Ritverc JSC
RITVERC JSC
10, Kurchatova str., 194223,
St. Petersburg, Russia
Phone: +7 812 297-44-63
Fax: +7 812 297-58-87
Email: info@ritverc.com
Url: www.ritverc.com

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OSGI-RT / OSGI-R

Point gamma sources

Certificates and documentation

  • Pattern approval certificate of measuring instruments RU.C.38.001.A No. 35483 RU
  • Pattern approval certificate of measuring instruments RU.C.38.001.A No. 35483 (extension until 2019) RU
  • Methods of OSGI-R sources verification МП 2104-0001-2009 RU
  • Certificate of conformity No ОИАЭ.RU.012(OC).00106 RU
 

 

Application

Gamma standard sources (OSGI-R-set) are used as working standards for verification and graduation of photon measuring equipment, for certification of measuring methods and measurement accuracy control of photon emission. In particular, the set is intended for testing and calibration of precision instruments, spectrometers and radiometers, ionization chambers and scintillation counters. OSGI-R-set is especially designed for use in testing and calibration of spectrometers used in environmental analysis.

Warning RITVERC gradually take off OSGI-R-sets from production and replace them by OSGI-RT sets. The planned replacement period is until the end of 2020. OSGI-RT sources have the same or better characteristics (depending on the radionuclide). The differences are shown in the table below.

Multinuclide OSGI-RT sources

Features

At least 20 energy lines are required for efficiency calibration of semiconductor detector of HPGe and Ge(Li) types. Source is designed for 2 years useful work.

Advantages

  • All calibration data are acquired in one run. This reduces systematic mistakes, while all components are measured at the same time and exposition.

  • Time saving compare to calibration with single nuclide sources.

Description

The source is produced in the form of a flat round capsule made of aluminum, 25 mm in diameter and 3 mm thick. The source active part of less than 3 mm in diameter is embedded between two polyimide foils with total thickness of 100 ± 10 μm.


