Alexander Mikhailovich Baldin (born 26.02.1926) — is a Soviet physicist and an academician of the USSR Academy of Sciences (1981; a corresponding member from 1972). He was born in Moscow. He graduated from the Moscow Engineering Physics Institute (1949). In 1949 — 68 he worked at the Physical Institute of the USSR Academy of Sciences (from 1960 — as head of a section), and from 1961 — also at the Joint Institute for Nuclear Research in Dubna (from 1968 — as director of the Laboratory of High Energies). His research is in the field of elementary-particle physics, electromagnetic interactions, nuclear physics and the theory of accelerators.
Together with V. V. Mikhailov he was the first to construct (1950 — 52), in the pole approximation, the theory of the photoproduction of mesons (introducing the anomalous magnetic moments of the nucleons), and he predicted (1951) the main regularities of near-threshold meson photoproduction, which were later confirmed experimentally (the USSR State Prize, 1973). He proved (1957), taking the proton as his example, that elementary particles must possess electric and magnetic polarisability. He discovered the direct transition from a photon to a vector meson, taking as his example the decays of vector mesons into electron-positron pairs (1967). He introduced the concept of the optical anisotropy of nuclei (1959) and developed the theory of the tensor polarisability of nuclei (1960). He was a co-author of the design of the Dubna synchrophasotron (1949). He proposed (with M. S. Rabinovich and V. V. Mikhailov) the method of envelopes (1950) and the theory of almost periodic motion in arbitrary magnetic fields (1952).
He predicted and, together with V. S. Stavinsky, detected the cumulative effect in collisions of relativistic nuclei (1971). He laid the foundations of relativistic nuclear physics.
Together with V. V. Mikhailov he was the first to construct (1950 — 52), in the pole approximation, the theory of the photoproduction of mesons (introducing the anomalous magnetic moments of the nucleons), and he predicted (1951) the main regularities of near-threshold meson photoproduction, which were later confirmed experimentally (the USSR State Prize, 1973). He proved (1957), taking the proton as his example, that elementary particles must possess electric and magnetic polarisability. He discovered the direct transition from a photon to a vector meson, taking as his example the decays of vector mesons into electron-positron pairs (1967). He introduced the concept of the optical anisotropy of nuclei (1959) and developed the theory of the tensor polarisability of nuclei (1960). He was a co-author of the design of the Dubna synchrophasotron (1949). He proposed (with M. S. Rabinovich and V. V. Mikhailov) the method of envelopes (1950) and the theory of almost periodic motion in arbitrary magnetic fields (1952).
He predicted and, together with V. S. Stavinsky, detected the cumulative effect in collisions of relativistic nuclei (1971). He laid the foundations of relativistic nuclear physics.