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Statistical properties of $^{243}$Pu, and $^{242}$Pu(n,$\gamma$) cross section calculation

Abstract : The level density and gamma-ray strength function (gammaSF) of 243Pu have been measured in the quasi-continuum using the Oslo method. Excited states in 243Pu were populated using the 242Pu(d,p) reaction. The level density closely follows the constant-temperature level density formula for excitation energies above the pairing gap. The gammaSF displays a double-humped resonance at low energy as also seen in previous investigations of actinide isotopes. The structure is interpreted as the scissors resonance and has a centroid of omega_{SR}=2.42(5)MeV and a total strength of B_{SR}=10.1(15)mu_N^2, which is in excellent agreement with sum-rule estimates. The measured level density and gammaSF were used to calculate the 242Pu(n,gamma) cross section in a neutron energy range for which there were previously no measured data.
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Submitted on : Friday, November 27, 2015 - 3:44:26 PM
Last modification on : Tuesday, November 30, 2021 - 8:32:05 AM

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T. A. Laplace, F. Zeiser, M. Guttormsen, A. C. Larsen, D. L. Bleuel, et al.. Statistical properties of $^{243}$Pu, and $^{242}$Pu(n,$\gamma$) cross section calculation. Physical Review C, American Physical Society, 2016, 93, pp.014323. ⟨10.1103/PhysRevC.93.014323⟩. ⟨in2p3-01235019⟩



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