Equation 1 · Part 2 · The Valley of Stability Is a Fitness Landscape
Symbol R
What this part means
R is part of the quantity the equation computes from the expression on the right.
Its job in the formula
R is part of the quantity the equation computes from the expression on the right.
Full expression→Symbol R→Article meaning
The passage around this formula
…accuracy. A 2020 result from the PENTATRAP collaboration, comparing cyclotron frequencies of a highly charged rhenium ion in two internal states, reports a fractional precision of one part in one hundred billion — R = 110^{-11} — in a single-ion Penning-trap measurement [ 9 ] . The same family of instrument, applied across an isobaric chain rather than within one ion’s internal structure, is how the mass differences that fix nuclear binding energies are actually obtained; Klaus Blaum’s 2006 review of…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
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Sources cited in the surrounding passage
- [9] Detection of metastable electronic states by Penning trap mass spectrometry ↗
- [10] High-accuracy mass spectrometry with stored ions ↗
These citations provide research context; check each source for the exact claim it supports.