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Radionuclide Decay mode Half-life, days Photon energy, keV Probabilities (gamma per decay) Nominal activity, kBq * / ** Exposure dose rate, μSv/h **
22Na EC 950.57 ± 0.23 511 (annihil)
1274.537 ± 0.003		 1.798 ± 0.002
0.99940 ± 0.00014		 1-1000 ≤ 35.0
44Ti EC 21900 ± 15 68.868 ± 0.014
78.36 ± 0.03
1157.020 ± 0.015		 0.930 ± 0.0015 
0.964  ± 0.0011
0.99875 ± 0.0003		 1-300
[1–100]		 ≤ 10.2
[≤ 3.4]
54Mn EC 312.29 ± 0.26 834.838 ± 0.005 0.999746 ± 0.000011 1-1000
[1–100]		 ≤ 14.0
[≤ 1.4]
55Fe EC 1002.7 ± 2.3 (Mn Kα) 5.8988
(Mn Kβ) 6.49-6.54		 0.1656 ± 0.0027
0.0340 ± 0.007		 1-1000
[1–100]		 ≤ 0.02
[≤ 0.002]
57Co EC 271.80 ± 0.05 14.41295 ± 0.00031
122.06065 ± 0.00012
136.47356 ± 0.00029		 0.0915 ± 0.0017
0.8551 ± 0.0006
0.1071 ± 0.0015		 1-1000
[1–100]		 ≤ 1.7
[≤ 0.17]
60Co β- 1925.23 ± 0.27 1173.228 ± 0.003
1332.492 ± 0.004		 0.9985 ± 0.0003
0.999826 ± 0.000006		 1-500
[1–100]		 ≤ 19.0
[≤ 3.8]
65Zn EC 243.86 ± 0.20 511 (annihil)
1115.539 ± 0.002		 0.0284 ± 0.0004
0.5060 ± 0.0022		 1-1000
[1–100]		 ≤ 10.0
[≤ 1.0]
88Y EC 106.625 ± 0.024 898.036 ± 0.004
1836.052 ± 0.013		 0.9390 ± 0.0023
0.9938 ± 0.0003		 1-1000 ≤ 38.8
109Cd EC 461.4 ± 1.2 88.0336 ± 0.0011 0.03626 ± 0.00020 1-1000 ≤ 0.04
113Sn EC 115.09 ± 0.04 391.698 ± 0.003 0.6494 ± 0.0017 1-500
[1–100]		 ≤ 2.2
[≤ 0.44]
133Ba EC 3848.7 ± 1.2 80.9979 ± 0.0011
276.3989 ± 0.0012
302.8508 ± 0.0005
356.0129 ± 0.0007
383.8485 ± 0.0012		 0.329 ± 0.003
0.0716 ± 0.0005
0.1834 ± 0.0013
0.6205 ± 0.0019
0.0894 ± 0.0006		 1-1000 ≤ 8.8
134Cs β- 753.5 ± 1.0 569.327 ± 0.003
604.720 ± 0.003
795.83 ± 0.03		 0.1538 ± 0.0004
0.97650 ± 0.00018
0.855 ± 0.003		 1-300
[1–100]		 ≤ 7.5
[≤ 2.5]
137Cs β- 10990 ± 40 661.657 ± 0.003 0.8499 ± 0.0020 1-1000 ≤ 10.0
139Ce EC 137.642 ± 0.020 165.8575 ± 0.0011 0.7990 ± 0.0004 1-1000 ≤ 6.3
152Eu EC 4941 ± 7 121.7817 ± 0.0003
344.2785 ± 0.0012
778.9045 ± 0.0024
964.072 ± 0.018
1085.837 ± 0.010
1112.076 ± 0.003
1408.013 ± 0.003		 0.2841 ± 0.0013
0.2658 ± 0.0012
0.1296 ± 0.0006
0.1462 ± 0.0006
0.1013 ± 0.0006
0.1340 ± 0.0006
0.2085 ± 0.0009		 1-1000
[1–100]		 ≤ 20.0
[≤ 2.0]
153Gd EC 240.4 ± 1 97.431 ± 0.021
103.18012 ± 0.00017		 0.29
0.211 ± 0.006		 1–500
[1–100]		 ≤ 1.0
[≤ 0.2]
207Bi EC 11800 ± 300 569.698 ± 0.002
1063.656 ± 0.003
1770.228 ± 0.009		 0.9776 ± 0.0003
0.7458 ± 0.0049
0.0687 ± 0.0002		 1-100
[1–50]		 ≤ 2.6
[≤ 1.3]
228Th α 670 ± 2 39.86 ÷ 2614.53 1.03 ÷ 36.06 1-100
[1–50]		 ≤ 0.3
[≤ 0.15]
241Am α 157850 ± 230 26.3446 ± 0.0002
59.5409 ± 0.0001		 0.0240 ± 0.0003
0.3578 ± 0.0009		 1-300
[1–100]		 ≤ 0.12
[≤ 0.04]
243Am α 2692000 ± 8000     1–50 ≤ 0.04
88Y +
133Ba +
152Eu +
241Am ***		 See above See above See above See above 370 +
37 +
37 +
37		 18
* Other activities are available on request. The nominal value of the radionuclide activity in the source within the specified limits is determined by the consumer when the source is ordered. Tolerance on activity ±20 % [±25 %] **
** The values for the OSGI-R sources are given in square brackets if they differ from the values for the OSGI-RT sources.
*** For multinuclide sources it is allowed to change the composition and activities of radionuclides in agreement with the customer. Multinuclide sources are supplied only on the basis of specifications for OSGI-RT sources.
Reference data Limit of error of measuring result for confidence probability р = 0.95: 7, 3 or 1,5 % — at certification, attestation in accredited metrological centers or attestation as working standards of the 0-th category (only for OSGI-RT sources), respectively.
ISO classification: С35242 [C35141]


Recommended working life and intercalibration interval of OSGI-RT sources

Radionuclide Recommended working life, years * Intercalibration interval, years *
228Th, 241Am, 243Am 5 (with activity less than 10 kBq)
3 (with activity more than 10 kBq)		 2
1
88Y, 113Sn, 139Ce 4 1
54Mn, 57Co, 65Zn, 109Cd, 153Gd 5 2
22Na, 55Fe, 134Cs 10 2
44Ti, 60Co, 137Cs, 133Ba, 152Eu, 207Bi 12 2
* Recommended working life and intercalibration interval of the multinuclide source are determined by the shortest working life and interval of individual radionuclides in the source. When supplying sources with a higher activity of the radionuclide, in agreement with the customer, a reduction of recommended working life is allowed..

Recommended working life and intercalibration interval of OSGI-R sources
Radionuclide Recommended working life, years Intercalibration interval, years
228Th. 241Am. 243Am 5 (with activity less than 10 kBq)
3 (with activity more than 10 kBq)		 2
1
54Mn, 57Co, 65Zn, 88Y, 109Cd, 113Sn, 139Ce, 153Gd 4 1
22Na, 55Fe, 134Cs 10 2
44Ti, 60Co, 133Ba, 137Cs, 152Eu, 207Bi 12 2

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