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PREFERRED TERM
SDN:L26::UTBBSeconds  
DEFINITION
  • The duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.
ENTRY TERMS
  • s
NOTE
  • accepted
IDENTIFIER
  • SDN:L26::UTBB
DATE
  • 2014-05-06 09:22:18.0
IDENTIFIER
  • SDN:L26::UTBB
VERSION
  • 2
IN OTHER LANGUAGES
s
URI
http://vocab.nerc.ac.uk/collection/L26/current/UTBB/
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