The measurement unit used to quantify radiation exposure is the sievert (Sv) or its subunits, such as millisieverts (mSv) or microsieverts (µSv). The severity of radiation effects and the time it takes for them to become fatal vary significantly. Acute radiation exposure refers to a high dose of radiation received over a short period, while chronic exposure refers to a lower dose of radiation received over an extended period.
In cases of extremely high radiation exposure, where the dose is in the range of several gray (Gy) or higher, the onset of symptoms can occur within hours to days. This is known as acute radiation syndrome (ARS) and can cause symptoms such as nausea, vomiting, diarrhea, fatigue, hair loss, and damage to the bone marrow, gastrointestinal system, and central nervous system. Without prompt medical treatment, a person with severe ARS may die within days or weeks.
In cases of lower radiation exposure, the effects may not be immediately noticeable, and the risks are more related to long-term health effects, such as an increased risk of cancer. The time it takes for cancer or other radiation-related illnesses to develop can vary widely, ranging from months to years or even decades, depending on factors like the dose, the type of radiation, and individual susceptibility.
It's important to note that radiation exposure limits are set by regulatory bodies, and adherence to safety protocols and guidelines helps minimize the risks associated with radiation exposure. If you suspect you have been exposed to high levels of radiation, it is crucial to seek immediate medical attention and follow the advice of healthcare professionals.
For accurate and detailed information regarding radiation exposure and its effects on health, it is always best to consult with a medical professional or relevant authorities who specialize in radiation safety.