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- W2313103597 abstract "The neutron-evaporation residue cross sections ${ensuremath{sigma}}_{2n}$, ${ensuremath{sigma}}_{3n}$, and ${ensuremath{sigma}}_{4n}$ in the hot fusion reaction ${}^{48}mathrm{Ca}{+}^{249}mathrm{Bk}{ensuremath{rightarrow}}^{297}phantom{rule{-0.16em}{0ex}}phantom{rule{-0.16em}{0ex}}{117}^{*}$ are calculated at the compound-nucleus (CN) excitation energies ${E}_{text{CN}}^{*}=35.3$ and 39.3 MeV, by taking the superheavy-region proton magic $Z=126$ and neutron magic $N=184$, within the dynamical cluster-decay model. However, the above-stated production cross sections could not be fitted if the incoming nuclei and/or decay fragments were considered to be spherical. On the other hand, with inclusion of deformation effects up to quadrupole deformations ${ensuremath{beta}}_{2i}$ and with the ``optimum'' orientations ${ensuremath{theta}}_{i}^{text{opt}}$, the ${ensuremath{sigma}}_{2n}$ and ${ensuremath{sigma}}_{3n}$ cross sections were fitted nicely, but ${ensuremath{sigma}}_{4n}$ were still underestimated by about 25$%$, indicating the possibility of some other competing evaporation residue, like ${}^{4}$He decay, contributing to 4$n$-decay cross sections. Also, a possible contribution of a fusion-fission component is predicted which, together with ${}^{4}$He decay, needs experimental verification. Other important results are that (i) the angular momentum does not show any significant influence on the fragmentation path of the $Z=117$ nucleus formed in this reaction, and (ii) the barrier modification is found to be more important for the lower-angular-momentum states, and for the lightest neutron cluster, independent of the CN excitation energy." @default.
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- W2313103597 date "2012-02-06" @default.
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- W2313103597 title "Fusion-evaporation residue as a dynamical decay process in the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msup><mml:mrow /><mml:mn>48</mml:mn></mml:msup></mml:math>Ca +<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msup><mml:mrow /><mml:mn>249</mml:mn></mml:msup></mml:math>Bk<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mo>→</mml:mo></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/…" @default.
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- W2313103597 doi "https://doi.org/10.1103/physrevc.85.024604" @default.
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