Klochkov Mikhail Alexandrovich RussiaSaratov State University, 410012, Russia, Saratov, Astrakhanskaya street, 83Доцентmikhklochkov@yandex.ru Author's articles Range of Gamma Quanta in the Beryllium Target Power Range of Photoneutrons from 209Bi at Е γmax = 12 MeV