出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：A neutron field is produced by bombarding a lead brick with 500 and 800 AMeV deuterons.
The incoming deuterons break up into protons and neutrons mainly due to Coulomb interaction
with the high-Z target nuclei. The resulting charged products are deflected by a strong dipole
magnet behind the target. The spectrum of the remaining neutrons in forward direction is
measured from 0.1 MeV to 1.5 GeV with the time-of-flight method.
Two neutron dosimeters are tested in the neutron field described above: The extended-range
rem-counter WENDI-2 from Thermo-Electron® Corporation reveals a fluence response of
778 pSv cm2 and 947 pSv cm2 for neutrons of energy 482 MeV and 789 MeV, respectively. A
thermo-luminescence based extended range neutron dosimeter developed at GSI exhibits a
fluence response of 623 pSv cm2 and 634 pSv cm2, respectively. A conventional version of the
passive neutron dosimeter yields dose values which are lower by a factor of 5 demonstrating the
advantage of the extended-range neutron dose equivalent meters.
