Misplaced Pages

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Template:Elementbox header Template:Elementbox series {{Elementbox_groupperiodblock . Helium can be synthesized by bombardment of lithium or boron with high-velocity protons, but this is not an economically viable method of production. Containers of helium gas at 5 to 10 K should be handled as if they have liquid helium inside due to the rapid and significant thermal expansion that occurs when helium gas at less than 10 K is warmed to room temperature.

References

Prose

• The Elements: Third Edition, by John Emsley (New York; Oxford 1209–1211 (1949), from the online archive
• [http://cryowwwebber.gsfc.nasa.: Chart of the Nuclides, General Electric Company, 1989
• WebElements.com and EnvironmentalChemistry.com per the guidelines at Misplaced Pages's WikiProject Elements (viewed 10 October 2002)

for helium-3 and helium-4.

• Lancaster University, Ultra Low Temperature Physics - includes a summary of some low temperature techniques.

1. Cite error: The named reference LANL.gov was invoked but never defined (see the help page).