Collins Sean, Keightley John, Gilligan Chris, Gasparro Joel, Pearce Andy
National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, United Kingdom.
National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, United Kingdom.
Appl Radiat Isot. 2014 May;87:107-11. doi: 10.1016/j.apradiso.2013.11.007. Epub 2013 Nov 12.
A radioactive solution of (111)Ag, standardised by the absolute measurement methods 4π(PC)-γ and 4π(LS)-γ coincidence counting at the National Physical Laboratory (NPL), was measured by two independently calibrated HPGe γ spectrometers in order to estimate the γ emission intensities and to determine the absolute intensity, with the aim of improving the currently published values. An absolute intensity value of 6.68 (7)% was obtained for the 342.1 keV γ emission, which is in agreement with previously reported values, but greatly reduces the uncertainty. Additionally, this work proposes a new emission intensity for the 450.0 keV γ emission that has not been previously reported, with an absolute intensity of 0.000482 (12)%. An investigation of the published γ emission intensities shows significant discrepancies that require resolution.
一种通过英国国家物理实验室（NPL）的绝对测量方法4π（PC）-γ和4π（LS）-γ符合计数进行标准化的（111）银放射性溶液，由两台独立校准的高纯锗γ光谱仪进行测量，以估计γ发射强度并确定绝对强度，目的是改进当前公布的值。对于342.1 keV的γ发射，获得的绝对强度值为6.68（7）%，这与先前报道的值一致，但大大降低了不确定性。此外，这项工作提出了一个此前未报道过的450.0 keV γ发射的新发射强度，绝对强度为0.000482（12）%。对已发表的γ发射强度的调查显示存在需要解决的显著差异。
