Assertion: decay's neutron | /r/HasAspect | mean lifetime of 880.2±1.0
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text: Outside the nucleus, free neutrons are unstable and have a mean lifetime of 880.2±1.0 s (about 14 minutes, 40 seconds); therefore the half-life for this process (which differs from the mean lifetime by a factor of ln(2) = 0.693) is 610.1±0.7 s (about 10 minutes, 10 seconds).