and for most of the lines the parameters were calculated with low-precision atomic energy levels. Only a small fraction of the lines were calibrated empirically. For the purpose of computing a stellar ...

This Perspective explores how the frequency shifts of atomic spectral lines between isotopes can be effective probes of physics beyond the standard model, when measured to high precision using ...

These smaller lasers will enable scalable laser solutions for actual quantum systems, as well as lasers for portable, ...

In 1925, grad student Cecilia Payne first proposed that stars were mostly made of hydrogen and helium and shaped our ...

On the other hand, it seems likely to make a satisfactory distinction between the different atomic and molecular particles which may give rise to the same line on a mass-spectrum a matter of ...

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Abstract: Recently compiled data for the first electron affinity and the first ionization potential are used to obtain values for an atomic electronegativity scale ... These data fit the straight-line ...

Researchers have chemically linked 2D materials using a molecular "velcro," resulting in a device with improved ...

MCS, National University of Sciences & Technology, Rawalpindi, Pakistan. National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan. [2] J. C ...

Atomic clocks, such as those used on the Global ... The iodine frequency references display the very distinct absorption lines of molecular iodine, which can be used as a frequency reference ...

“Affordable” is a mutable term in watch world. For Mark Zuckerberg, net worth $260bn and counting, a million-dollar Greubel ...

1. Atomic Number.—This number is not only of the successive character as indicated in Fig. 1, but is also derived from the relative position of the first line in the X-ray spectra of an element.