Krane K S
Department of Physics, Oregon State University, Corvallis, OR, 97331, USA.
Appl Radiat Isot. 2020 Sep;163:109191. doi: 10.1016/j.apradiso.2020.109191. Epub 2020 May 13.
The activity Y was produced by radiative neutron capture on targets of mono-isotopic Y at several different reactor sites. By observing the γ rays emitted in the decay of Y, the thermal neutron cross section was deduced to be 1.02(1) mb, and the resonance integral was deduced to be 7.82(19) mb or 7.35(15) mb at 2 different reactor sites. The energies of the 3 γ rays emitted in the Y decay were measured to be 202.539(10), 479.532(10), and 682.03(4) keV by comparison with the energies of lines in well-known calibration sources. The half-life of the Y decay was determined to be 3.178(12) h. The cross sections are discussed in the context of a statistical model of radiative capture.
放射性活度Y是通过在几个不同的反应堆场址对单同位素Y靶进行辐射中子俘获产生的。通过观察Y衰变过程中发射的γ射线，推导出热中子截面为1.02(1)毫靶，在两个不同的反应堆场址推导出共振积分分别为7.82(19)毫靶或7.35(15)毫靶。通过与知名校准源中谱线的能量进行比较，测得Y衰变过程中发射的3条γ射线的能量分别为202.539(10)、479.532(10)和682.03(4)千电子伏。确定Y衰变的半衰期为3.178(12)小时。在辐射俘获统计模型的背景下讨论了截面。
