Data from planar measurements of 131I point sources using one detector head without collimation. (A) Total spectrum count rate (Open_HE) and scatter-corrected count rate in the 364.5 keV energy window (EM-SC). (B) Count rates per activity unit after correcting for dead-time count losses. ...
ProcessingofiodineinathyroidfollicularcellsNIS:sodium–iodinesymporter钠/碘共转运子131IodinePhysicalhalf-lifeof8.1dAprincipalγ-rayof364KeV;Aprincipalβ-particlewithamaximumenergyof0.61MeV,anaverageenergyof0.192MeVTissuepenetrationofelectrons/alphas/betas交叉火力效应 Cross-fireeffect是指释放出来的射线在射程范围内...
Furthermore, the highest photon energy of the beamline has been extended from 10 keV to 13 keV, enabling several heavy elements such as lead to be studied while the lowest photon energy currently covers the sodium K-edge. To demonstrate improved XAFS performance, XAFS experiments were carried ...
根据中华医学会核医学分会 2018 年开展的全国 131I 是核医学中最常用的放射性核素,是治疗甲状腺 核医学普查工作显示[7],截至 2017 年 12 月 31 日,我国 功能紊乱,甲状腺癌以及其他甲状腺疾病的常用核 从事核医学专业相关的科室共 927 个,开展核素治疗的 素[2],它能产生能量为 364keV 的γ 射线以及最大能...
The long known γ-ray of 177 keV which does not fit into the decay scheme was found to be in coincidence with a new ray of 326 ± 10 keV. The intensity of this new γ-cascade is ≈ 0.2% in relation to the γ-ray of 364 keV. From the level of 500 ± 10 keV energy ...
The region below 364 keV energy of gamma radiation deriving from the decay of I 131 was examined by scintillation techniques with ordinary as well as with sum-coincidence methods. A new cascade of 156–210 keV (of an intensity of ≈1 % in relation to the cross-over transition) from a ...
在本发明的一个方面中,用于生产放射性同位素的方法包括:将neu材料引入到辐照室中;用能量高于800kev的中子辐照所述neu材料,以在所述neu材料中引起快中子裂变反应发生,并生成裂变产物;以及从所述neu材料提取所述裂变产物。所述辐照室具有一个或多个由中子反射材料形成的壁,并且来自所述辐照的至少一些中子被所述一个...
The activity of administered 131I was less than 1.52 MBq because the mouse vomited some of it, and the loss could not be measured. Point‑source measurement The point sources of 133Ba and 22Na were measured to evaluate the FWHM of the ARM at 356 keV and 511 keV. ARM is ...
131 I治疗后对周围环境的辐射剂量率,采用 单指数曲线拟合方法处理测量数据,计算出分化型甲状腺癌患者的 131 I平均有效半衰期为(14.6±6.5)h, 该结果与国外文献报道均值接近,说明 131 I有效半衰期不存在人种差异性。对患者有效半衰期进行的统计 学检验表明,患者有效半衰期与服药次数和年龄有负相关关系,与患者性别和服药...
The concentrations of 131I, 134Cs, and 137Cs were measured using a high-purity germanium (HpGe) semiconductor detector with a multichannel analyzer (Seiko EG & G; ORTEC, Oak Ridge, TN, USA). This HpGe semiconductor detector has a resolution of 1.44 keV at a peak of 662.15 keV (137Cs)...