Zhang Yunfei's helicopter landed steadily on the apron next to the base, and as soon as the plane came to a standstill, a colonel officer walked over quickly and personally opened the hatch for Zhang Yunfei, and Zhang Yunfei walked down steadily.

"Stand upright! Salute!!! ”

With a shout, all the officers and soldiers on this small helicopter airport saluted Zhang Yun together, and everyone's eyes were full of respect and excitement.

Zhang Yunfei's prestige and prestige are not only very high among the broad masses of the people, but also have reached a very high height in the army.

Zhang Yunfei returned a military salute, and then said with a full heart: "Comrades have worked hard!" ”

Zhang Yunfei just looked around, the conditions here are still relatively difficult, this is originally a no-man's land, not suitable for human habitation, however, for the sake of secrecy and security, the base was placed here.

Zhang Yunfei, accompanied by several officers and the person in charge of the base, walked to the base not far away, and through the introduction of the staff around him, the colonel officer just now was the person in charge of the army here, and the person in charge of the base was a middle-aged man in his forties and fifties surnamed Zhong.

"Chief, please!" The person in charge of the base took Zhang Yunfei and others into a surface building, and along the passage, went down to a depth of dozens of meters.

Along the way, Zhang Yunfei watched several laboratories and shook hands with many excited scientific researchers, and the person in charge of the base kept reporting the whole situation to Zhang Yunfei.

Although Zhang Yunfei has not been here in person. However, Zhang Yunfei has seen some information and documents about this base, and even some important documents have been signed by Zhang Yunfei himself, but he did not expect that after coming here to watch it in person, Zhang Yunfei was secretly frightened, the situation here is even better than that reported in the documents and materials, and the scale is also very large.

Here is the construction. At that time, a lot of manpower and material resources were spent. Zhang Yunfei still knew, but he didn't expect that it had only been more than two years since the start of construction. Progress on this scale.

The person in charge of the base was satisfied with Zhang Yunfei. He took the opportunity to report: "Chief." Since Oppenheimer's arrival a few months ago, many problems have been solved. Scientific research is progressing rapidly. ”

Zhang Yunfei nodded, thinking in his heart, Oppenheimer is really a cow, he has really made enough money in this business, and a few warships have been exchanged for such an outstanding talent.

"Let's go! Let's go see Mr. Oppenheimer. ”

Originally, Oppenheimer was going to greet Zhang Yunfei in person, although he was a Jew, but Oppenheimer also knew what it meant to know the grace of encounter.

After coming here, Oppenheimer of course knew that Zhang Yunfei attached great importance to the atomic bomb, not only invested a lot of manpower and material resources, but also equipped himself with a right-hand man, and more importantly, what requirements he had, the central government met them one by one every time.

After working here for a few months, Oppenheimer is now full of energy and energy, which is completely different from the state when he first came to China, and Oppenheimer would like to thank Zhang Yunfei in person for creating such good conditions for his scientific research.

At that time, even in the United States, the United States attached far less importance to itself, and when he first arrived in China, he was not only personally received by Zhang Yunfei, but also entrusted with an important task of appointing himself as the chief scientist of this scientific research base.

Oppenheimer wanted to greet Zhang Yunfei in person, but Zhang Yunfei was afraid of affecting Oppenheimer's scientific research work, so Zhang Yunfei still did not let Oppenheimer interrupt his scientific research work to welcome him.

When Zhang Yunfei saw Oppenheimer, Oppenheimer was wearing a white coat and explaining something to a group of people in a spacious laboratory.

These people, including Chinese and blond-haired foreigners, surrounded Oppenheimer and listened carefully to Oppenheimer's explanation.

Oppenheimer, who was explaining, saw Zhang Yunfei and his party coming, immediately interrupted the explanation, and walked over excitedly, although Oppenheimer and Zhang Yunfei had only met once, but Oppenheimer was very impressed by Zhang Yunfei and had thought of Zhang Yunfei many times.

Walking in front of Zhang Yunfei, Oppenheimer said excitedly: "Oh! Dear Chairman Zhang, it is my honor to meet you again, thank God so much. ”

Oppenheimer spoke a lot in English in one breath, and his gratitude was palpable.

Zhang Yunfei naturally felt Oppenheimer's gratitude, and when he saw Oppenheimer finish speaking, without waiting for the translator next to him, Zhang Yunfei smiled and took the initiative to stretch out his hand.

Oppenheimer was flattered, and excitedly stretched out his hands to hold Zhang Yunfei's hand tightly, Zhang Yunfei smiled and said: "Mr. Oppenheimer, you are still used to coming here, if you have any requirements and difficulties, just tell me." ”

The staff next to him were slightly surprised to see Zhang Yunfei's fluent English, and thought to themselves, Chairman Zhang is also proficient in English, which is really unexpected!

