JAEA-Conf 2011-002 - 日本原子力研究開発機構
JAEA-Conf 2011-002 - 日本原子力研究開発機構
JAEA-Conf 2011-002 - 日本原子力研究開発機構
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<strong>JAEA</strong>-<strong>Conf</strong> <strong>2011</strong>-<strong>002</strong><br />
4. Results and Discussion<br />
The neutron capture cross sections of 93Zr were derived in the energy range from 0.01 eV<br />
to 5 keV as shown in Fig. 1. In the thermal energy region, the present results are close to the<br />
previous value by Nakamura et al.[5]. However, there is an obvious discrepancy between the<br />
values of JENDL-4.0 [19] and the present data. In the keV region, the averaged cross sections<br />
by Macklin [3] are in agreement with the present data. Moreover, the resonance at 14 eV was<br />
newly found.<br />
The neutron capture cross sections of 99Tc were derived in the energy range from 0.01 eV<br />
to 1 keV. The relative cross sections were normalized to the value of JENDL-3.3 at the<br />
thermal energy. The comparison of the present results with the previous data by Kobayashi et<br />
al. [20] and the evaluated data of JENDL-3.3 is shown in Fig. 2. It is found that the signal-tonoise<br />
ratio has been improved remarkably compared with the previous data. The evaluated<br />
values of JENDL-3.3 are almost consistent with the present results.<br />
The neutron capture cross sections of 107Pd were derived in the energy range from 0.1 eV<br />
to 300 eV. The relative cross sections were normalized to the values of JENDL-3.3 at the third<br />
resonance peak. The present results are shown in Fig. 3 together with the thermal neutron<br />
capture cross section by Nakamura et al. [6] and the evaluated values of JENDL-3.3 and 4.0.<br />
In the thermal energy region, the present results support the previous value obtained by the<br />
prompt -ray spectroscopy and indicate that the values of JENDL-3.3 are about five times as<br />
small as the present results. However, the modified values of JENDL-4.0 are consistent with<br />
the present data.<br />
Fig. 1 Preliminary results of neutron capture cross sections of 93Zr.<br />
The previous experimental data by Macklin [3], Nakamura et al.[4] and Pomerance<br />
[7,8] and the evaluated values of JENDL-4.0 [19] are plotted together.