Berthold LB 134, Руководство пользователя

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LB 134 11. Appendix
127
LB 1342
6)
Limit
values
1)
Efficiencies, response, calibration factors and
decision thresholds and detection limits
A-100
2)
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
threshold
in
Bq/cm²
5)
Detection
limit
in
Bq/cm²
4)5)
Re-188 b-g 0.50 10 101.1 101.11 0.010 0.010 0.021
Au-198 b-g 0.50 10 37.8 37.77 0.027 0.027 0.056
Tl-201 b-g 0.50 10 1.4 1.39 0.719 0.741 1.521
Tl-204 b-g 0.50 100 37.2 37.15 0.027 0.028 0.057
U-238sec b-g 0.25 1 48.1 48.12 0.021 0.021 0.044
Pu-238 b-g 0.25 0.1 3.6 3.63 0.276 0.284 0.583
Am-241 b-g 0.25 0.1 5.6 5.57 0.180 0.185 0.380
Po-210 a 0.25 1 21.6 21.60 0.046 0.005 0.014
U-238sec a 0.25 1 27.8 27.79 0.036 0.004 0.011
Pu-238 a 0.25 0.1 20.7 20.68 0.048 0.005 0.015
Pu-239 a 0.25 0.1 18.3 18.29 0.055 0.006 0.017
Am-241 a 0.25 0.1 20.6 20.58 0.049 0.005 0.015
Alpha a 0.25 20.0 20.00 0.050 0.006 0.016
1) Limit values taken from the German Radiation Protection Ordinance 2001, Annex III, Table 1, column 4
2) Values relative to the activity and 100 cm² source area (DIN 44801)
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