Technetium-99m Gamma Decay

^99mTc → ⁹⁹Tc + γ

Overview

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.

Participants

Role	Substance	Coefficient	State
Reactant	Technetium Tc	1	(s)

Everyday Example

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

Industrial Importance

Tc-99m accounts for over 80% of all nuclear medicine procedures globally, used for bone, heart, brain, lung, and kidney imaging.

Properties

Type: Nuclear
Reversible: No
Energy: Exothermic
ΔH: -14000000.0 kJ/mol

Related Reactions

Alpha Decay of Polonium-210 Alpha Decay of Radium-226 Alpha Decay of Radon-222 Alpha Decay of Thorium-232 Alpha Decay of Uranium-238 Americium-241 Alpha Decay Beta Decay of Carbon-14 Beta Decay of Cesium-137 Beta Decay of Cobalt-60 Beta Decay of Iodine-131

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.