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Antihelium-3 nuclei ( ) were first observed in the 1970 s in proton–nucleus collision experiments at the Institute for High Energy Physics by Y. Prockoshkin 's group ( Protvino near Moscow , USSR ) and later created in nucleus–nucleus collision experiments .
 Institute for High Energy Physics, Y. Prockoshkin, Protvino, Moscow, USSR
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Answer:
 Institute for High Energy Physics, Y. Prockoshkin, Protvino, Moscow, USSR