Assertion: alpha decay | /r/HasProperty | estimated at δε~1.3×10−44 ev
Facets:
value: respectively
type: MANNER
Source sentences:
text: Even though this value is shorter than the measured half-life of tellurium-128, both alpha decays of bismuth-209 hold the record of the thinnest natural line widths of any measurable physical excitation, estimated respectively at ΔΕ~5.5×10−43 eV and ΔΕ~1.3×10−44 eV in application of the uncertainty principle of Heisenberg (double beta decay would produce energy lines only in neutrinoless transitions, which has not been observed yet).