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Liquid helium has many uses in the medical and laboratory industry. Liquid helium with a temperature of -269 degrees Celsius is the only coolant that can be used in superconductor industries. One of its applications is to keep the iron part of the device and the spectrometer cool. Monthly Zagrass's mobility with the relevance of our own power to make the most of the masses and the tests in the closet. Enter the extent of the extent and the factors. Containers for carrying liquid helium, which are called (rotary) can be provided in 250 and 400 liter volumes.
Liquid helium and helium liquefaction
At standard pressure, liquid helium can appear at a temperature lower than -270 degrees Celsius or 4 Kelvin, and at higher temperatures, the helium element exists in gaseous form. Of course, changing the pressure can change this temperature. That is, at higher pressures, despite the high temperature, helium can be observed in liquid form.
Helium was first liquefied on January 10, 1908 by a Dutch physicist named Ons at Leiden University in the Netherlands. At that time, helium was an unknown element and its mass spectrum had not yet been determined. In recent decades, helium gas has been used as a coolant in devices such as MRI, NMR, and MEG, as well as for laboratory instruments such as low-temperature spectroscopy.
Characteristics of liquid helium
The liquefaction temperature of helium is very low because the interaction of helium atoms with each other is weak. Interatomic forces in helium do not tend to interact much because helium is a noble and non-reactive gas. This reluctance to cause quantum physics is also less than expected. The atomic volume in helium is small, and therefore in liquid helium, the energy level decreases due to the large distance between the atoms. Due to the large distance between the atoms, the tendency to interact is less than expected.
Due to the very weak interatomic forces in helium, this element can be in liquid form at atmospheric pressure below the condensation point to zero Kelvin. Solid helium can only be formed at very low temperatures and high pressures. At a temperature lower than the condensation point, helium turns into a superliquid.
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