Volume 1 of Radiation Physics provides a detailed and comprehensive foundation in the principles of physics, radiation science, radiation safety, and radiobiology, making it an essential resource for students, researchers, and professionals in medical physics, radiology, radiation therapy, and nuclear science. The book begins with an overview of fundamental physics concepts, including classical mechanics, electromagnetism, quantum mechanics, and atomic structure, which are crucial for understanding the behavior of radiation. It explores the nature of ionizing and non-ionizing radiation, their sources, properties, and interactions with matter, covering topics such as radioactive decay, half-life, X-ray and gamma-ray production, and neutron interactions. A significant portion of the volume is dedicated to radiation safety and protection, detailing the principles of radiation shielding, exposure minimization (time, distance, and shielding), dose measurement, and monitoring using advanced dosimetry techniques.

It also highlights the international safety regulations established by organizations such as the International Commission on Radiological Protection (ICRP) and the International Atomic Energy Agency (IAEA) to ensure the responsible and safe use of radiation in medical, industrial, and research settings. The book further delves into radiobiology, explaining how radiation affects biological tissues at the molecular and cellular levels, including DNA damage, mutation mechanisms, radiation-induced cell death, and repair processes. The effects of radiation exposure are categorized into deterministic and stochastic effects, helping readers understand both the short-term and long-term risks associated with radiation. Special attention is given to the medical applications of radiation, particularly in diagnostic imaging, cancer treatment (radiation therapy), and nuclear medicine, where radiation is used for both therapeutic and diagnostic purposes. The volume also explores the technological advancements in radiation detection, imaging techniques, and radiation therapy equipment, ensuring that readers gain insights into modern innovations in the field. By providing a thorough and structured exploration of radiation physics principles, safety measures, biological impacts, and practical applications, this volume serves as a foundational guide for professionals, educators, and students, enabling them to apply radiation science safely and effectively in healthcare, research, and industry.