Americium-241 Alpha Decay

241Am → 237Np + 4He

概要

Americium-241 alpha decays to neptunium-237 with a half-life of 432 years, also emitting a 59.5 keV gamma ray. Am-241 is the most common household radioactive source, present in virtually every smoke detector. A tiny amount (about 1 microgram) ionizes air between two plates.

参加者

役割 物質 係数 状態
反応物 Americium Am 1 (s)
生成物 Neptunium Np 1 (s)
生成物 Helium He 1 (g)

日常の例

The smoke detector in your home contains Am-241 that ionizes air. When smoke particles disrupt this ionization, the alarm sounds.

産業上の重要性

Am-241は電離式煙感知器、工業用厚さ計、建設における水分密度計に使用されています。

特性

タイプ
Nuclear
可逆的
いいえ
エネルギー
発熱性
ΔH
-535000000.0 kJ/mol

関連する反応

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 Beta Decay of Cobalt-60 Plutonium-239 Fission Electron Capture by Beryllium-7

Frequently Asked Questions

What is the equation for Americium-241 Alpha Decay?
The balanced equation is: ²⁴¹Am → ²³⁷Np + ⁴He.
What type of reaction is Americium-241 Alpha Decay?
Americium-241 Alpha Decay is a nuclear reaction.
Is Americium-241 Alpha Decay exothermic or endothermic?
Americium-241 Alpha Decay is exothermic (releases energy). The enthalpy change (ΔH) is -535000000.0 kJ/mol.