Determination of the internal pair production branching ratio of 90Y

• Published in: Applied radiation and isotopes Vol. 156; p. 108943
• Main Authors: Pibida, L., Zimmerman, B.E., King, L., Fitzgerald, R., Bergeron, D.E., Napoli, E., Cessna, J.T.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2020
• Subjects: High purity germanium detector; Internal pair production; Quantitative PET imaging; Y-90; Y-90; High purity germanium detector; Quantitative PET imaging; Internal pair production
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2019.108943

The National Institute of Standards and Technology (NIST) measured the internal pair production branching ratio of 90Y using two sources and four high purity germanium (HPGe) detectors to detect the resulting annihilation radiation. The internal pair production branching ratio determined from these measurements, (32.0 ± 1.5) × 10−6 (k = 1), agrees within 1 standard uncertainty with the recommended value of (32.6 ± 0.7) × 10−6 (k = 1) from the DDEP database. •Measured internal pair production branching ratio of Y-90.•Used high-purity germanium detectors for gamma-ray spectrometry.•Result in good agreement with literature.