Neon, liquid

Tchouar, N. Ould-Kaddur, F. Levesque, D., Computation of the properties of liquid neon, methane, and gas helium at low temperature by the Feynman-Hibbs approach, J. Chem. Phys. 2004,121, 7326-7331... 

Thirumalai, D. Hall, R. W. Berne, B. J., A path integral Monte Carlo study of liquid neon and the quantum effective pair potential, J. Chem. Phys. 1984, 81, 2523-2527... 

Sese, L. M., Feynman-Hibbs quantum effective potentials for Monte Carlo simulations of liquid neon, Mol. Phys. 1993, 78, 1167-1177... 

Consider H20 and liquid neon, both of which have eight electrons in the valence shell. However, there the similarity ends. Describe the properties that are different and explain the characteristics of the molecules that give rise to those properties. 

Collision-induced absorption of hydrogen deuteride dissolved in liquid neon. Phys. Rev. Letters, 92 023002, 2004. 

Ne (liq.). Vapor pressure data for liquid neon were reported by Cath and Onnes,1 Crommelin,5 Onnes and Crommelin,2 Crommelin and Gibson,1 Clusius,1 Verschaffelt,2 and Mathias, Crommelin, and Onnes.3... 

CaF2 beamsplitter, compensators and external window Liquid neon (detector)... 

By performing MD simulations of ND3 at ambient temperatures, using a fully flexible model and calculating the EFG for randomly chosen ammonia clusters we were able to obtain results -3.67 MHz and 245 kHz, respectively at 271 K. The results were obtained after increasing the cluster size to full convergence and at the MP2 level of approximation, corrected with full Cl values. Similar calculations [45-48] have been reported for liquid water and for Ne in liquid neon with very good results. 

The cell is also admirably suited to free radical studies in the liquid phase at low temperatures. Flash photolysis or steady-state photolysis may be used, depending upon the chemical lifetime of the free radical. Pulsed or steady-state x-ray excitation may prove advantageous here, since penetration of the radiation into the solution is required. In these heavy-atom solvents much of the energy can be absorbed by the solvent and gently transferred to the solute. Experiments using liquid neon, hydrogen, or even liquid helimn as solvents may be possible when pulsed electron beams are used. Solutes in these cases may be atomic hydrogen, excited states of helium atoms or molecules, and possibly ionic species. 

U.S. Pat No. 6,578,368 [51] discloses a method for cooling extruded and molded cellulosic-polymer composites, among other plastics and plastic compositions the said method uses cryogenic fluid with a temperature below about 250° F, such as liquid oxygen, liquid nitrogen, liquid neon, liquid hydrogen, and liquid helium. 

Figure 17. Plot of the centroid velocity correlation function for liquid neon. The solid line is the CMD result calculated with the centroid pseudopotential approximation, while the dashed line is the classical MD result. The self-diffusion constant is proportional to the time integral of the centroid velocity correlation functions.

If liquid neon contacts the skin, flush the affected area with water. If extensive burns result, contact a physician,... 

Similar to the liquid-nitrogen loops, this apparatus is based on the double-circuit principle. The refrigerating circuit uses hydrogen, includes a liquefier, and is entirely closed. The refrigerated circuit is a liquid-neon bath in which the samples are immersed. 

It is easier to remove samples in a bath of liquid neon inside an uninsulated container since the heat of vaporization per unit volume of neon is 3.5 times larger than that of hydrogen. 

Fig. 1. General diagram (1) gas ballast (2) compressors (3) liquefier (4) liquid-hydrogen transfer line (5) automatic by pass valves (6) pipeline joint (7) pipeline joint (8) liquid-nitrogen storage tank (9) corn-pressed hydrogen reserve (10) immersed part of the loop (11) condensing area (12) liquid-neon-bath.

Question by W. Weleff, Aerojet-General Corporation Are you taking the irradiated specimens to a hot cell How do you obtain the desired properties of the irradiated specimens at room or liquid-neon temperatures ... 

The commercial distribution of liquid neon, an inert cryogenic fluid with a boiling point of 27.2°K, began in 1960. The slow but steady usage growth since that time is due to three basic advantages possessed by liquid neon ... 

Liquid neon is a less expensive refrigerant, on a cost per heat of vaporization basis than liquid helium, and since it is inert, it is less hazardous than liquid hydrogen. 

Liquid neon, with 97.2 Btu/liter, has a higher heat of vaporization for an equal volume than does either liquid helium, with 2.4 Btu/liter, or liquid hydrogen, with 29.8 Btu/liter. This consideration is very important for applications having limited available space. 

Precise temperature control can be achieved easily by varying the saturation pressure of liquid neon. In the 32°-40 K temperature range, an equilibrium pressure change of 10 psi changes the saturation temperature an average of only 0.5 °K. 

Handling techniques for liquid neon are essentially the same as would be used for liquid helium since both are inert, capable of freezing air, and high-valued. 

The 15 liters/hr of liquid neon produced by this cycle is continuously drained from the condenser and stored in well-insulated containers. The normal storage loss of these containers, approximately 0.5 liquid liter or 20 NTP gaseous ft /day, is collected in a gasholder, compressed into cylinders by a diaphram type of compressor which eliminates product leakage and contamination, and is returned to the crude rack for reliquefaction. 

Answer by Author At the present time we do not have accurate analysis of the helium content of the liquid neon, but the available data indicate that the helium content is normally less than 100 ppm. 

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