Erratum: Fission Time Evolution with Excitation Energy from a Crystal Blocking Experiment [Phys. Rev. Lett. 82, 5012 (1999)]

Long lifetime components in the decay of excited super-heavy nuclei

“…Considering the independent lifetimes of the electron vacancies and of the compound nucleus, sizable probabilities of X-ray fluorescence from the unified atom can only be observed when the compound nucleus lifetime is at least of the same order of magnitude as the vacancy lifetime. Nuclear lifetimes of excited uranium nuclei have been estimated with the fluorescence technique in good agreement [13,14] with those inferred from the blocking technique in single crystals [15]. Since the lifetime of a vacancy in the K shell of a super-heavy atom is of the order of 10 −18 s [16], the multiplicity of X K rays with an energy characteristic of the unified atom provides us with a sensitive probe for long lifetime components.…”

Search for a long lived component in the reaction U+U near the Coulomb barrier

“…Further publications deal "only" with long lifetimes of excited nuclei in the Uranium region. In the reaction 238 U + Si at 24A MeV long lifetimes for excited U-nuclei before scission have been found by Goldenbaum et al, [14] using the crystal blocking technique. Especially for excitation energies below 250 MeV, lifetimes larger than 3 10 −19 s were obtained.…”

How to Use Lasers for Imaging Attosecond Dynamics of Nuclear Processes

“…One exception is the crystal blocking technique used for the measurement of fission times. It has a time resolution between 10 ÿ19 s and 10 ÿ16 s [15]. The measured decay times with this method are much longer than the time scales obtained from indirect techniques [15].…”

“…It has a time resolution between 10 ÿ19 s and 10 ÿ16 s [15]. The measured decay times with this method are much longer than the time scales obtained from indirect techniques [15]. Other decay processes such as neutron and proton emission have been accessed by spectral measurements only [16].…”