paused, “And you said that in the event of an accident at the institute, or if there were signs of someone else breaking in, the first thing to do was to notify the guards of the blockade, and then immediately go back to the castle to report, rather than to enter the courtyard to check the situation.”That proves... they’re dangerous, right?”

Roland looked at her somewhat unexpectedly, “Good observation.You’re basically right — in addition to toxicity, weight is also one of the key elements, and that’s what it’s for the purpose of being placed separately.”It is prudent and meticulous to judge the nature of the extract from the rules and regulations, and it is this carefulness that awakens her ability to trace its origin... "But the weight of light can only endanger the research institute, and if you want to turn it into a weapon against the devil, you need another thing."

“The individual particles?”Aggie quickly reacted.

"Not exactly, but at least half right."

In addition to uranium compounds, it is usually accompanied by a large number of radioactive substances, most of which are secondary products after decay, some have completely lost their radioactivity and become stable, and some are still on the road to long decay.Although the radiotes initially refined the ore in the construction of the temple of the cursed, the basic composition is still roughly the same - this can be seen from the results of Lucia's refinement.

The largest content is uranium 238, although it can not be weapon, but it can be identified by the festival of the magic cube, almost no difference with uranium 235, so they are all sent to the backyard of the North Slope Mountain.

The second is uranium 235, the purity of more than 90% can be regarded as a weapon level, the natural content is very low, only 1% of the natural uranium, so want to take the "bright radiation" route first encountered the first difficulty is refining, and this is most people can not cross a hurdle.

But it is not the most rare - subsequent decay products such as thorium, radium, taro, tao, in theory, a rare race, and Roland needs is the naturally occurring tung nut 210, which is also the most common isotope in the tung-on family.

As a nine-year compulsory education to cultivate the motherland flowers, Roland is familiar with the two elements of radium and tung, the textbook repeatedly mentioned in the Curie, because of the discovery of them and left the annals.Although the half-life of poon 210 was only more than 100 days, and its content was so low that Madame Curie's many extractions had failed, she still pointed out its existence from the powerful radioactivity of the ore dissolution.

Both radium and polonium can be used to create neutron sources – which is also related to the second difficulty of brilliant radiation: detonation.

The principle of the first nuclear weapons is very simple, even simple enough to sum up: nuclide fission releases energy.Specifically, uranium 235, after receiving a neutron, will be excited into unstable uranium 236, and then split into two lighter nuclides and more free neutrons, between which the mass difference is converted into energy.

Obviously, the released neutrons will hit other nuclins, so that they cycle, that is, the chain reaction, and the huge energy that bursts at the same time is the same as the explosion.

But in the microscopic world, the gap between the nuclei is like a throes—and, as written in the textbook, if the atom is a football field, then the nucleus is just an ant above.If you are unlucky, the neutron will soon fly out of the border, and the reaction will stop.To make sure that every ants are hit, it is clear that enough pitches to be piled up on its periphery to ensure that the neutron has an ant across its path, no matter which direction it flies in.

Reflecting on the macroscopic world, it is obvious that “quality” and “shape” are obvious.

In fact, the critical mass is not a fixed value, just like a pitch in a straight line is obviously not as good as a stacked court on the chance of being hit.The exact results required extensive calculations based on their shape, and Roland had heard an anecdote that had led to the failure of the war because someone had miscalculated the data.Of course, as a latecomer standing on the shoulders of giants, he naturally does not have to start from scratch, countless tests have proved that when the object is spherical, the critical mass is the smallest, and uranium 235 is 52 kilograms.

He limited the amount of uranium in each lead box to one kilogram, which is considered prudent enough.

But the so-called critical mass is not fixed, and if the area of the pitch can be greatly reduced, or if there are enough additional neutrons for the nuclide, then the critical value will be greatly reduced.The former is the principle of the implosion bomb - the detonation explosive is arranged on the outskirts of the bomb, and the reactant is squeezed into a place in an instant during the explosion, which increases its density and thus exceeds the criticality.For the existing technology of Winterfell, whether it is calculating the critical mass of irregular monomers or precisely controlling the centrionic detonation of explosives, there are too many difficulties, so Roland will look at the latter -

The neutron source is used to ensure the continuity of the fission reaction.