WHEN helium at a pressure of about 25 mm. of mercury is excited in such a way as to produce the line spectrum and the band spectrum in comparable intensity, McCallum and Wills1 find that the band ...

When you think of helium, you probably think of blowing up a bunch of balloons. But that's just the tip of the iceberg for what it can be used for. In fact, the balloon market only accounts for 10% of ...

Direct Measurement of the Cosmic-Ray Helium Spectrum from 40 GeV to 250 TeV with the Calorimetric Electron Telescope on the International Space Station. Physical Review Letters , 2023; 130 (17 ...

After a time this gas, when subjected to spectrum analysis, displays the characteristic yellow lines of helium. Ergo, one element, by a mere change of form, appears to have become another and ...

Every element has a unique fingerprint that shows up as dark lines in the spectrum. In the spectra from the gas clouds, the researchers saw only hydrogen and its heavy isotope deuterium, Prochaska ...

Discovered in the 1800s in the solar spectrum, helium has been an element that has eluded humans for centuries. Despite being listed as one of the most abundant elements in the universe, this ...

Collaboration has obtained a high-precision cosmic-ray boron spectrum in the energy range of 10 GeV/n–8 TeV/n, and discovered ...

Helium is the simplest element in the periodic table with more than one particle in its nucleus, yet state of the art theory and experiments on it don't add up.

IN the course of some investigations on the electrical properties of helium at fairly high pressures (about 25 mm. mercury), it was found that, if the gas was excited in such a way as to produce ...