Convert Shakes to Zeptoseconds
Convert Shakes (sh) to Zeptoseconds (zs) instantly and accurately.
Conversion Formula
zs = sh × 10000000000000
About Shakes
A shake = exactly 10 ns (10⁻⁸ s) - the informal unit for fission prompt-neutron generation time, coined at Los Alamos during the Manhattan Project (1943-1945). A prompt-neutron generation in a supercritical core takes ~1-10 shakes; a full explosive chain reaction unfolds over ~50-100 shakes. The name alludes to 'two shakes of a lamb's tail'. Still used in reactor physics and weapons-design calculations. 1 shake = 10 ns.
About Zeptoseconds
A zeptosecond (zs) = 10⁻²¹ s. In 2020, physicists at Goethe University Frankfurt measured the H₂ photoionisation time at ~247 zs - the first direct event measurement at this timescale. W-boson lifetime ~300 zs; strong-force quark confinement dynamics ~1-3 zs. These timescales are resolved via the energy-time uncertainty relation and lattice-QCD simulations. 1 zs = 10⁻²¹ s = 1,000 ys.
Quick Reference Table
| Shakes (sh) | Zeptoseconds (zs) |
|---|---|
| 1 sh | 1 × 1013 zs |
| 2 sh | 2 × 1013 zs |
| 5 sh | 5 × 1013 zs |
| 10 sh | 1 × 1014 zs |
| 25 sh | 2.5 × 1014 zs |
| 50 sh | 5 × 1014 zs |
| 100 sh | 1 × 1015 zs |