TY - JOUR
T1 - Positive identification of XeH- molecular ion
AU - Boaretto, E.
AU - Berkovits, D.
AU - Hollos, G.
AU - Paul, M.
PY - 1990/12/2
Y1 - 1990/12/2
N2 - We describe in the present work the observation of XeH- molecular ions from a standard Hiconex 834 source in which a sputter target of AgI mixed with Ag was sprayed with Xe gas. The formation of XeH- ions is positively demonstrated by identifying 129Xe and 131Xe by AMS analysis and energy and time-of-flight measurements, when negative ions of mass 130 and 132, respectively, are injected into the 14UD Rehovot Pelletron tandem accelerator. No evidence for the formation of Xe- ions was found. The dependence of the intensity of the xenon group on the xenon gas pressure in the ion source shows that the probability of formation of XeH- is very low and should not pose a significant background problem under normal circumstances in AMS measurements of 129I.
AB - We describe in the present work the observation of XeH- molecular ions from a standard Hiconex 834 source in which a sputter target of AgI mixed with Ag was sprayed with Xe gas. The formation of XeH- ions is positively demonstrated by identifying 129Xe and 131Xe by AMS analysis and energy and time-of-flight measurements, when negative ions of mass 130 and 132, respectively, are injected into the 14UD Rehovot Pelletron tandem accelerator. No evidence for the formation of Xe- ions was found. The dependence of the intensity of the xenon group on the xenon gas pressure in the ion source shows that the probability of formation of XeH- is very low and should not pose a significant background problem under normal circumstances in AMS measurements of 129I.
UR - http://www.scopus.com/inward/record.url?scp=44949289632&partnerID=8YFLogxK
U2 - 10.1016/0168-583X(90)90449-5
DO - 10.1016/0168-583X(90)90449-5
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AN - SCOPUS:44949289632
SN - 0168-583X
VL - 52
SP - 421
EP - 423
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 - 3-4
ER -