Release that Witch

The neutron source can be understood as a catalyst for fission. With the extra neutrons it provides, even uranium 235 below the critical mass can be efficiently split. .

In theory, the strontium and radium separated from the uranium mine can form a neutron source with strontium. There is no technical problem. It is purely the use of strontium to release a large number of neutrons when bombarded by a particle. It only takes effect when it is put together. All three are naturally occurring substances, and their feasibility is undoubtedly much higher than those of artificial elements that are extremely difficult to serve or require complex processes to produce.

As for Roland, he chose 钋 instead of radium. It is purely for safety reasons. The half-life of 钋210 is short, but it is basically a decay, and the gamma photon yield is extremely low. In other words, as long as it does not eat, it is almost as safe as uranium. Radium is different, whether it is the subsequent decay of the suffocating gas or the gamma photon emitted by itself, it is a safety hazard that cannot be ignored. In order to avoid accidents during the experiment, the 钋-铍 neutron source became the most suitable choice.

In addition, the yttrium element also has the property of reflecting neutrons, and if it is 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, even the most simple and reliable gun-type structure can achieve good results.

However, cockroaches are widely found in emeralds. Such distinctive minerals save the effort to find water in the Aqima Mountain. As long as the news is released through the merchant channel, it can be widely acquired in the four kingdoms.

Roland is very clear about the technical level of the winter city. The principle of radiation is simple. However, the utilization rate of each increase is a threshold, from 1% to over 90%. There is no need for theoretical calculation and experimental correction. If the high-efficiency release of energy is not achieved, it will not be possible to miniaturize the weapon, and it will also waste a lot of weapons-grade uranium that has been accumulated. Without Lucia, the loss of refining is an insurmountable peak.

However, in the same way, the handcuffs are not just a joke in the case of loss or no loss. The technical thresholds vary widely, but the principle is consistent. Thanks to the inherent advantages of chemical energy conversion to chemical gunpowder, even if only 1% of uranium participates in fission, its power is enough to reverse the situation.

In the face of this battle for life and death that determines the fate of the community, he will do everything he can.

Moreover, stealing the fire in such a wild era and bringing people closer to the sun is not a romance in itself?

As long as there is a chance, he is willing to give it a try.

"Good, just keep it," Roland patted Lucia's head. "When all the lead cabinets are full, you can start the formal test."

"Yes, Your Majesty!" Lucia was very energetic.

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

At the same time, there is no winter city, the empty knight college.

This piece is located in the west of the new research institute. It is also a quiet area. It is a day for students to take a vacation. Most people leave the courtyard early and enjoy the time of reunion with their families, but Gourde is an exception.

"Upward, pressure bar!"

"Sidewind, roll!"

He sat on the simulated bridge, set the wind direction for himself, and responded according to the regulations in the Flight Manual. The wood rod made a squeaky sound, like an old and disrepaired water. car. The temperature in the training room was quite stuffy. After a long practice, the back of his body was soaked with sweat, and the chin was dripping from time to time, and it was scattered on the simple "dashboard".

Until the grip slipped, Goode stopped to move and leaned back on the chair.

After nearly half a year of study, he is not the first out-of-the-box doorman. The "Flight Manual" written by His Royal Highness Princess does not say that it is backwards. The basic operation can be said to be all printed in my mind. From the very beginning, when I boarded the bridge, I was so busy that I could use my password to close the eyes. If I ordered myself, I didn’t even have to say anything. As long as I had a thought, my body would react in the first place.

But can this make you fly?

No matter how you imagine, he can't outline the wind in the brain. Capturing the flow direction and size of the wind, feeling the posture and tremor of the body, and then applying the coordinated operation force. This is the original words in the manual, but he does not know what it feels like. Whether it is pulling half or pulling the bottom, the bridge 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 exercise is, the more frustrated the old.

Just as he was upset, the door of the training room suddenly slammed open.

"You really are here"

"How, I guess it is right?"

Goode went back and looked at the two people who accidentally looked into the room. They were the same team of Finchem and Heinz. "How are you..."

“Don’t take advantage of vacations to find fun?” Fingin whistled. “Because the fun is in college.”

"It's you, there is no family. You don't have a lovely sister?" Heinz stepped forward and hooked his neck. "She also told me not to be tired, hehe... so good."

Goode’s look suddenly tightened. “Wait, have you gone to where I live?”

"Crap, or where are we going to find you?" Finkin raised an eyebrow at him. "She is called Rachel, what about introducing us?"

"Don't think about it," Goode looked back at the other side.

"Do you think that we are not in sufficient condition," Finchem disagreed. "At least I have a formal residence in Chishuihe Community!"

Goode was silent for a moment, and finally he shook his head helplessly. "It has nothing to do with you, but my sister... Rachel her own problem. You don't want to be with her."

"Why? I think she is pretty good," Heinz did not understand.

"Speaking to listen?" Finkin also looked curious.

"Don't ask this," Goode didn't have a good air. "Say something else, what did you mean before, what do you mean?"

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

Goode couldn't help but hold it. "What are you talking about?"

"I saw it when I climbed the wall a few days ago," Finchem said with a slightly smug smile. "There were several new planes in the flight yard. Although they were covered with cloth, they looked at the princess. The unicorn driven by His Royal Highness is similar. That is, it is the plane for us!"

"A few days ago? Why didn't you say that at the time?"

"I am not afraid that you are over-excited and leaked the news." He shrugged. "And today is a holiday, there are only a few people in the college, it is the opportunity to sneak into the real thing!"

"You are crazy!" Goode didn't dare to set the channel. "Without permission, we can't enter the flight field at will!"

"Will those soldiers not let you in." Finnish gave him a blank look. "Of course, it's the other way, and it doesn't go through the flight."

"but……"

"We just have to take a look at it," Heinz also helped. "You should feel it. Your wife, Tilly, has a lot of smiles recently. The training is also strict. If you go on like this, you may have to wait." It takes a month or two to really touch it. Compared to this simple wooden table, don't you want to see in advance what the plane we are going to drive looks like?"

"If you don't want to go, let's take a step first." Finkin squeezed his eyebrows.

Goode hesitated for a long time, and his mind echoed the boring squeaking sound of the wooden pole, and he couldn’t feel the progress anyway. He finally bit his lip and nodded. "I go, lead the way." Let's go."