Statistical gamma-ray emission of gold and its astrophysical implications

Giacoppo, F.; Bello, Frank; Bernstein, L. A.; Bleuel, D. L.; Firestone, R. B.; Görgen, A.; Guttormsen, M.; Hagen, T. W.; Klintefjord, M.; Koehler, P.; Larsen, A. C.; Nyhus, H. T.; Renstrøm, T.; Şahin, E.; Siem, S.; Tornyi, and T.

doi:10.1051/epjconf/20146602041

Cited by 1 publication

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Attempts to verify the most prominent anomaly in 198 Au met with variable success. However, recent (n,γ) [7] and 3 He-induced photon production experiments [8] …”

Section: Introductionmentioning

confidence: 99%

Distribution of total radiation widths for neutron resonances of Pt isotopes

Koehler

Bečvář

Krtička

2015

EPJ Web of Conferences

Self Cite

View full text Add to dashboard Cite

Abstract. High quality neutron capture and transmission data were measured on isotopically enriched 192,194,195,196 Pt and natural Pt samples at ORELA. R-matrix analysis of this data revealed resonance parameters for 159, 413, 423, 258, and 11 neutron resonances for neutron energies below 5.0, 16.0, 7.5, 16.0, and 5.0 keV for 192,194,195,196,198 Pt+n, respectively. Earlier analysis of data on reduced neutron widths, Γ 0 n , showed that the distributions of Γ 0 n for 192,194 Pt deviate significantly from the Porter-Thomas distribution (PTD) predicted by random matrix theory. In this contribution we report on preliminary results of the analysis of distribution of total radiation widths, Γ γ , in 192,194,195,196 Pt+n reactions. Comparison of experimental data with predictions made within the nuclear statistical model indicates that standard models of Photon Strength Functions (PSFs) and Nuclear Level Density predict Γ γ distributions which are too narrow. We found that satisfactory agreement between experimental and simulated distributions can be obtained only by a strong suppression of the PSFs at low γ-ray energies and/or by violation of the usual assumption that primary transitions from neutron resonances follow the PTD. The shape of PSFs needed for reproduction of our Γ γ data also nicely reproduces spectra from several (n,γ) experiments on the neighbor nuclide 198 Au.

show abstract

“…Attempts to verify the most prominent anomaly in 198 Au met with variable success. However, recent (n,γ) [7] and 3 He-induced photon production experiments [8] …”

Section: Introductionmentioning

confidence: 99%