I have a PDF article somewhere on their fates. A few actually willingly went over to the Russians and were offered genuinely favourable terms to help Stalin's nuclear weapons project. Houtermanns from memory was one.
He had persuaded Hitler to attempt to build a Plutonium A-bomb which led to an awful; lot of wasted effort and resources. To get Plutonium one must first build a working (slow neutron) heavy water reactor, run it for two years and then cool the spent fuel for 3 years, then spend a few months chemically seperating Plutonium from Uranium 238 and other metals, before making a bomb.
My hunch is that Houtermanns who had spent time in Russia pre-war was probably a spy for Stalin and latched on to the elderly Prof Schintlemeister to persuade Hitler to waste resources to slow down Germany's nuclear ambitions. At the end of the war he voluntarily went across to the Soviets.
The attack on Norway's Voermark heavy water plant sabotaged the Plutonium A-bomb. Germany had other sources of Heavy water from another plant known as the Beck Plant, but Hiesenberg failed miserably in sustaining a nuclear reaction.
Hitler issued a nero decree in March 1945 for all 450 Penemunde engineers and the Heereswaffenamt (HWA) scientists under Kurt Diebner to be executed to prevent their capture by the Soviets.
Kammler organised a special train to get the whole Penemunde team to Bavaria and risked arrest by the Gestapo to do this. Kammler also organised for the HWA team to be secretly evacuated from Liepzig and taken to Bavaria. It is no co-incidence that US forces abandoned their drive north to Berlin and instead turned south to occupy southern Germany which was designated for French control. ALSOS drove clear across Germany in a bunch of jeeps to take the surrender of these scientists at Garmisch Partikirchen. Kammler planned to save these scientists for ALSOS.
Kammler disappeared near Prague about 28 April 1945, but Hitler ordered his arrest and execution on 27 April 45. There is said to have been a Ju-290 evacuation of SS men from Prague to Barcelona on the night of 27 April.
Diebner and Harteck were taken into custody and interrogated by the British at Farm Hall where their conversations were evesdroped with electronic listening devices.
It became apparent from Diebner's remarks to others that he guessed they were being bugged and warned other scientists to divulge nothing. That is why I call Heisenberg a clown because he hammed it up and quite obviously exploited the listening devices to disinform those listening to him that he knew nothing and to spread the false idea that he was secretly anti Nazi.
The British concluded that Heisenberg was harmless and allowed him to return to nuclear physics. Deibner and Harteck however were seen as too dangerous and were banned from working in any of the nuclear sciences post war.
He took menial work and ended up dying in the 70s without divulging his memoirs. I am not sure of Harteck's fate, however South Africa adopted the Harteck process post war for it's own nuclear project so my guess is he helped them.
Those who co-operated were taken in 1945 to an island in Boston harbour as part of Operation Overcast to assist USA to defeat the Japanese. There was undoubtedly knowledge amongst Nazi scientists about Nishina's nuclear project in North Korea and I would say there was an extensive debrief at Boston.
All this is just from memory and some stage I shall pull out the PDF I referred to. Have to find it first.
PS General Peron also aquired the Nazi Bell project which harnessed the ionising of mercury compounds in a spinning bell shaped centrifuge to produce a kind of mini neutron bomb device. The ionising radiation killed people within a quarter mile radius and is known to have disrupted the engines of overflying B-17s on one occasion. Peron believed this device would give him a nuclear weapon, but in fact it was overenthusiastic salesmanship by exiled Nazis.