Chapter 104

What happened?

Doesn't make sense?

Liu Chi scratched his hair, turned back to the server workbench and carefully checked the lines on the screen again.

In three hours!

Liu Chi inspected a large circle.

There should be no problem if the two wind system augmentation arrays heighten the magnetic mud.

What's wrong with the bottom? Liu Chi scratched his forehead, leaned back directly on the chair and thought.

Can't this device produce a magnetic field?

......

Liu Chi meditated slowly!

Flux, flux?

Electronic swimming?

According to the electronic principle, the electron has spin angular momentum, and the specific value of spin angular momentum is determined by the spin quantum number of the electron nucleus.

Different types of electron nuclei have different spin quantum numbers:

For an electron nucleus with even mass number and proton number, the spin quantum number is 0, that is, I = 0,

For an electron nucleus with odd mass number, the spin quantum number is a semi integer?

If the spin quantum number is not 0, the mass number is even, the proton number is odd, and the spin quantum number is an integer, the magnetic nucleus is automatically generated.

A ray of light flashed in Liu Chi's brain, and an excited spirit sat up straight!

Magnetic resonance signal?

The frequency of the motion of the electron nucleus is determined by the intensity of the applied magnetic field and the nature of the electron nucleus itself?

Liu Chi's eyes are getting brighter and brighter: that is to say, for a specific electron, the frequency of spin precession of its electron nucleus is fixed in a certain intensity of external magnetic field.

No wonder the moving magnetic field is not detected.

"Pa..." Liu Chi patted his thigh excitedly.

That's the problem.

Now the problem has been found, but how should it be solved?

How to make the electron nucleus move is the key.

According to the principle of electron mechanics, the angle between the magnetic moment of the electron nucleus and the applied magnetic field is not continuously distributed, but determined by the magnetic quantum number of the electron nucleus;

The direction of the magnetic moment of the electron nucleus can only jump between these magnetic quantum numbers, but can not change smoothly, thus forming a series of energy levels.

When the electron nucleus receives energy input from other sources in the external magnetic field, the energy level transition will occur, that is, the angle between the magnetic moment of the electron nucleus and the external magnetic field will change.

This energy level transition is the basis for obtaining magnetic resonance signals.

......

How can I get it?

If the energy level transition occurs in the precession of the spin of the electron nucleus, the energy required for the transition needs to be provided for the electron nucleus, which needs to be provided by an external RF field.

Outfield???

According to the principle of physics, only when the frequency of the external RF field is the same as that of the spin precession of the electron nucleus, the energy of the RF field can be effectively absorbed by the electron nucleus to provide power for the energy level transition.

Therefore, a specific electron nucleus, in a given external magnetic field, only absorbs the energy provided by a specific frequency RF field, which forms a magnetic resonance signal.

However, not all electron nuclei can produce this phenomenon. Electron nuclear energy produces nuclear magnetic resonance because of electron spin.

When the nuclear magnetic moment is in a static external magnetic field, it produces precession nucleus and energy level splitting.

Under the action of alternating magnetic field, spin nuclei will absorb electromagnetic waves of specific frequency and transition from lower energy level to higher energy level to produce specific calibration field.

"Hahaha!!!" Liu Chi could put two eggs in his mouth: "I'm really a genius!"

After calming down, Liu Chi touched his chin and thought: it seems that he has to load an electromagnetic wave device!

The electromagnetic wave device is very simple.

The work indicator light can be directly used as the starting device.

This road should work. Try it first.

Liu Chi immediately sat up straight, opened 3D CAD and directly opened it.

......

Four hours later.

Liu Chi stopped and stared at the computer screen with satisfaction. It should be this time!

Then I think about how to combine these devices to form a whole.

That's it!

Absolutely OK this time!

Because the theory is all right.

If the increasing force field is large enough, it can be reversed. The magic can be changed into a magnetic field force removal device. At that time, it can go directly to heaven without lifting force.

Suspended

Hey, hey, hey! Such black technology must be developed!

Well!!!

But it's not urgent now. When you finish the rice cooker first, you must try it.

You can't do such a funny thing without trying.

Uh

I seem a little hungry!

After returning, Liu Chi felt that his stomach had begun to protest. He picked up his mobile phone and glanced at the time. It was already more than 6 p.m.

Ye Yuxin sent several unread voice messages.

There is also one missed call!

I have to

Looking back, there was no lack of a meal. I don't know if she got off work. Liu Chi directly sent a voice call to Ye Yuxin.

"Fool, you know how to send me a voice! Don't look at the time! " As soon as the voice was connected, ye Yuxin's "roar" came into the mobile phone.

"Er..."

"I think you died in the laboratory. Forget it. You don't come down for dinner at noon or at night." As soon as ye Yuxin heard that Liu Chi didn't speak, he said with a little fire: "fool, are you finished?"

"Almost."

"Then don't hurry down. I'm in the office." Ye Yuxin was a little angry.

“......”

After hanging up the voice, Liu Chi saved some data. After confirming that there was no problem, he went out of the laboratory.

"Give me a laboratory permission." Ye Yuxin's first words at the meeting.

"Ah?" Liu Chi was stunned and said, "I didn't want it for you before. Why do you want it suddenly now?"

"I'm afraid you'll starve to death in the laboratory." Ye Yuxin pretended to be a fierce woman's face: "fool, you are not alone now."

"I know. The main reason is that today's inspiration burst out. Next time, pay attention and give you permission tomorrow. You can't." Liu Chi directly used the boy's ultimate trick against the angry girl, hugged Ye Yuxin and kissed her on the forehead.

"What are you doing, villain!" Ye Yuxin, who was still preparing to repair Liu Chi, didn't know anything and patronized shyly.

"Well, girl, this is a sudden inspiration. I must pay attention now." Liu Chi loosened his arm around Ye Yuxin and said, "let's go and have dinner."

"Hum..." Ye Yuxin took Liu Chi's hand and walked out of the office.

......

"Where shall we eat, Liu Chi?" Ye Yuxin habitually got into Liu Chi's car, closed the door with his back hand, fastened his seat belt and asked.

"Let's go. I took people to a good place, a Hunan restaurant. I went there several times. The dishes there are good."

"OK, but if it's not delicious, I'll beat you."

"Don't worry, it's absolutely safe."

In half an hour.

Times Square.

"Here?"

"Yes, go... Get off!" Liu Chi unfastened his seat belt and opened the door.

"You don't mean the Hunan restaurant on the fifth floor?" Ye Yuxin looked at the familiar place and asked.

"Well, you know?"