fraction
Neutron Shield
Th232 -- (α,n)
S1-thr. low : 30 keVr
0.4
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 59.3 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Neutron Shield
0.35
Th232 -- sp. fission
S1-thr. low : 30 keVr
0.3
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
mult. detectable S2 : 63.71 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Neutron Shield
0.4
U238 -- (α ,n)
S1-thr. low : 30 keVr
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 59.35 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Neutron Shield
0.35
U238 -- sp. fission
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 63.36 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
HV resistor
Th232 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 60.71 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
HV resistor
Th232 -- sp. fission
S1-thr. low : 30 keVr
0.4
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 59.7 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
HV resistor
0.4
U238 -- (α ,n)
S1-thr. low : 30 keVr
0.35
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 60.39 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
HV resistor
U238 -- sp. fission
S1-thr. low : 30 keVr
0.4
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 59.5 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT base
Th232 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 61.32 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
PMT base
Th232 -- sp. fission
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 62.08 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT base
U238 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 61.12 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
PMT base
U238 -- sp. fission
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 62.27 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT electrode
Th232 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 61.14 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT electrode
Th232 -- sp. fission
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 61.55 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT electrode
U238 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 60.91 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT electrode
U238 -- sp. fission
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 61.36 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
PMT glass
0.4
Th232 -- (α ,n)
S1-thr. low : 30 keVr
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 59.02 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT glass
Th232 -- sp. fission
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 60.95 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
PMT glass
0.4
U238 -- (α ,n)
S1-thr. low : 30 keVr
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 59.07 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
0.4
PMT glass
U238 -- sp. fission
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 60.78 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Tank
Th232 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 63.02 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Tank
0.35
Th232 -- sp. fission
S1-thr. low : 30 keVr
0.3
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
mult. detectable S2 : 63.55 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Tank
U238 -- (α ,n)
0.35
S1-thr. low : 30 keVr
S1-thr. high : 100 keVr
0.3
S2-thr. : 2 keVr
mult. detectable S2 : 62.89 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Tank
U238 -- sp. fission
S1-thr. low : 30 keVr
0.35
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.3
mult. detectable S2 : 63.5 %
0.25
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Top flange
0.35
Th232 -- (α ,n)
S1-thr. low : 30 keVr
0.3
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.25
mult. detectable S2 : 63.97 %
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Top flange
0.35
Th232 -- sp. fission
S1-thr. low : 30 keVr
0.3
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.25
mult. detectable S2 : 64.56 %
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Top flange
0.35
U238 -- (α ,n)
S1-thr. low : 30 keVr
0.3
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.25
mult. detectable S2 : 63.96 %
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity
fraction
Top flange
0.35
U238 -- sp. fission
S1-thr. low : 30 keVr
0.3
S1-thr. high : 100 keVr
S2-thr. : 2 keVr
0.25
mult. detectable S2 : 64.12 %
0.2
0.15
0.1
0.05
0
0
2
4
6
8
10
12
14
16
neutron elastic scattering multiplicity