Determination of effective resonance energies for the (n,γ) reactions of 152Sm and 165Ho by using dual monitors

Determination of effective resonance energies for the185Re(n,)186Re and187Re(n,)188Re reactions by cadmium ratio method

“…On the other hand, as explained in detail in previous studies, the theoretical approach of Moens [5] (Eq. (2)) does not give accurate and satisfactory results, even current resonance data is used [13,14,16]. The results that are found through this approach are neither correct nor satisfactory, as the approach does not consider the neutron widths.…”

“…The weightedĒ r values are given in Table 3 with up-to-date and previous values derived from two different theoretical calculation models. The calculation procedure used to determine the uncertainty ofĒ r was explained in detail in previous studies [13,14,16]. Considering the uncertainties of the parameters in Eq.…”

“…As noted in the earlier studies [13][14][15][16], R Cd = A − sp / A + sp ratio can be calculated using the specific activities measured in experiments. The self-shielding factors (thermal, G th and epithermal, G epi ) used in Eq.…”

Characterization of neutron flux spectra in the irradiation sites of a 37 GBq 241 Am-Be isotopic source

“…Accordingly, a resonance integral I 0 (a) for a real epithermal neutron spectrum also characterized by a-shape factor [23,24]. The information in detail about a-shape factor were given in our previous works [25][26][27][28]. According to the previous works [29][30][31][32][33], a-shape factor is related to other parameters such as the effective resonance energy ( E r ), resonance integral to thermal neutron cross section ratio, Q 0 (a) (=I 0 (a)/r 0 ) in a real 1/E 1+a epithermal flux distribution:…”

“…To do this, both sides of Eq. (4) is set to an initial a-value and then the procedure is repeated by changing the new a-values until it converges to a constant value, as previously shown [34][35][36].…”