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    Time scale of quasifission from giant dipole resonance γ-ray yield
    Physical Review C (1995)
    Jennifer H. NestlerB. B. BackKlaus Stefan DreseDavid Jonathan HofmanS. SchadmandR. VarmaP. Paul
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    Abstract:
    Giant dipole resonance (GDR) \ensuremath{\gamma} rays were measured in coincidence with reaction fragments in $^{58}\mathrm{Ni}$${+}^{165}$Ho at 368 MeV where deep inelastic scattering and quasifission dominate the reaction. The \ensuremath{\gamma} spectrum associated with deep inelastic scattering events is well fitted by statistical cooling of projectile and target-like fragments with close to equal initial energy sharing. The \ensuremath{\gamma} spectrum associated with quasifission events is well described by statistical emission from the fission fragments alone, with only weak evidence for GDR emission from the mononucleus. A 1\ensuremath{\sigma} limit of \ensuremath{\tau}\ensuremath{\le}11\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}21}$ s is obtained for the mononucleus lifetime which is consistent with the lifetimes obtained from quasifission fragment angular distributions.
    Keywords:
    Giant resonance
    Topics:
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