The （n,2n） cross- section for <sup>23</sup>Na have been measured by the activation method in the energy range of E<sub>n</sub>=13.3—18.5 MeV. Monoenergetic neutrons were obtained from T（d,n...The （n,2n） cross- section for <sup>23</sup>Na have been measured by the activation method in the energy range of E<sub>n</sub>=13.3—18.5 MeV. Monoenergetic neutrons were obtained from T（d,n） <sup>4</sup>He reaction at E<sub>d</sub>=2.3 MeV. The induced specific activities were detected by a coincidence counting setup. For comparison, the other measured, evaluated and calculated data from E<sub>n</sub>=12—20 MeV are also given.展开更多
The publisher regrets that some misprints appeared in the formula for the correction factork on page 343.It is reprinted correctly as the following:k=n(1-e<sup>-λ（t<sub>1</sub>-t<sub>0</su...The publisher regrets that some misprints appeared in the formula for the correction factork on page 343.It is reprinted correctly as the following:k=n(1-e<sup>-λ（t<sub>1</sub>-t<sub>0</sub>）/n</sup>)/e<sup>λ（t<sub>1</sub>-t<sub>0</sub>）</sup>-1·(sum from i=1 to n N<sub>ai</sub>e<sup>iλ（l<sub>1</sub>-l<sub>0</sub>）/n</sup>)/sum from i=1 to n N<sub>ai</sub>展开更多
文摘The （n,2n） cross- section for <sup>23</sup>Na have been measured by the activation method in the energy range of E<sub>n</sub>=13.3—18.5 MeV. Monoenergetic neutrons were obtained from T（d,n） <sup>4</sup>He reaction at E<sub>d</sub>=2.3 MeV. The induced specific activities were detected by a coincidence counting setup. For comparison, the other measured, evaluated and calculated data from E<sub>n</sub>=12—20 MeV are also given.
文摘The publisher regrets that some misprints appeared in the formula for the correction factork on page 343.It is reprinted correctly as the following:k=n(1-e<sup>-λ（t<sub>1</sub>-t<sub>0</sub>）/n</sup>)/e<sup>λ（t<sub>1</sub>-t<sub>0</sub>）</sup>-1·(sum from i=1 to n N<sub>ai</sub>e<sup>iλ（l<sub>1</sub>-l<sub>0</sub>）/n</sup>)/sum from i=1 to n N<sub>ai</sub>
