She compared their evolutionary radiations – or how species adapt to and fill ecological niches – to famous examples like Darwin's finches in the Galapagos or the cichlids of East Africa's lakes.
Properties of the original uncharged radiations can then be inferred by studying the charged particles that are produced.
Pierre then studied these radiations by calorimetry and also observed the physiological effects of radium, thus opening the way to radium therapy.
Radionuclides emit various ionizing radiations (e.g., electrons, positrons, alpha particles, gamma rays, or even characteristic X rays), the precise types of which depend on the radionuclide in question.
Unlike X rays and gamma rays, some high-energy radiations travel at less than the speed of light.
The average dE/dx value for charged particles is relatively large because of their short range, and they are often referred to as high dE/dx radiations.
For both matter and radiations, light in particular, it is necessary to introduce the corpuscle concept and the wave concept at the same time.
In radiotherapy, use is made of the biological effects of ionizing radiations.
Since the early days physicians practicing treatment with ionizing radiations have worked in close collaboration with physicists, and much of the fundamental research has been undertaken by radiation physicists working alongside their medical colleagues.
Therefore, the products of these reactions are ionizing particles, and they interact in much the same way as direct radiations consisting of heavy charged particles.
Adaptive radiations are best exemplified in closely related groups that have evolved in a relatively short time.
