JAEA-Conf 2011-002 - 日本原子力研究開発機構

JAEA-Conf 2011-002
Fig. 4: The relationship between charge recorded
into an ADC ch and electron equivalent light output.
Fig. 5: Detector response functions of the NE213
scintillator calculated with the SCINFUL-QMD
code.
analysis. The minimum neutron energy determined by the measurement was about 1-2 MeV.
The experimental results of the double differential neutron thick target yields for deuteron induced on
a copper and a titanium targets are indicated in Figs. 7 and 8, respectively. Both neutron energy spectra
for a copper, a titanium and a niobium targets show similar tendencies. The titanium total neutron yield
is higher than that of other targets,and the that of niobium target is the least one. By comparison of
incident deuteron energy, neutron thick target yields for 9MeV deuteron induced is much higher than 5
MeV deuteron induced one.
The experimental results were compared with the calculation data of the TALYS and PHITS2 codes and
MS. The calculation values are also shown in Figs. 8 and 9. In TALS calculation, The An-Cai potential[10]
for deuteron incidence was applied. The energy loss of deuteron in the thick target was considered in
the calculation. For PHITS2 calculation, QMD+GEM was adopted. The PHITS2 calculation geometry
is simplified one shown in Fig. 10. For MS calculation, we assumed the single component Maxwellian
distribution.
Fig. 11 shows the comparison of energy integrated differential neutron yield for each target and incident
deuteron energy. It is turned out that lighter nucleus target has a greater tendency to emit neutrons than
heavy nucleus. The direction dependency of 9 MeV deuteron incident neutron yields are larger than 5
MeV deuteron incidence ones
TALYS code generally reproduces neutron energy spectra for copper and titanium target, but for
niobium target,TALYS code reproduces experimental data insufficiently. And TALYS code underestimate
neutron thick target yields for the titanium target above several MeV.
On the other hand, PHITS2 code overestimates neutron thick target yields for the titanium target
above several MeV. However, below several MeV region, PHITS2 and TALYS shows similar tendency.
The MS calculation generally reproduces neutron energy spectra for each target and incident deuteron
energy except for high energy region.
Fig. 6: The results of measured neutron energy spectra
of Am-Be compared with data acquired by Marsh
et al.[9].
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Fig. 7: The results of measured neutron energy spectra
of 252 Cf