Neutron sources can be understood as catalysts for fission, and with the extra neutrons it provides, even uranium 235 below critical mass can break down efficiently.

In theory, the separated balconium and radium in the uranium mine can form a neutron source with beryllium, which has no technical problem, purely to use the characteristics of beryllium to release a large number of neutrons when bombarded by alpha particles, really as long as they are put together to take effect.All three belong to naturally occurring substances, and their feasibility is undoubtedly much higher than those artificial elements that are extremely difficult to serve or require complex processes to produce.

As for Roland's final choice of balconium instead of radium, purely for safety reasons - although the half-life of tuan 210 is short, it is basically alpha decay, and the yield of gamma photons is extremely low.That is to say, as long as it does not eat, it is almost as safe as uranium.And radium is different, whether it is the subsequent decay of radiant gas, or its own emitted gamma photons, are a security risk that can not be ignored.In order to avoid accidents during the experiment, the tao-bronium neutron source has become the most suitable choice.

In addition, beryllium elements also have the characteristics of reflective neutrons, if used as a shell, it can further increase the utilization efficiency of neutrons.If you use both at the same time, plus a sufficient amount of uranium 235, then even the simplest and most reliable gun structure, can achieve good results.

And beryllium is widely present in emeralds, such a distinctive mineral is to save the Akima trek to the mountains to find the kung fu, as long as through the merchant channels to release the news, in the four kingdoms widely acquired.

Roland is very clear about the level of technology in Winterfell is what degree - the principle of brilliant radiation is simple, but every increase in the utilization rate is a threshold, from 1% to 90%, no need for a large number of theoretical calculations and test correction, if you do not reach the high efficiency of the release of energy, it is impossible to make the weapon miniaturization, but also make it difficult to accumulate the weapons uranium waste.Without Lucia, the loss of refining alone is an insurmountable peak.

But, in the case of loss, or loss, hand rubbing a nuclear bomb is not just a joke.The technical threshold is very different, but the principle is consistent, thanks to the inherent advantage of mass energy conversion for chemical gunpowder, even if only 1% of uranium is involved in fission, its power is enough to reverse the war.

In the face of this life-and-death battle to determine the fate of the people, he will surely do his best.

What's more, in such a wild era, stealing God's fire and bringing people closer to the sun is not a kind of romance in itself?

Whenever possible, he would give it a try.

"Very well, hold on," Roland patted Lucia on the head, "and when all the lead cabinets are full, they'll be ready for formal trials."

“Yes, your majesty!”Lucia is very energetic.

****************************************************************************************************************************************

At the same time, Winterfell, Empty Knight Academy.

The area, just west of the new institute, is also a quiet area that covers a huge area – today is a day of vacation for students, and most people leave the campus early to enjoy their time together with their families, with the exception of Goode.

“The wind, the pressure!”

“Fellow, turn around!”

He sat on the simulated driving table, setting himself the wind direction, and responding according to the regulations on the flight manual, and the wooden pole made a squeaky bite, like an old water truck in disrepair.The temperature in the training room is quite hot, after a long period of practice, he has been soaked in sweat behind his back, and from time to time there are sweatdrops dripping in the chin, sprinkled on the simple " dashboard".

It was not until the grip slipped that Goode stopped and leaned back in his chair to take a breath.

After nearly half a year of study, he is no longer the first outsider who knows nothing, the "flight manual" prepared by Her Royal Highness does not say backwards, and the basic operation can be said to be printed in the mind.From the beginning of the driver's seat when the hands are busy, and now closed eyes can also be operated according to the password, if it is their own order, even do not say exit, as long as a thought, the body will react in the first time.

But can you fly yourself?

In any case, he could not imagine the situation in his head to the wind.“Capture the flow and size of the wind, feel the posture and tremor of the body, and then apply the intensity of the operation coordinated with it” – this is the original sentence in the manual, but he does not know what kind of feeling it is.Whether it is gently pulling half or pulling to the end, the driving station will not give him any feedback, as for the "dashboard" drawn with ink lines, it is more like laughing at his efforts.

The more skilled the movement, the more frustrated the gourd.

Just when he was a little upset, the door of the training room suddenly rattled and pushed open.

“You’re really here—”

“Well, I guess that’s right, right?”

Goode looked back, a little surprised at the two men who had gone into the room—the same squad of Finkin and Heinz, “How are you...”

“Don’t you take a vacation to have fun?”Finkin whistled, "Because the fun is in the academy."

"But you, there is no family, you don't have a lovely sister?"Heinz stepped up to the front and grabbed his neck, "She told me not to get tired, huh... it's great."

Goode suddenly looked tight, “Wait, you two went where I live?”

“Shit, or where are we going to find you?”Finkin raised his eyebrows at him, “Her name is Rachel, how about introducing us?”

“Don’t think about it,” Goode glanced back at each other.

"Do you think that our conditions are not enough," Finkin said, "at least I have a formal house in the Redwater River community!"

Goode was silent for a moment, and at last shook his head somewhat helplessly, “It has nothing to do with you, but with my sister... Rachel’s own problem.”You don't want to be with her."

"Why?"I think she’s pretty good,” Heinz puzzled.

“Listen to me?”Finkin was equally curious.

"Don't ask me that," said Goode, "and say something else--what do you mean by the fun you said before?"

Finkin did not continue to entangle, he lowered his voice and mysteriously said, "Do you want to try the real plane?"

Goode couldn’t help but stupor, “What do you say?”

“What I saw when I climbed the wall a few days ago,” Finnkin said with a slightly proud smile, “has brought in several new planes in the airport warehouse, although it is covered with cloth outside, but in terms of size it is similar to the unicorn driven by Her Royal Highness Princess.”That’s the plane that’s ready for us!”

“A few days ago?Why didn’t you say that then?”

"I'm not afraid you're over-excited to get the news out."He shrugged, "and today is a holiday, there are only a few people in the college, it is the opportunity to sneak in to see its true face!" 」

“You are crazy!”Goode couldn’t believe it, “We can’t enter the airport at will without permission!”

"The soldiers won't let you in, shall they?"Finn looked at him and said, "Of course, going something else, and not going through the field of flight."

“But...”

"We just looked at it," Heinz said, "you should feel it, His Highness Tilly has had a lot less smiles and a lot more rigorous training lately."If so, you may have to wait a month or two to really touch it.Instead of this humble wooden table, don’t you want to see in advance what the plane we’re flying looks like?”

"If you don't go, we'll take a step first."Finkin's eyebrows.

Goode hesitated for a long time, and the dull squeak of the wooden pole when he was teasing, and he could not feel the daziness of progress no matter how he practiced, and finally he bit his lips and nodded, "I'll go, lead the way."