Technetium-99 (99 Tc) is an isotope of technetium that decays with a half-life of 211,000 years to stable ruthenium-99, emitting beta particles, but no gamma rays. It is the most significant long …

2025年2月6日 · Technetium-99 (chemical symbol Tc-99) is a silver-gray, radioactive metal. It occurs naturally in very small amounts in the earth's crust, but is primarily man-made. …

锝-99，核素符号99Tc，半衰期为2.111E+05a，是一个产额高、寿命长的裂变产物，在生态系统中有较大的迁移性。可作为超导材料和抗腐剂，用于航天航海和科学研究，制作稳定的β标准源 …

Technetium-99m (99m Tc) is a metastable nuclear isomer of technetium-99 (itself an isotope of technetium), symbolized as 99m Tc, that is used in tens of millions of medical diagnostic …

2021年6月7日 · Tc-99m是理想的医学示踪核素，在核医学诊断中应用很广泛，占全世界医疗用放射性元素的80%，其中90%用于扫描诊断。 Tc99m诊断体内出血部位：注射同位素后，用单 …

Technetium-99 (99 Tc) is a major product of the fission of uranium-235 (235 U), making it the most common and most readily available isotope of technetium. One gram of technetium-99 …

The decay product of Mo-99, Tc-99m, is the workhorse isotope in nuclear medicine for diagnostic imaging. Tc-99m is used for the detection of disease and for the study of organ structure and …

Technetium-99 (Tc-99) is a radioactive metal. Most technetium-99 is produced artificially, but some also occurs naturally in very small amounts in the earth’s crust. Technetium-99 was first …

2023年11月23日 · 锝，元素符号Tc，为银白色金属，原子序数为43，是首个以人工方法制得的元素。 锝总共有21种同位素，锝-99为最常见的同位素之一，而锝-99m，是锝-99激发态的同质 …

锝-99（Technetium-99）是一种放射性同位素，它的性质、用途、制法和安全信息如下： 性质： 它的原子核不稳定，会通过放射性衰变转变成锝-99m或其他同位素。