Berthold LB 134, Руководство пользователя

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LB 134 11. Appendix
125
LB 1342
6)
Limit
values
1)
Efficiencies, response, calibration factors and
decision thresholds and detection limits
ISO 7503-1
3)
Nuclide CH eff
src
in
Bq/cm²
Efficiency
in
%
Response
in
s
-1
Bq
-1
cm
2
Calibration
factor in
s Bq cm
-2
Decision thr.
in
Bq/cm²
5)
Detection limit
in
Bq/cm²
4)5)
I-131 b-g 0.50 10 74.4 63.24 0.016 0.017 0.034
Cs-137+ b-g 0.50 1 70.6 60.01 0.017 0.018 0.036
Pm-147 b-g 0.25 1 28.9 12.27 0.082 0.085 0.173
Sm-153 b-g 0.50 10 84.8 72.06 0.014 0.014 0.030
Er-169 b-g 0.25 100 61.4 26.11 0.038 0.039 0.080
Re-186 b-g 0.50 1 68.1 57.88 0.017 0.018 0.036
Re-188 b-g 0.50 10 75.6 64.24 0.016 0.017 0.034
Au-198 b-g 0.50 10 74.1 63.00 0.016 0.017 0.034
Tl-201 b-g 0.50 10 2.8 2.36 0.423 0.436 0.894
Tl-204 b-g 0.50 100 65.8 55.94 0.018 0.019 0.038
U-238sec b-g 0.25 1 107.3 45.61 0.022 0.023 0.047
Pu-238 b-g 0.25 0.1 7.8 3.31 0.302 0.311 0.638
Am-241 b-g 0.25 0.1 11.8 5.01 0.200 0.206 0.423
Po-210 a 0.25 1 42.3 17.99 0.056 0.006 0.017
U-238sec a 0.25 1 62.0 26.34 0.038 0.004 0.012
Pu-238 a 0.25 0.1 44.5 18.92 0.053 0.006 0.016
Pu-239 a 0.25 0.1 35.9 15.25 0.066 0.007 0.021
Am-241 a 0.25 0.1 43.6 18.51 0.054 0.006 0.017
Alpha a 0.25 40.0 17.00 0.059 0.007 0.018
1) Limit values taken from the German Radiation Protection Ordinance 2001, Annex III, Table 1, column 4
3) Values relative to the surface emission rate and 170 cm² sensitive detector area according to DIN ISO 7503-1
4) Decision threshold and minimum detectable activity (MDA) are in accordance with ISO 11929-1
calculated with a measuring time of 200 s for the background and 30 s for the sample measurement
5) Background count rate used from 0.1 cps for alpha and to 10 cps for beta-gamma measurements
6) Valid from LB 134 software version 1.00