| Autor: |
Álvarez-Romero JT; SSDL, Ionizing Radiation Metrology Department, ININ Carretera Federal México Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP, Mexico., Cabrera Vertti MR; SSDL, Ionizing Radiation Metrology Department, ININ Carretera Federal México Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP, Mexico., Gutiérrez Lore S; SSDL, CPHR, Carretera La Victoria II Km 2½, e/Monumental y Final, Guanabacoa, La Habana, CP, Cuba., Tamayo JAG; SSDL, CPHR, Carretera La Victoria II Km 2½, e/Monumental y Final, Guanabacoa, La Habana, CP, Cuba., Walwyn Salas G; SSDL, CPHR, Carretera La Victoria II Km 2½, e/Monumental y Final, Guanabacoa, La Habana, CP, Cuba., de la Cruz Hernández D; SSDL, Ionizing Radiation Metrology Department, ININ Carretera Federal México Toluca S/N, La Marquesa, Ocoyoacac, Estado de México, CP, Mexico. |
| Abstrakt: |
The results of the comparison between SSDL-ININ and SSDL-CPHR (pilot laboratory) demonstrates the competence of the SSDL-ININ for the performance of the KR in 192Ir. The RININ/CHPR ratio for the calibration coefficients is 0.989 ± 0.005. The comparison uses three SI-HDR 1000-Plus as transfer chambers, series: A02423, A941755 and A973052. CPHR used a secondary standard PTW 3304 chamber, s/n 154, calibrated at PTB and ININ employed a secondary standard SI-90008 s/n A963391, calibrated at NPL. To determine KR, the SSDL-CPHR used the IAEA TEC-DOC-1274 and the SSDL-ININ used the IPEM (UK) code of practice. The latter uses a correction factor by source's geometry, ksg. The results show that both codes are equivalent; however, for the use of well chambers in the highlands or in locations with reduced atmospheric pressure, it is needed to apply an additional factor k'P, or, to design a well chamber with air-equivalent walls for the application of the conventional kPT. |
