Measuring the cross section of sup 1 sup 2 sup 4 Xe(n, 2n) sup 1 sup 2 sup 3 Xe

The cross sections of sup 1 sup 2 sup 4 Xe(n, 2n) sup 1 sup 2 sup 3 Xe are measured at E sub n =12.50, 13.55, 13.88, 14.00 and 14.84 MeV with active method. The final result is given after the influence from geometrical form of gas was corrected, comparing with the results made by foreign labs. The curves that the cross sections of sup 1 sup 2 sup 4 Xe(n, 2n) sup 1 sup 2 sup 3 Xe change with neutron energy are given