462 c35 376 63a e6b ddb 28f 577 ee5 341 406 eb1 8b9 ff0 943 7c5 22d 48c 553 272 c75 25e 9f8 799 9c5 ddc 2d9 fc2 48c cf8 1e5 87b eae 4a0 07d c2b 5aa 644 38a a1d ded 4fe 8e4 87d a76 d3a f69 e52 880 def c19 f2c b33 1cc 802 cc6 d9c 91b 719 a76 9e4 74b c31 e05 5fe 424 492 d16 f7c 71f 449 d1b d2a 44e 944 192 153 c9c 21c cf1 088 91b ed1 b5c 349 c74 097 2e2 97e 09d 4ed 16d 50c c98 b5c e65 7b3 57e f09 8cc
Ionization smoke detectors use americium as a source of alpha particles. Alpha particles from the americium source ionize air molecules. This makes some particles positively charged and some negatively charged.Ionization smoke detectors use americium as a source of alpha particles. Alpha particles from the americium source ionize air molecules. This makes some particles positively charged and some negatively charged.09-Aug-2021
How is radiation used in smoke detectors?
An isotope of americium which emits alpha particles is used in smoke alarms. Alpha radiation ionises the air and this allows a small current to flow between two electrodes. Alpha is weakly penetrating so smoke stops it, the current drops and the alarm goes off.
Why is beta and gamma radiation not used in smoke detectors?
(c) The smoke alarm would not work with a radiation source that emits beta or gamma radiation. Explain why. Most of the beta and gamma radiation would penetrate smoke and no change in the count rate would be detected.
Are gamma rays radioactive?
The penetrating power of gamma rays has many applications. However, while gamma rays penetrate many materials, this does not make them radioactive. The three radionuclides that are by far the most useful are cobalt-60, caesium-137, technetium-99m and americium-241.
What type of radiation is used in radiotherapy?
Radiation therapy uses high-energy particles or waves, such as x-rays, gamma rays, electron beams, or protons, to destroy or damage cancer cells. Your cells normally grow and divide to form new cells. But cancer cells grow and divide faster than most normal cells.
How do smoke detectors use gamma rays?
0:004:21How Radiation Works using Americium 241, Alpha ParticlesYouTube
What is beta radiation used for?
Beta radiation is used for tracers and monitoring the thickness of materials. Doctors may use radioactive chemicals called tracers for medical imaging. Certain chemicals concentrate in different damaged or diseased parts of the body, and the radiation concentrates with it.
What are the 7 types of radiation?
The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays and gamma-rays.
What types of radiation are there?
There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and how deeply they penetrate people and objects. The first is an alpha particle.
What are the 4 types of radiation?
There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and how deeply they penetrate people and objects. The first is an alpha particle.
