Daniel Zajfman (Hebrew: דניאל זייפמן; born June 7, 1959) is an Israeli physicist whose main research interests are centered on the physics of simple molecular ions.

He joined the Hashomer Hatzair movement while studying at the Athénée Robert Catteau.

[3] for his contributions to the advancement of science and German-Israeli cooperation His research focuses on the reaction dynamics of small molecules and how they influence the composition of the interstellar medium.

He recreates the conditions of outer space in the laboratory using special devices called 'ion traps' or 'storage rings'.

Some of his research has focused on the puzzle of how complex molecules are formed in outer space.