TY - JOUR
T1 - Radium, actinides, and their molecular negative ions from a cesium sputter ion source
AU - Zhao, X. L.
AU - Nadeau, M. J.
AU - Garwan, M. A.
AU - Kilius, L. R.
AU - Litherland, A. E.
PY - 1994/6/3
Y1 - 1994/6/3
N2 - The negative ions of the isotopes 226Ra, 231Pa and 244Pu, produced by a Cs sputter ion source, have been observed for the first time using the IsoTrace heavy element AMS system. The properties of these negative ions have been compared with those of Th and U, and the electron affinities of all these elements (Ra, Th, Pa, Th and Pu) have been found to be similar and greater than 50 meV. Some molecular negative ions of these elements, in particular carbides and oxides, have also been measured. It was found that di-carbide is generally a profitable molecule form for measuring Ra, Th and Pa, while mono-oxide is more efficient for measuring U and Pu.
AB - The negative ions of the isotopes 226Ra, 231Pa and 244Pu, produced by a Cs sputter ion source, have been observed for the first time using the IsoTrace heavy element AMS system. The properties of these negative ions have been compared with those of Th and U, and the electron affinities of all these elements (Ra, Th, Pa, Th and Pu) have been found to be similar and greater than 50 meV. Some molecular negative ions of these elements, in particular carbides and oxides, have also been measured. It was found that di-carbide is generally a profitable molecule form for measuring Ra, Th and Pa, while mono-oxide is more efficient for measuring U and Pu.
UR - https://www.scopus.com/pages/publications/0041795528
U2 - 10.1016/0168-583X(94)96016-X
DO - 10.1016/0168-583X(94)96016-X
M3 - Article
AN - SCOPUS:0041795528
SN - 0168-583X
VL - 92
SP - 258
EP - 264
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-4
ER -