Concept of transuranic elements

In 1940, E. Macmillan (E.McMilan) and P. Abe Wilson (P.Abelson) identified the first transuranic element; they call this element neptunium -239 (Np 239). It seems that this element will decay into a long- lived isotope of element 94 . I visited New York around Christmas Day. During the period, Fermi and I exchanged in detail the views on the various expected properties of the atomic nucleus with a mass of 239 and an atomic number of 94. Later, this element was called é’š-239 (Pu 239). Our particular interest is the cause, the life of this substance may be longer, fission can occur in slow neutron bombardment. If this is the case, it is possible to provide a replacement for U235, eliminating the need for isotope separation. Of course, in order to raise enough new substances, we have to build a nuclear reactor to make this new material, and natural uranium may be the ideal fuel for this reactor.
The method can be implemented in order plutonium reality, necessary to prepare a sufficient amount of such new artificial element to clear out its nuclear properties, this element is difficult, particularly in the fission neutron bombardment slow Easy level. In the jargon, i.e. it knows fission cross section of slow neutrons. If you figure out that people can use it instead of U 235, you must produce enough of this atomic bomb. This is far from a trivial matter. On the contrary, alternative methods of separating isotopes are certainly extremely difficult and costly. In the first few months of 1941, J.W. J.W. Kennedy, G. T. G. T. Seaborg , A. C. A.C. Wahl and I, using Pulkley's cyclotron, prepared about 1 microgram of Pu 239, proving that the material could be used as a nuclear fuel.
To make an atomic bomb, there are two alternatives: separating the uranium isotopic cable, or using a sufficient amount of the ruthenium composition . Isotopic separation can be accomplished by constructing a large mass spectrometer or by gas diffusion; the production of niobium first requires a nuclear reactor that forms it, and the other is the chemical industry used to separate and purify the material. In order to produce a sufficient amount of plutonium by artificial acceleration of nuclear bombardment of charged particles it is impossible.
Explosive having a U 235 or Pu 239 becomes practical, people have to put them into a suitable form for producing bomb was OK.

Pneumatic System CNC Multi Head Router / ATC CNC Router with 4 Axis Rotary 1530

Multi Heads 5 Axis Rotary Simultaneous CNC Wood Carving Router Machine

Jinan Factory Supply High Quality Woodworking Multi Head CNC Router for Wood Furniture

Multi Workstage, Pneumatic Three Heads, 1325 Wood Working CNC Router

wood turning cnc router (8)

Professional manufacturer for cnc wood engraving engraving cutting cnc furniture machine
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Other Industry: a variety of large-scale relief sculpture, shadow carving, widely used in the craft industry.
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4-axis-cnc-router (38)

1) This 5 axis cnc router machine with 8 rotary axis is with removable table, so, when you cut and engrave the flat / 
     plane, just need to put on this table; when you do the column / round / cylinder, just need to take down the
     moveable table. 

2) Each spindle has two heads with two tools, which is equivalent to Auto Tool Changer

3) Multi spindles can work at the same time,also can work alone, many times increasing inefficiency. can also 

    control the machine heads independently, can use only one head to process and make increasing the working

     area. 

4) This machine is very suitable for furniture bulk production such as desk legs/stair handrails and other column /

     cylinder products,it also can easily engrave 360 degree human body, Buddhist statue, sculpture and other art

     works 

5) Easy-to-operate Taiwan SYNTEC control system

6) Powerful PowerMill software with post processor  

7) Except XYZ and Rotary Axis, the 5th axis is the spindle can swing front and backwhich can do 
more complex work.


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Multi-heads CNC Router

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