CCRI(III)-K9.AmBe, CCRI(III)-K9.AmBe.2 and CCRI(III)-K9.AmBe.1
MEASURAND Neutron source emission rate
SOURCE 241Am-Be(α,n)
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in s-1.
CCRI(III)-K9.AmBe, CCRI(III)-K9.AmBe.2 and CCRI(III)-K9.AmBe.1
MEASURAND Neutron source emission rate
SOURCE 241Am-Be(α,n)
Degrees of equivalence represented by Di = (xI - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in s-1.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
s-1 |
s-1 |
s-1 |
||
| CIAE | -6.47E+04 | 3.34E+04 | ||
| CMI | -1.27E+04 | 3.68E+04 | ||
| KRISS | -2.71E+03 | 2.65E+04 | ||
| LNE-LNHB | -1.46E+05 | 6.52E+04 | ||
| LNMRI | -4.71E+03 | 2.50E+04 | ||
| NIST | -3.57E+04 | 5.25E+04 | ||
| NPL | -1.27E+04 | 2.72E+04 | ||
| VNIIM | 2.53E+04 | 2.04E+04 | ||
| ENEA-INMRI | 3.41E+05 | 8.00E+04 | ||
| LNE-LNHB | -7.19E+04 | 7.06E+04 | ||
| NIM | -6.12E+03 | 5.87E+04 |
| Metrology area, Sub-field | Ionizing Radiation, Section III (Neutron Measurements) |
| Description | Fluence for 241AmBe |
| Time of measurements | 2025 |
| Status | Protocol complete |
| References | |
| Measurand | Fluence |
| Transfer device | Berthold LB6411 |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | EURAMET (European Association of National Metrology Institutes) |
| Pilot institute |
STUK
Radiation and Nuclear Safety Authority Finland |
| Contact person | Reetta Nylund +358401520941 |
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CCRI(III)-K9.AmBe, CCRI(III)-K9.AmBe.2 and CCRI(III)-K9.AmBe.1
MEASURAND Neutron source emission rate
SOURCE 241Am-Be(α,n)
CCRI(III)-K9.AmBe
The key comparison reference value xR and its standard uncertainty uR have been calculated from the participants' results, excluding CIAE and LNE-LNHB data (see details in Section 5.1.1 and Appendix A of the Final Report).
xR = 2.445 x 106 s-1
uR = 0.006 x 106 s-1
The degree of equivalence of laboratory i with respect to xR is given by a pair of terms: Di and Ui its expanded uncertainty (k = 2), both expressed in s-1.
Linking CCRI(III)-K9.AmBe.2 to CCRI(III)-K9.AmBe
The results obtained in CCRI(III)-K9.AmBe.2 were linked to CCRI(III)-K9.AmBe via NPL (United Kingdom) who participated in both comparisons.
Linking CCRI(III)-K9.AmBe.2 to CCRI(III)-K9.AmBe
The results obtained in CCRI(III)-K9.AmBe.1 were linked to CCRI(III)-K9.AmBe via NPL (United Kingdom) who participated in both comparisons.
CCRI(III)-K9.AmBe, CCRI(III)-K9.AmBe.2 and CCRI(III)-K9.AmBe.1
MEASURAND Neutron source emission rate
SOURCE 241Am-Be(α,n)
xi emission rate submitted by each institute i at the reference date of 1 January 2000
ui combined standard uncertainty of xi
CCRI(III)-K9.AmBe
-K9.AmBe LIM.png)
(a) The NPL value is an average of the measurements made in 1999 and 2004.
(b) The VNIIM value is an average of results obtained for the manganese bath and associated particle measurements.
CCRI(III)-K9.AmBe.2
-K9.AmBe.2 LIM.png)
CCRI(III)-K9.AmBe.1
-K9.AmBe.1 LIM.png)
