Table of Contents
When was the term radioactivity first used?
In 1898 French physicists Pierre and Marie Curie discovered the strongly radioactive elements polonium and radium, which occur naturally in uranium minerals. Marie coined the term radioactivity for the spontaneous emission of ionizing, penetrating rays by certain atoms.
How did Marie Curie discover radioactivity?
On April 20, 1902, Marie and Pierre Curie successfully isolate radioactive radium salts from the mineral pitchblende in their laboratory in Paris. In 1898, the Curies discovered the existence of the elements radium and polonium in their research of pitchblende.
Who invented gamma rays?
Gamma radiation is one of the three types of natural radioactivity discovered by Becquerel in 1896. Gamma rays were first observed in 1900 by the French chemist Paul Villard when he was investigating radiation from radium . They are emitted by a nucleus in an excited state.
Who was the first person to discover radiation therapy?
In 1901 Roentgen received the first Nobel Prize awarded in physics. Radiation therapy began with radium and with relatively low-voltage diagnostic machines. In France, a major breakthrough took place when it was discovered that daily doses of radiation over several weeks greatly improved the patient’s chance for a cure.
When did the modern understanding of radiation begin?
The modern understanding of ionizing radiation got its start in 1895 with Wilhelm Röntgen.
When was the first report of radiation injury?
Soon afterward, the penetrating properties of the rays began to be exploited for medical purposes, with no inkling that such radiation might have deleterious effects. The first reports of X-ray injury to human tissue came later in 1896.
When was the discovery of X-rays and radiation?
Within weeks after Röntgen revealed the first X-ray photographs in January 1896, news of the discovery spread throughout the world. Soon afterward, the penetrating properties of the rays began to be exploited for medical purposes, with no inkling that such radiation might have deleterious effects.