Helium-3 is the lighter cousin of ordinary helium, helium-4. Its atomic nucleus has two protons and two neutrons (hence the 4 after the abbreviation for the element); in helium-3, one of the neutrons ...
Neutral helium microscopy and atom optics constitute an innovative imaging paradigm that exploits low-energy, charge-neutral helium atoms to non-destructively investigate surface properties at the ...
IN a letter published in NATURE of March 6, Prof. Fowler pointed out that a series of “parallelisms” that we gave of lines in the spectra of neon and hydrogen ...
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