Ireneusz Jan Natkaniec was Polish physicist. Achievements include research in phase transitions and dynamical properties of condensed matter. Recipient Rentgen medal, European Academy Natural Sciences, Hanover. Member of Polish Neutron Scattering Society (associate), Neutron Scatering Society of America (associate), European Physical Society (associate).
- Researcher H. Niewodniczanski Institute Nuclear Physics, Krakow, since 1962. Leading scientist Frank Laboratory of Neutron Physics, Dubna, Russia, since 1979, deputy director, 1987—1993.