Radiation Report

8/3/2019 Radiation Report

1/23


2/23


3/23

What is Radiation? the emission or diffusion of rays of light or heat.

forms of energy which move across space from sources

outside ourselves.

process in which energetic particles or energy or waves travels

through a medium or space.

is a electromagnetic wave that has no charge and no mass.


4/23

DISCOVERY

OFRADIATION


5/23

Wilhelm Conrad Rontgen

discovered and named x-ray

- discovered the main properties of x-rays.


6/23

Wilhelm Conrad

Roentgen ->


7/23

HENRI BECQUEREL,MARIE CURIE AND

PIERRE CURIE

- discovered that only certain elements gave of thisrays of energy.they named this behavior radioactivity.


8/23


9/23


10/23

ERNEST RUTHERFORD

- determined that the rays produced by the source struck

three distinct areas on a screen of reactive material: one

corresponds to a positive charge: alpha, one being

negative beta and one is neutral gamma.


11/23

Ernest Rutherford ->


12/23

TWOTYPESOF

RADIATION


13/23

IONIZINGRADIATION- is a radiation with sufficiently high energy that can

ionize atoms.

Alpha Beta

Neutron

X-ray

Gamma


14/23

Non Ionizing Radiation

- refers to any type of electromagnetic radiation that does not carryenough energy per quantum to ionize atoms or molecules. That is,

to completely remove an electron from an atom or molecule.

Neutron Radiation

Electromagnetic Radiation Visible Light

Infrared

Microwave

Radio waves

Very low Frequency

Extremely low Frequency Black body Radiation

Thermal Radiation


15/23

Uses of

Radiation


16/23

In Medicine

Diagnosis

treatment research


17/23


18/23


19/23

In Science

Researchers use radioactive atoms to determine the age of

materials that were once part of a living organism. The age

of such materials can be estimated by measuring theamount of radioactive carbon they contain in a process

called radiocarbon dating. Environmental scientists use

radioactive atoms known as tracer atoms to identify the

pathways taken by pollutants through the environment.


20/23

Cancercaused by a very small amount of ionizing radiation. Leukemia and thyroid cancer caused by ionizing radiation .(x-rays, radon gas, radioactive material)

ALSO . . .

radiosensitive cells are blood forming cells (bone

marrow), intestinal lining, hair follicles and fetuses.Hence, these develop cancer first.


21/23

RADIATION

ACCIDENTSAND

CASUALTIES


22/23

Between 1944 and 1999 there were 400

radiation accidents leading to about 3,000 persons overexposed with 130 fatalities. The fatalities includes 28

firefighters who suffered acute radiation disease due to

the Chernobyl accident in April 1986 and 17 cancer

patients who received an overdose up to 60% in a

radiotherapy department in a Costa Rican hospital in

August 1996 due to calibration mistake causing their

death within three years..


23/23

Radiation Report

Documents