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烟雾报警器有放射性吗

目前市场上的烟雾报警器主要有2种,一种是离子烟雾报警器,一种是光电烟雾报警器。其中离子烟雾报警器是由两个内含Am(镅)241放射源的串联室、场效应管及开关电路组成的。内电离室即补偿室,是密封的,烟不易进入;外电离室即检测室,是开孔的,烟能够顺利进入。在串联两个电离室的两端直接接入24V直流电源。当火灾发生时,烟雾进入检测电离室,Am(镅)241产生的α射线被阻挡,使其电离能力降低,因而电离电流减少,检测电离室空气的等效阻抗增加,而补偿电离室因无烟进入,电离室的阻抗保持不变,因此,引起施加在两个电离室两端分压比的变化,在检测电离室两端的电压增加量达到一定值时,开关电路动作、发出报警信号。离子烟雾报警器中的Am(镅)241既然是一种放射性同位素,那么他肯定是有辐射的。但是对于用户来说,因为此类产品中Am(镅)241经过阿尔法衰变后,由轫致辐射所产生的伽马射线能量也非常低,是一种软伽马射线,穿透能力极弱;而且其活度非常低,产生伽马射线的剂量也很低,所以对人体几乎没有什么影响,属于放射性豁免的范围。但如果是离子烟雾报警器生产企业,就不属于豁免范围了。https://zhidao.baidu.com/question/1928924560346226747.html
Radioactive Smoke Detectors Can Be More Dangerous Than Fire
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There are no trustworthy sources for determining how severe the risk of americium exposure is, because all of the research has been done by the same nuclear industry that has sought innovative ways to dispose of its nuclear waste products, such as americium.

The defenders of americium's use often state that the amount of radiation released is little different from that of the background radiation within a busy city. These proponents of child radiation exposure intentionally fail to mention the differences between electromagnetic radiation and nuclear radiation, for nuclear radiation (such as that which is produced by americium) is exceedingly more dangerous. Nevertheless, both types of radiation cause a variety of health issues, including cancers; especially the gamma radiation from nuclear waste. Despite the alleged "harmless" nature of the radioactive smoke detectors, customers are urged not to dispose of them as household garbage. Instead, American citizens are asked to return their old smoke detectors to manufacturers or to the Nuclear Regulatory Commission (NRC). Furthermore, according to F.E.M.A., the radioactive smoke detectors are an occupational hazard inside warehouses which store them. How is that for doublespeak? It's like they are saying that we should put the radioactive product inside our houses, but not into the community dump, since their families might get environmentally exposed too.

If americium radiation exposure were indeed safer than our background radiation exposure, then it would mean that this unnatural substance emits a safe and health-generating form of radiation, which somehow protects us from the less wonderful radiation. These "facts" are part of the nuclear-industry's "sciencehttp://www.huarenv5.com/forum/vi ... d=314928&extra=
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