Nuclear reactions in the continuous energy region." Offprint from Nature, Vol. 144, pp. [200-201], July 29, 1939

1939. FIRST EDITION. In perfect condition. FUNDAMENTAL WORK ON NUCLEAR ENERGY

BOHR, N[iels], PEIERLS, R[onald] & PLACZEK, G[eorge]
"Nuclear reactions in the continuous energy region." Offprint from Nature, Vol. 144, pp. [200-201], July 29, 1939. 8vo. In perfect condition.
First edition, first printing, the rare author's offprint issue. This is the sequel to Bohr & Kalckar's earlier work "On the transmutation of atomic nuclei by impact of material particles" which had introduced the "liquid-drop model" of the nucleus, a description (truncated) of atomic nuclei in which the nucleons (neutrons and protons) behave like the molecules in a drop of liquid. If given sufficient extra energy (as by the absorption of a neutron), the spherical nucleus may be distorted into a dumbbell shape and then split at the neck into two nearly equal fragments, releasing energy. $ 1650.00. (Inventory #: 19343)