Cross section of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>27</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>(n,2n<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>26</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Al</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">g</mml:mi><mml:mo>.</mml:mo><mml:mi mathvariant="normal">s</mml:mi><mml:mo>.</mml:mo><mml:mn /></mml:mrow></mml:msub></mml:mrow></mml:math>near 14 MeV
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説明
The total cross sections for the /sup 27/Al(n,2n)/sup 26/Al/sub g.s./ (T/sup 1/2/ = 7.2 x 10/sup 5/ yr) reaction have been measured near the threshold energy. The data show a steep energy dependence. The cross sections in the d-t neutron energy range are several times smaller than those of the theoretical prediction by the Blatt and Weisskopf formula and that in the data file, which is commonly used to calculate activation in fusion materials. The calculation in the partial statistical model, in which the intermediate spin states are limited, reproduces the experimental results well.
収録刊行物
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- Physical Review C
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Physical Review C 35 2327-2329, 1987-06-01
American Physical Society (APS)
