Wanke Carsten, Kossert Karsten, Nähle Ole J, Ott Oliver
Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.
Appl Radiat Isot. 2010 Jul-Aug;68(7-8):1297-302; discussion 1302. doi: 10.1016/j.apradiso.2010.01.005. Epub 2010 Jan 13.
The activity of a solution of (64)Cu was measured by 4pibeta(PC)-gamma coincidence counting and liquid scintillation counting using the CIEMAT/NIST method. In addition, 4pi ionization chambers were used to establish and preserve calibration factors for secondary standardizations and for a determination of the half-life, for which a value of 12.704(5)h was measured. The photon emission probabilities were determined using gamma-ray spectrometry, finding values of p(511 keV)=0.3512(22) and p(1346 keV)=0.00474(5). The results were checked for consistency, and an ampoule was submitted to the BIPM to have the activity result entered into the database of the International Reference System (SIR), yielding the first entry for this radionuclide.
通过4πβ(PC)-γ符合计数和使用CIEMAT/NIST方法的液体闪烁计数来测量(64)Cu溶液的活度。此外，使用4π电离室来建立和保存用于二次标准化及半衰期测定的校准因子，测得半衰期值为12.704(5)小时。使用γ射线能谱法测定光子发射概率，得到p(511 keV)=0.3512(22)和p(1346 keV)=0.00474(5)的值。对结果进行了一致性检查，并将一个安瓿瓶提交给国际计量局，以便将活度结果录入国际参考体系（SIR）的数据库，这是该放射性核素的首个录入数据。
