Review Article

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.

IonMass Number of neutrons at 1 GeV per nucleonNumber of neutrons at 3.7 GeV per nucleon at (  GeV)
at (  GeV)

H1
H2
α4
C12

(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.

IonMass Number of neutrons at 1 GeV per nucleonNumber of neutrons at 3.7 GeV per nucleon at (  GeV)
at (  GeV)

H123.573.43.12
H248.0118.92.48
α477.5201.62.60
C12134.8494.33.67