Measurement of cross section and angular distribution for 64Ze(n, α)61Ni by using gridded ionization chamber of Kr(CH4) gas

By using a gridded ionization chamber, the angular distribution and total cross section for 64Zn(n, α)61Ni reaction were measured at 5.0, 5, 7 and 6.5 MeV, and included 10B(n, α)7Li measurement. The neutrons were produced through D(d, n)3He reaction, working gas was Kr + 4.71% CH4. Because using Kr + 4.71% CH4 as working gas, there is no interference from 16O(n, α), the authors got two dimensions events spectrums of the many excited states groups of 64Zr(n, α)61Ni and high excited state of 10B(n, α)7Li clearly at first in the world, the result of measurement show that the distribution of 64Zn(n, α)61Ni was nearly 90 degree symmetric at 5.7 MeV, and obviously backward peaked in the center of mass reference system