Электронный каталог

Статья

Mucciola, R.
Improved *9*4Mo Neutron Resonance Parameters from Neutron Capture and Transmission Measurements at n_TOF and GELINA / R.Mucciola, V.Furman, Y.Kopatch, [a.o.]. – Text : electronic // Physical Review D. – 2026. – Vol. 114, No. 3. – P. 034623. – URL: https://doi.org/10.1103/y9zl-61c5. – Bibliogr.: 61.

We report high-resolution measurements of the *9*4Mo⁢(𝑛,𝛾)⁢*9*5Mo cross section in the neutron energy range from a few eV up to about 250 keV, performed at the n_TOF facility (CERN), and of the *9*4Mo ⁢(𝑛,tot) cross section up to 32 keV, measured at GELINA (JRC Geel). A combined 𝑅-matrix analysis of capture and transmission data yields significantly improved neutron-resonance parameters for *9*4Mo . A total of 186 resonances were observed in this analysis, of which 127 were not present in latest evaluations. The resulting Maxwellian-averaged cross section at stellar temperatures relevant to the slow neutron-capture process (𝑠-process) is approximately 25% lower than previous evaluations and literature values. To assess the astrophysical impact of the revised cross section, we performed 𝑠-process nucleosynthesis calculations for low-mass asymptotic giant branch stars. Despite the substantial reduction in the *9*4Mo⁢(𝑛,𝛾)⁢*9*5Mo rate, the final yields vary by only 3%–4%. This demonstrates that the isotopic budget of *9*4Mo in asymptotic giant branch stars is primarily governed by the branching flow at *9*4Nb rather than by the neutron-capture destruction on *9*4Mo itself. The new cross section thus helps disentangle nuclear cross-section uncertainties from branching-flow effects in the 𝑠-process production of *9*4Mo .



ОИЯИ = ОИЯИ (JINR)2026