M. Klintefjord

La137,138,139(n,γ) cross sections constrained with statistical decay properties of La138,139,140 nuclei

CITATION: Kheswa, B. V., et al. 2017. ¹³⁷,¹³⁸,¹³⁹La(n,γ) cross sections constrained with statistical decay properties of ¹³⁸,¹³⁹,¹⁴⁰La nuclei. Physical Review C, 95(4):1-9, doi:10.1103/PhysRevC.95.045805.

Statistical properties of Pu243 , and Pu242(n,γ) cross section calculation

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.

Experimental level densities of atomic nuclei

Abstract.It is almost 80 years since Hans Bethe described the level density as a non-interacting gas of protons and neutrons. In all these years, experimental data were interpreted within this picture of a fermionic gas. However, the renewed interest of measuring level density using various techniques calls for a revision of this description. In particular, the wealth of nuclear level densities measured with the Oslo method favors the constant-temperature level density over the Fermi-gas picture. From the basis of experimental data, we demonstrate that nuclei exhibit a constant-temperature level density behavior for all mass regions and at least up to the neutron threshold.

Level densities and thermodynamical properties of Pt and Au isotopes

The nuclear level densities of

Energy dependence of the prompt γ -ray emission from the (d,p) -induced fission of U ∗ 234 and Pu ∗ 240

^{194-196}

Completing the nuclear reaction puzzle of the nucleosynthesis of Mo 92

Pt and

Lifetime measurements in Nd138

^{197,198}

The Statistical Properties Of 92Mo And Implications For The p-process

Au below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature description. Each group of isotopes is characterized by the same temperature above the energy threshold corresponding to the breaking of the first Cooper pair. A constant entropy excess

Structure of low-lying states in 140Sm studied by Coulomb excitation

\Delta S=1.9

Structure of low-lying states in Sm 140 studied by Coulomb excitation

and