Technetium-99m Gamma Decay

99mTc → 99Tc + γ

概述

Technetium-99m (metastable) releases a 140 keV gamma ray to reach the ground state Tc-99 with a half-life of 6.01 hours. This isomeric transition emits no particulate radiation. The 140 keV gamma energy is ideal for gamma camera detection, and the 6-hour half-life allows sufficient imaging time with rapid decay.

参与者

角色 物质 系数 状态
反应物 Technetium Tc 1 (s)

日常示例

Tc-99m is used in about 30 million medical diagnostic scans worldwide each year, making it the most widely used medical radioisotope.

工业重要性

Tc-99m约占所有核医学检查的80%以上，广泛用于骨骼扫描、心脏灌注和肿瘤检测，是核医学影像的支柱核素。

属性

类型
Nuclear
可逆
否
能量
放热
ΔH
-14000000.0 kJ/mol

相关反应

Alpha Decay of Radium-226 Alpha Decay of Radon-222 Alpha Decay of Thorium-232 Neutron Capture by Uranium-238 Beta Decay of Iodine-131 Beta Decay of Strontium-90 Alpha Decay of Polonium-210 Americium-241 Alpha Decay Beta Decay of Cobalt-60 Electron Capture by Beryllium-7

Frequently Asked Questions

What is the equation for Technetium-99m Gamma Decay?
The balanced equation is: ⁹⁹ᵐTc → ⁹⁹Tc + γ.
What type of reaction is Technetium-99m Gamma Decay?
Technetium-99m Gamma Decay is a nuclear reaction.
Is Technetium-99m Gamma Decay exothermic or endothermic?
Technetium-99m Gamma Decay is exothermic (releases energy). The enthalpy change (ΔH) is -14000000.0 kJ/mol.