The Soviets developed their first nuclear devices largely on their own; though findings from espionage certainly accelerated the effort, it wasn't like the entire conceptual design was simply "leaked" to them. As to the Rosenbergs -
the article you just read makes it clear that while she apparently knew of her husband's doing, “she did not engage in the work herself” (per the leaked memo). But of course she had to be sent to the chair anyway.
And whatever help Julius did provide was apparently of minimal value:
The notes allegedly typed by Ethel apparently contained little that was directly used in the Soviet atomic bomb project.[63] According to Julius's contact Feklisov, the Rosenbergs did not provide the Soviet Union with any useful material about the atomic bomb: "He [Julius] didn't understand anything about the atomic bomb and he couldn't help us."
General Leslie Groves, who developed the American nuclear program as part of the Manhattan Project, said during a United States Atomic Energy Commission hearing on Robert Oppenheimer that he thought that "the data that went out in the case of the Rosenbergs was of minor value" and that he "always felt the effects were greatly exaggerated, that the Russians did not get too much information out of it". Groves requested that this "should be kept very quiet" as he still believed the Rosenbergs deserved to die. This part of his testimony was redacted from the publicly released 1954 transcript of the Commission's hearing on Oppenheimer and remained classified until 2014.
The Soviets developed their first nuclear devices largely on their own; though findings from espionage certainly accelerated the effort, it wasn't like the entire conceptual design was simply "leaked" to them. As to the Rosenbergs - the article you just read makes it clear that while she apparently knew of her husband's doing, “she did not engage in the work herself” (per the leaked memo). But of course she had to be sent to the chair anyway.
And whatever help Julius did provide was apparently of minimal value:
https://en.wikipedia.org/wiki/Julius_and_Ethel_Rosenberg