Alpha rays are easy to stop because of their size and that the very very quickly ionize other atoms.
Paper is not effective at stopping gamma rays as they are highly penetrating electromagnetic radiation. Materials such as lead or concrete are more effective at blocking gamma rays due to their higher density.
A lot of things, but I think you might be referring to which form of radiation since this is the classic answer as to what would stop Alpha radiation. Furthermore tinfoil would stop alpha and beta radiation and lead would stop alpha, beta and gamma radiation.
Alpha particles are the least penetrating, and are not able to pass through a single sheet of paper. Beta particles can penetrate through a sheet of paper, but not a piece of aluminum. Gamma rays can travel through both paper and aluminum and it takes dense material like lead to stop them or reduce their number. Gamma rays are high energy electromagnetic rays.
A few millimetres of lead.
Alpha particles, which are relatively large and positively charged, can be stopped by a few centimeters of air or a sheet of paper. Typically, a thickness of just 0.1 mm (100 micrometers) of paper is sufficient to completely halt an alpha particle. This is because alpha particles have low penetration power compared to other types of radiation, such as beta particles or gamma rays.
Gamma rays and X-rays will pass right through paper (which will stop alpha rays) and aluminum sheets (that will stop beta rays), but can be stopped by a thick layer of concrete, lead, or other substances having sufficient mass.
They stop.
The way to stop being damaged by exposure to x-rays is to reduce or eliminate your exposure to x-rays from man-made sources. There is little you can do about naturally occurring x-rays.
Delta waves, the slowest brainwave pattern, can effectively stop both alpha and gamma waves as they dominate during deep sleep and unconscious states. External factors such as strong electromagnetic fields or disruptions to the brain's natural electrical activity can also interfere with alpha and gamma wave patterns.
yes it can stop it
That depends on how one is exposed. So the is no one answer to this question. Gamma is usually more harmful as it is highly penetrating and difficult to shield against, whereas Alpha cannot penetrate a single sheet of paper. However internal Alpha radiation can be far more harmful than an equivalent Gamma dose as the radiation deposits its energy entirely in a very small space around the source. Internal radiation occurs when a source is inhaled or ingested.
Gamma radiation, X Rays