Israel Dostrovsky

Israel Dostrovsky was born in Odessa in 1918. About a year later, he immigrated with his parents to the Land of Israel.[1] He grew up in Jerusalem, where he attended primary and secondary school.[5]

Dostrovsky traveled to England for his higher education, earning a bachelor's degree in chemistry and a doctorate in physical chemistry from University College London.[4][5] He completed his doctorate in 1943 and then taught and conducted research in the United Kingdom for five years, becoming an authority on isotope research.[4] This expertise would shape much of his subsequent scientific career and his contributions to the Weizmann Institute and Israel's national programs in nuclear science and energy.

Dostrovsky returned in 1948 and joined the Weizmann Institute of Science in Rehovot shortly before its formal dedication.[1][5] He became head of its Isotope Research Department and remained in that position until 1965, a tenure of approximately seventeen years.[1] During this period, he designed and constructed an isotope-separation plant and initiated experimental nuclear-chemistry research at the institute.[1][3]

His research encompassed the mechanisms of chemical reactions, isotope effects, and high-energy nuclear reactions, including fission, spallation, nuclear evaporation, fragmentation, and nuclear transfer.[1] He also developed techniques for separating hydrogen and oxygen isotopes, and the Weizmann Institute became an important supplier of oxygen isotopes used in studies of organic processes.[3] One of his most consequential practical discoveries was a chemical process for producing heavy water.[6] The process offered an alternative to the lengthy and expensive electrical method then in use and strengthened relations between Israel and France.[6]

From 1961 to 1964, Dostrovsky served as a senior scientist at Brookhaven National Laboratory in the United States.[1] He subsequently became director-general of the Israel Atomic Energy Commission. The Encyclopaedia Judaica dates his tenure to 1965–1971, while another biographical note gives 1966 as the appointment year.[1][4] The latter source describes him in that capacity as head of Israel's nuclear project.[4]

Dostrovsky also represented Israel in international scientific and energy organizations. From 1973 to 1981, he served on the scientific advisory committee of the International Atomic Energy Agency in Vienna.[5] He represented Israel in the International Energy Agency and chaired the National Council for Research and Development and a national desalination committee.[1][5]

At the Weizmann Institute, Dostrovsky was appointed vice president in 1971, acting president and chief executive officer in 1972, and president in November 1973.[1] His presidency ended in 1975, when the institute named him an "institute professor," a title awarded to scientists who had made exceptional contributions to science or the country.[5] Ynet described him as the fifth president of the institute.[2]

From 1980 to 1990, Dostrovsky headed the Weizmann Institute's Center for Energy Research.[5] He also founded the institute's solar-energy research center.[1] His memberships in the Israel Academy of Sciences and Humanities and the New York Academy of Sciences reflected his standing in the scientific community.[1][5]

Dostrovsky's return in 1948 coincided with Israel's War of Independence. He served with the rank of major in the Israel Defense Forces' Science Corps, known by its Hebrew acronym HEMED.[4] Within the corps, he created HEMED GIMMEL, described in the cited biographical note as the unit that "led the way to the nuclear project."[4]

Dostrovsky recruited Technion geologists Akiva Frohman and Yaakov Ben-Tor to HEMED.[7] The three conducted geological mapping in the Negev while searching for phosphate and uranium deposits. During this work, they discovered a previously unknown mineral that was named bentorite.[7] All three later became Israel Prize laureates.[7]

Dostrovsky's involvement in Israel's nuclear program extended beyond his Science Corps service. In a retrospective memoir excerpt published by Ynet, Shimon Peres described Dostrovsky as one of the first members—and, for a considerable period, the sole member—of the team assembled for the Dimona reactor project.[8] Peres credited Dostrovsky and physicist Ernest David Bergmann with supplying the project's scientific knowledge base, while distinguishing their contribution from project management, which he attributed to Emmanuel (Manes) Paret.[8]

Peres also recalled that Dostrovsky had invented a heavy-water production process and sold it to the French years before joining the reactor project.[8] When Dostrovsky became director-general of the Israel Atomic Energy Commission, the Jewish Virtual Library biographical note described him as formally heading the nuclear project.[4] A later Ynet profile characterized him as one of the founding figures of Israel's nuclear project.[9]

Dostrovsky's scientific work ranged across several disciplines. At the Weizmann Institute, he initiated experimental nuclear-chemistry research, designed an isotope-separation plant, and developed techniques for separating hydrogen and oxygen isotopes.[1][3] The institute subsequently became an important supplier of oxygen isotopes used in research on organic processes.[3]

His chemical process for producing heavy water was among his most consequential practical achievements.[6] The method replaced a lengthy and expensive electrical process with a chemical alternative and contributed to closer Israeli-French relations.[6]

Later in his career, Dostrovsky designed and built a gallium-germanium neutrino detector for an international experiment in the Gran Sasso tunnel in Italy.[3] The experiment provided the first solid experimental verification of physicist John Bahcall's claim about missing solar neutrinos, a central problem in solar and neutrino physics.[3]

During Dostrovsky's presidency of the Weizmann Institute, he was a partner and principal intellectual originator of a large tandem particle accelerator project alongside physicist Gabi Goldring.[9] A tandem accelerator first draws a negatively charged particle toward its center, changes it to a positive charge, and then accelerates it toward the opposite end.[9] The resulting facility occupied a 56-meter structure whose construction cost was estimated at six million dollars. Dozens of physicists and technicians worked there for more than thirty years before it was retired from scientific use in 2010.[9]

Israel Dostrovsky died at home in 2010 at the age of ninety-two.[2] His career extended from doctoral research in wartime Britain to the formative laboratories of the Weizmann Institute, Israel's early nuclear institutions, national science administration, and later research in solar energy and neutrino physics.

Dostrovsky received the Israel Prize for exact sciences in 1995.[1][5] His other honors included the Ramsey Medal and Prize, Tel Aviv's Weizmann Prize, and honorary doctorates from Tel Aviv University and the Technion–Israel Institute of Technology.[5] When he turned eighty, the Israel Academy of Sciences and Humanities held a special scientific conference in Jerusalem and at the Weizmann Institute in his honor.[5]

He was a member of the Israel Academy of Sciences and Humanities and an honorary life member of the New York Academy of Science.[1][5] The National Library of Israel also lists him as an oral-history interviewee in its Weizmann Institute of Science history collection under the heading for members of the Israel Academy of Sciences and Humanities.[10]

Dostrovsky's institutional legacy included the Isotope Research Department he led, the solar-energy research center he founded, and the tandem particle accelerator project he helped originate. His service in HEMED GIMMEL and the Israel Atomic Energy Commission also placed him among the scientists who shaped Israel's early nuclear infrastructure.

Sources differ modestly on the start of Dostrovsky's tenure as director-general of the Israel Atomic Energy Commission. The Encyclopaedia Judaica gives 1965, while the Jewish Virtual Library document gives 1966 and describes him as the first director-general of the newly organized commission.[1][4]

Accounts of Dostrovsky's connection to the Dimona reactor project include Shimon Peres's retrospective recollection of his early and central involvement.[8] Peres's account is a first-person memoir, and the cited sources do not establish that Dostrovsky personally directed weapons production. They do, however, document scientific and organizational roles in Israel's early nuclear infrastructure.[4][8]