Neutron activation for precise nuclear data

Thermal neutron cross-section and resonance integral of the 186W(n,γ)187W reaction

“…The present result of 37.2 ± 2.1 barn is in good agreement within 5.7% (1r) with the values obtained by De Corte [33], Gryntakis [34], Knopf [35], Simonits [36], Anufriev [37], Heft [38], Gleason [39], Erdtmann [40], De Soete [41], Damle, and Friesenhahn [43]. On the other hand, the measurements obtained by Karadag [1], De Corte [30], Kafala [3], Gillette [2], Hogg [42], Lyon [44], Pomerance [45], and Seren [46] differ by more than 5.7% from the present result. In addition, the evaluated thermal neutron cross-section values for the 186 W(n, c) 187 W reaction, 37.5 barn of ENDF/ B-VII.0 [29], 39.45 barn of JENDL-3.3 [14], 38.27 barn of BROND-2 [31], 37 ± 2 barn of Holden [32], and 37.9 ± 0.6 barn of Mughabghab [5] are agreed with the present result.…”

“…4, the experimental and the evaluated values for the thermal neutron cross-section of the 186 W(n, c) 187 W reaction are varied from 33 barn [2] to 42.8 barn [3]. The weighted average of the thermal neutron cross-section for the experimental values included the present result is 38.1 ± 0.3 barn.…”

“…doi:10.1016/j.nimb.2008.02.021 1940 to years 1990, and there is only one measurement carried out recently, in 2004 by Karadag and Yü cel [1]. The measured thermal neutron capture cross-section for the 186 W(n, c) 187 W reaction varied from 33 barn [2] to 42.8 barn [3]. The measured resonance integral also varied from 318 barn [2] to 534 barn [4].…”

Absolute intensities of the γ-ray emissions originating from the electron capture decay of 153Gd

“…Kafala [32] et al, are derived values which we suggest should be omitted from any new evaluation. The current evaluation reports the Geidelman value as described by Chechev [28].…”

“…A new value of the absolute intensity for this nuclide can be calculated by using a weighted average of the reported values of the absolute intensities which are not reliant on previous p γ measurements [28][29][30][31][32]. The work of Laurec [31] differs in that an electron spectrometer was used to measure the internal conversion coefficients, which were then used to calculate the absolute intensities.…”