Appendix E: Calibration Values
Table E.1. Calibration Value Chart
Scheme: EC = Electron Capture IT = Isomeric Transition
Notes:
1.
Isotope:
A/B implies that B is in equilibrium with A.
2.
Half life
: s = seconds, m = minutes, d = days, y = years.
3.
Scheme:
E = electron capture, B – beta decay, IT = isomeric transition, A = alpha decay.
4.
Cal Value:
Atomlab dose calibrator dial setting to calibrate for corresponding isotope
5.
Notes:
*H(r) = Half life ratio of daughter over parent, implies daughter is ignored.
** Bremsstrahlung includes low energy photons from electron interaction in saline.
Isotope should be measured in plastic syringe or vial or thin wall glass ampule unless otherwise
stated above.
Calculated or Measured:
C: Calculated with corrected Monte Carlo.
B: Beta MC, response strongly dependent upon measurement geometry; best if Cal Value is
determined using the actual measurement with clinical geometry.
M: Confidence value of a measurement made using the listed dial value.
Nuclide
Dial
Value
Decay
Scheme
Avg Beta
Energy
(keV)
Half-‐Life
Cont. Notes
Ac-‐225
Actinium
36.2
A
10.0d
C
+/-‐ 10% NIST
As-‐76
Arsenic
24.4
B-‐
1068
1.1d
C
+/-‐ 10% NIST
At-‐211
Astatine
61.6
A,E
7.21h
C
+/-‐ 10% NIST
Au-‐198
Gold
24.1
B-‐
406
2.69d
C
+/-‐ 10% NIST
Au-‐199
Gold
46.7
B-‐
87
3.139d
C
+/-‐ 10% NIST
Ba-‐133
Barium
7.4
E
10.54y
M +/-‐ 3%
NIST
Bi-‐212/Tl-‐208 Bismuth/Thallium
3.8
A,B-‐
492 & 560 1.01h
C
+/-‐ 10% NIST
In equilibrium
Bi-‐213
Bismuth
53.5
B-‐
12.3
45.6m
C
+/-‐ 10% NIST
Br-‐75
Bromine
8.3
E, B+
499
1.62h
C
+/-‐ 10% NIST
H(r)=.00056, did not include Se-‐75.
Br-‐76
Bromine
4.4
E, B+
642
16.2h
C
+/-‐ 10% NIST
Br-‐77
Bromine
20.6
E, B+
1.12
2.376d
C
+/-‐ 10% NIST
C-‐11
Carbon
10.1
E, B+
385
20.39m
C
+/-‐ 10% NIST
Cd-‐109
Cadmium
32.0
E
1.267y
M +/-‐ 10% NIST
Ce-‐144/Pr-‐144 Cerium/Praseodymium 57.4
B-‐,B-‐
82 & 1209 285d/17m
C
+/-‐ 10% NIST
Co-‐55
Cobalt
5.6
E, B+
430
17.53h
C
+/-‐ 10% NIST
Fe-‐55 ignored. Contribution is
insignificant.
Co-‐57
Cobalt
33.7
E
271.77d
M +/-‐ 3%
NIST
Co-‐58
Cobalt
11.5
E
70.9d
C
+/-‐ 10% NIST
Co-‐60
Cobalt
5.0
B-‐
96
5.271y
M +/-‐ 10% NIST
Cal values defined relative to Co-‐60
Cr-‐51
Chromium
295.0 E
27.7d
C
+/-‐ 10% NIST
Cs-‐134
Cesium
7.1
B-‐
157
2.06y
C
+/-‐ 10% NIST
Cs-‐137
Cesium
17.1
B-‐
188
30.0y
M +/-‐ 3%
NIST
Cu-‐61
Copper
12.3
E, B+
306
3.408h
C
+/-‐ 10% NIST
Cu-‐62
Copper
9.7
E, B+
1280
9.74m
C
+/-‐ 10% NIST
Cu-‐64
Copper
55.0
B+,B-‐
49.8 & 71 12.701h
C
+/-‐ 10% NIST
Cu-‐67
Copper
43.6
B-‐
142
2.58d
C
+/-‐ 10% NIST
Dy-‐165
Dysprosium
92.8
B-‐
442
2.334h
C
+/-‐ 10% NIST
Includes **Bremsstralung contributions
Expected
Uncertainty
DIAL VALUE LIST FOR 500 CHAMBERS -‐ 8/31/2017
Summary of Contents for ATOMLAB 500
Page 1: ...ATOMLAB 500 DOSE CALIBRATOR OPERATION AND SERVICE MANUAL 086 330 086 332 FN 17 355 9 17...
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