The theoretical study on PuHn+ (n = 1,2,3) using density functional method(
B3LYP) shows that PuH+ and PuH2+ can be stable and PuH3+ ((7)Sigma (-)) ca
nnot be stable. Electronic ground states are X (7)Sigma (-) (PuH+) and X(8)
Sigma (-) (PuH2+) ,and their force constants and spectroscopic data have be
en worked out.