Most of these personnel are not Zhang Yunfei's entourage, Zhang Yunfei's entourage does not feel much strange that Zhang Yunfei speaks fluent English, and those who are familiar with Zhang Yunfei also know that Chairman Zhang can also speak fluent Japanese.

If it is Zhang Yunfei's old subordinates, everyone also knows that in the early days of the Anti-Japanese War, Chairman Zhang relied on his fluent Japanese to go deep behind enemy lines and kill many little ghosts.

Zhang Yunfei and Oppenheimer had an exchange, and it didn't take long for Oppenheimer to talk about his current research work.

Although Zhang Yunfei's understanding of the atomic bomb is much more detailed than that of ordinary people, and he also knows a lot, in this era, there are really few people who can know about the atomic bomb, except for some professional scientific researchers, and some nuclear physicists, etc., but Zhang Yunfei still listened patiently.

Zhang Yunfei listened to Oppenheimer's explanation and had a detailed understanding of the atomic bomb and its development work.

The atomic bomb is one of the nuclear weapons, and it is a weapon of mass destruction that uses photothermal radiation, shock waves, and induced radioactivity from nuclear reactions to cause lethal and destructive effects, as well as to cause large-scale radioactive contamination and prevent the other side's military operations to achieve strategic objectives.

Before introducing the structural principle of the atomic bomb, Oppenheimer first introduced the charge of the atomic bomb to Zhang Yunfei. At present, uranium-235 is mainly used as a charge of atomic bombs, but at present, a large amount of uranium-235 is only available as a fissile material that can be used as an atomic bomb charge.

The scientific research work of the atomic bomb is first and foremost how to obtain a high concentration of uranium-235, before Oppenheimer came, this work was difficult and the progress was slow, after Oppenheimer came, this work has made breakthroughs.

After Oppenheimer came, in order to obtain the high concentration of uranium-235 needed to make the atomic bomb, he immediately adopted the "gas diffusion method", and after many tests and tackle key problems, it finally succeeded, and at present, a lot of high-concentration uranium-235 has been obtained.

With nuclear charges, an atomic bomb explosion can be achieved as long as their volume or mass exceeds a certain critical value. It's just that there is also the question of the triggering of the atomic bomb, that is, how to do it: when it is not needed to explode, it will not explode; When it needs to explode, it explodes instantly.

This is exactly what Oppenheimer and his research team are currently working on, but now that it is in sight, Oppenheimer intends to achieve it by controlling the critical mass or critical dimensions.

How to control the critical mass or critical size, Oppenheimer also had a rough plan, Oppenheimer was ready to use the so-called gun structure.

In later generations, the first atomic bomb used this structure, such as the atomic bomb dropped by the United States on Hiroshima, Japan (codenamed "Little Boy") used a gun structure, weighing about 4,100 kilograms, about 71 centimeters in diameter, and about 305 centimeters long. The nuclear charge is uranium-235 with an explosive power of about 14,000 tons of TNT equivalent.

In principle, the simplest atomic bomb uses the so-called gun structure. Two uranium blocks, both of which are less than the critical mass, are separated by a certain distance and do not cause an explosion, but when they are combined, they are greater than the critical mass and an explosion occurs immediately.

Zhang Yunfei spent half a careful time and patiently listened to Oppenheimer's report, and after the report, Oppenheimer's eyebrows danced, looking very satisfied with his results.

After listening to the report, Zhang Yunfei was naturally very happy, but he didn't expect that the research progress of the atomic bomb was so fast after Oppenheimer came, and he was already studying how to control the explosion, and the purification of uranium-235 has been solved, and a lot of high-concentration uranium-235 has been purified.

Zhang Yunfei's heart was also slightly excited to make such great progress, and he immediately asked: "Dear Mr. Oppenheimer, I am very happy that you have achieved such great results, when will your first atomic bomb be developed?" ”

After listening to Zhang Yunfei's words, Oppenheimer said proudly: "Dear Chairman Zhang, first of all, I would like to thank you for providing such good conditions for our research, and we will work hard to repay your kindness, and we will strive to develop the first atomic bomb within one year." ”

"Good! That's great! Hearing that the first atomic bomb would be developed within a year, Zhang Yunfei was naturally very satisfied and very happy.

Zhang Yunfei thought that when the first atomic bomb was dropped on the battlefield, I don't know what the United States thought, and exchanged such a genius scientist for itself. It is estimated that the United States is in the mood to hit the wall.

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Today's two watches, the second watch is complete, ask for collections, ask for subscriptions, ask for recommended tickets, ask for monthly passes. (To be continued.) )