24
K. Hashimoto
Fig. 2.9 Comparison of
respective prompt-neutron
decay constants obtained
from Rossi-α analyses under
pulsed spallation and
inherent source (Ref. [1])
present decay constant is in poor agreement with the previous one. This disagreement could be resolved by applying the masking technique, as shown in Fig. 2.10.
Except for counter B4, the decay constant obtained from the present analysis with the
masking technique is in good agreement with that done from the previous analysis.
The counter B4 placed far from the fuel region and closely to the neutron source
derives a large decay constant of source neutrons in reflector. As shown in Fig. 2.5,
the decay constant obtained from the present Feynman-α analysis, except for counter
Fig. 2.10 Effect of masking
data around peaks on
prompt-neutron decay
constant obtained from
Rossi-α analysis under
pulsed spallation source
(Ref. [1])
K. Hashimoto
Fig. 2.9 Comparison of
respective prompt-neutron
decay constants obtained
from Rossi-α analyses under
pulsed spallation and
inherent source (Ref. [1])
present decay constant is in poor agreement with the previous one. This disagreement could be resolved by applying the masking technique, as shown in Fig. 2.10.
Except for counter B4, the decay constant obtained from the present analysis with the
masking technique is in good agreement with that done from the previous analysis.
The counter B4 placed far from the fuel region and closely to the neutron source
derives a large decay constant of source neutrons in reflector. As shown in Fig. 2.5,
the decay constant obtained from the present Feynman-α analysis, except for counter
Fig. 2.10 Effect of masking
data around peaks on
prompt-neutron decay
constant obtained from
Rossi-α analysis under
pulsed spallation source
(Ref. [1])