In December NUMBER@1 , the MISC@1 chemists PERSON@1 and PERSON@2 sent a manuscript to LOCATION@1 reporting they had detected the element barium after bombarding uranium with neutrons ; PERSON@3 and PERSON@4 .

This process was discovered in December NUMBER@1 by the MISC@1 nuclear chemist PERSON@1 and his assistant PERSON@2 in LOCATION@2 .
