ANIMMA 2021 is the seventh of a series of conferences devoted to endorsing and promoting scientific and technical activities based on nuclear instrumentation and measurements. The main objective of the conference is to unite the various scientific communities not only involved in nuclear instrumentation and measurements, but also in their wide fields of applications such as fundamental physics, space technologies, nuclear medicine, medical and environmental sciences. The conference is all about getting scientists, engineers, students, and the industry to meet, exchange cultures and identify new scientific and technical prospects to help overcome both current and future unresolved issues.