Neutron Production in Thick Targets Irradiated with High-Energy Ions
Table 1
The direct measurement of neutron production in THICK Pb-targets irradiated at the Synchrophasotron [11].
(a) The total number of neutrons , generated by one primary ion (1H, 2H, 4He, or 12C) in a very thick lead target ( cm and cm) and moderated within 1 m3 paraffin, was measured by Vasil'kov et al. This work started in Dubna around 1980. The last column gives the ratio of the neutron yields at the energy GeV compared with the GeV.
Ion
Mass
Number of neutrons at 1 GeV per nucleon
Number of neutrons at 3.7 GeV per nucleon
at ( GeV) at ( GeV)
H
1
H
2
α
4
C
12
(b) The total number of neutrons generated by one primary ion (1H, 2H, 4He, or 12C) in a very thick lead target ( cm and cm) and calculated with the model MCNPX2.7a. The last column gives the ratio of the neutron yields at energy GeV and at GeV.