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Wile, J.L.; Coffing, D. L.; Bauer, E.T.; Michael, A. L.; Doerner, M. A.; Baldwin, S. P.; Szabo, B.M.; Lott, B.; Quednau, B.; Tōke, J.; Schröder, W.; Souza, R. T. de

doi:10.1103/physrevc.51.1693

Cited by 6 publications

(6 citation statements)

References 16 publications

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“…This may be the reason for the failure of ALICE to predict the high-energy part of the neutron spectrum corresponding to the (α, 3n) process. A better fit to the low-energy parts of the neutron spectra with level density parameter A/11 in this mass region around T = 2.2 MeV is in good agreement with the reported values [26][27][28] and with the theoretical prediction of Shlomo and Natowitz [29].…”

Section: B Interpretation Of Neutron Energy Spectra and Determinatiosupporting

confidence: 88%

Pre-equilibrium and equilibrium emission of neutrons inCd114(α,xn)reactions

et al. 2005

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The 114 Cd(α,xn) reaction has been studied for E α = 35-55 MeV following neutron emission and γ -ray deexcitation. Excitation functions of various (α,xn) channels measured from γ -ray yields have been compared with theoretical calculations based on ALICE-91 and CASCADE codes. Neutron energy spectra were generated from γ -gated neutron time of flight spectra. Neutron energy spectra corresponding to (α,3n) and (α,4n) reactions at E α = 50 MeV have been theoretically reproduced taking into account the contributions of equilibrated source with level density parameter a = A/11, along with the contributions from the pre-equilbrium process.

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Section: B Interpretation Of Neutron Energy Spectra and Determinatiosupporting

confidence: 88%

Pre-equilibrium and equilibrium emission of neutrons inCd114(α,xn)reactions

et al. 2005

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“…This might be the case for the other reactions reported in table 3. A rough indication of how much the SM branching ratios should be changed in favor of the neutron emission might be taken from the experimental multiplicities [45]. However, since the branching ratios are strongly dependent on the decay step, empirical constant factors to reduce the strengths do not represent a reasonable approach to this problem, and would open the question on how to use these new parameters in the FF channel.…”

Section: Discussionmentioning

confidence: 99%

Evaporation and fission decay of 132Ce compound nuclei at Ex=122 MeV: some limitations of the statistical model

et al. 2011

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Abstract. Light charged particle (LCP) emission in the evaporation residue (ER) and fusion fission (FF) channels have been studied for the 200 MeV32 S+ 100 Mo reaction, leading to 132 Ce composite nuclei at Ex=122 MeV. The main goal was to study the decay of 132 Ce on the basis of an extended set of observables, to get insights on the fission dynamics. The proton and alpha particle energy spectra, their multiplicities, ER-LCP angular correlations, ER and FF angular distributions, and ER and FF crosssections were measured. The measured observables were compared with the Statistical Model (SM). Using standard parameters, the model was able to reproduce only the pre-scission multiplicities and the FF and ER cross-sections. The calculation was observed to strongly overestimate the proton and alpha particle multiplicities in the ER channel. Disagreements were also observed for the ER-LCP correlations, the LCP energy spectra and the ER angular distribution. By varying the SM input parameters over a wide range of values, it is shown that it is not possible to reproduce all the observables simultaneously with a unique set of parameters. The inadequacy of the model in reproducing the ER particle multiplicities is also observed analysing data from the literature for other systems in the A ≈ 150 and E x ≈ 100-200 MeV region. These results indicate serious limitations about the use of the SM in extracting information on fission dynamics.

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Section: B Fission Barrier and Level Density Parameter In Evaporation...mentioning

confidence: 99%

“…To determine the optimal value of r a , we first study the reasonable range of r a . The level density parameter is usually dependent on the nuclear mass number from A/8 to A/12 [6,38,39]. Fig.5 shows the level density parameterã as a function of nuclear mass number A adopting different values for r a ( with B S = B K = 1).…”

Section: B Fission Barrier and Level Density Parameter In Evaporatiomentioning

confidence: 99%