The radioactive half-life of samarium-146 has been measured to the highest accuracy and precision so far. With a half-life of 92 million years, samarium-146 is ideally suited for dating events that occurred early in the history of the solar system.
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Physics World
Half-life measurement of samarium-146 could help reveal secrets of the early solar system
Isotope is extracted from an accelerator target
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A precise proton measurement helps put a core theory of physics to the test: « The standard model of particle physics is confirmed to a tenth of a billionth of a percent. »
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Science News
A precise proton measurement helps put a core theory of physics to the test
After years of confusion, a new study confirms the proton is tinier than once thought. That enables a test of the standard model of particle physics.
Physicists demonstrated a way to use quantum entanglement to halve the measurement time of an ion-based optical clock without compromising its precision. An optical clock based on a pair of calcium ions achieves a given precision more quickly when the ions are entangled.
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#QuantumEntanglement #OpticalClock #CalciumIons #PrecisionMeasurement #ScienceNews
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Physics
Entangled Ions Measure Time Faster
An optical clock based on a pair of calcium ions achieves a given precision more quickly when the ions are entangled.