The nuclear level density and γ-decay strength of 192 Os have been extracted using particle-γ coincidence data from the 192 Os (α, α γ) 192 Os reaction by means of the Oslo method. The level density is found to be a rather smooth function of excitation energy, approximately following the constant temperature model. The γ-decay strength is compared to photoneutron cross-section data above the neutron separation energy, and to E1 and M1 strengths for nuclei in this mass region derived from primary transitions following neutron capture. Our results are in good agreement with these previous data and draw a consistent picture of the γ-strength function in the range E γ ≈ 1.5 − 6 MeV.Using the measured nuclear level density and γ-decay strength as input to the nuclear-reaction code TALYS, we provide the first experimentally constrained Maxwellian-averaged cross section (MACS) for the 191 Os(n, γ) 192 Os reaction relevant to s-process nucleosynthesis. The systematic uncertainties introduced by the normalization procedure of the level density and γ-strength function were investigated and propagated to the calculated Maxwellian-averaged cross section. The obtained result of the Maxwellian-averaged cross section at k B T = 30 keV, σ n,γ = 1134 ± 375 mb, is in very good agreement with the theoretical estimate provided by the KADo-NiS project, giving experimental support to the adopted KADoNiS value. Good agreement is also found with MACS values obtained from other libraries, such as TENDL-2017, ENDF/B-VII.0, and JEFF.

The nuclear level densities (NLDs) and the γ -ray strength functions (γ SFs) of 153,155 Sm have been extracted from (d, pγ ) coincidences using the Oslo method. The experimental NLD of 153 Sm is higher than the NLD of 155 Sm, in accordance with microscopic calculations. The γ SFs of 153,155 Sm are in fair agreement with QRPA calculations based on the D1M Gogny interaction. An enhancement is observed in the γ SF for both 153,155 Sm nuclei around 3 MeV in excitation energy and is attributed to the M1 scissors resonance (SR). Their integrated strengths were found to be in the range 1.3-2.1 and 4.4-6.4 μ 2 N for 153 Sm and 155 Sm, respectively. The strength of the SR for 155 Sm is comparable to those for deformed even-even Sm isotopes from nuclear resonance fluorescence measurements, while that of 153 Sm is lower than expected.