ions produced in a cooled supersonic expansion by electron-impact ionization are accelerated at 2.5 keV and kept during few milliseconds inside a linear electrostatic trap. The lifetime of the metastable ion is determined from the measurement of the rate of the argon atoms escaping the trap. The lifetime and the relative metastable populations are measured as a function of the pressure and temperature in the supersonic expansion, i.e., of the mean cluster size. Possible mechanisms responsible for the metastable formation are discussed.
REFERENCES
1.
J. J.
Erwing
, IEEE J. Sel. Top. Quantum Electron.
6
, 1051
(2000
).2.
S.
Stephan
, A.
Stamatovic
, and T. D.
Märk
, Phys. Rev. A
28
, 3105
(1983
).3.
S.
Stephan
and T. D.
Märk
, Phys. Rev. A
32
, 1447
(1985
).4.
B. J.
Whitaker
, C. A.
Woodward
, P. J.
Knowles
, and A. J.
Stace
, J. Chem. Phys.
93
, 376
(1990
).5.
A. J.
Stace
, C. A.
Woodward
, and B. J.
Whitaker
, Chem. Phys. Lett.
184
, 113
(1991
).6.
J.
Fedor
, R.
Parajuli
, S.
Matt-Leubner
, O.
Echt
, F.
Hagelberg
, K.
Gluch
, A.
Stamatovic
, M.
Probst
, P.
Scheir
, and T. D.
Märk
, Phys. Rev. Lett.
91
, 133401
(2003
).7.
J.
Fedor
, K.
Gluch
, R.
Parajuli
, S.
Matt-Leubner
, O.
Echt
, P.
Scheir
, and T. D.
Märk
, J. Chem. Phys.
121
, 7253
(2004
).8.
M.
Sizun
(private communication).9.
S.
Matt-Leubner
, J.
Fedor
, R.
Parajuli
, A.
Stamatovic
, O.
Echt
, F.
Hagelberg
, K.
Gluch
, M.
Probst
, P.
Scheir
, and T. D.
Märk
, Phys. Chem. Chem. Phys.
7
, 1043
(2005
).10.
K.
Norwood
, J. H.
Guo
, and C. Y.
Ng
, J. Chem. Phys.
90
, 2995
(1989
).11.
H.
Yoshii
, T.
Hayaishi
, T.
Onuma
, T.
Aoto
, Y.
Morioka
, and K.
Ito
, J. Chem. Phys.
117
, 1517
(2002
).12.
H.
Haberland
, Surf. Sci.
156
, 305
(1985
).13.
M.
Grigonov
and F.
Spiegelmann
, Surf. Rev. Lett.
3
, 211
(1996
).14.
D.
Hrivnak
and R.
Kalus
, Chem. Phys.
264
, 319
(2001
).15.
R.
Karnbach
, M.
Josppien
, J.
Stapefeldt
, J.
Wörmer
, and T.
Möller
, Rev. Sci. Instrum.
64
, 2838
(1993
).16.
Y. H.
Chiu
, S.
Pullins
, D. J.
Levandier
, and R. A.
Dressler
, J. Chem. Phys.
112
, 10880
(2000
).17.
R.
Wester
, K. G.
Bhusham
, N.
Altstein
, D.
Zajfman
, O.
Heber
, and M. L.
Rappaport
, J. Chem. Phys.
110
, 11830
(1999
).18.
H. B.
Pedersen
, D.
Stasser
, S.
Ring
, O.
Heber
, M. L.
Rappaport
, Y.
Rudich
, I.
Sagi
, and D.
Zajfman
, Phys. Rev. Lett.
87
, 055001
(2001
).19.
H. B.
Pedersen
, D.
Stasser
, O.
Heber
, M. L.
Rappaport
, and D.
Zajfman
, Phys. Rev. A
65
, 042703
(2002
).20.
H. B.
Pedersen
, D.
Stasser
, B.
Amarant
, O.
Heber
, M. L.
Rappaport
, and D.
Zajfman
, Phys. Rev. A
65
, 042704
(2002
).21.
D.
Attia
, D.
Stasser
, O.
Heber
, M. L.
Rappaport
, and D.
Zajfman
(unpublished).22.
L. H.
Andersen
, O.
Heber
, and D.
Zajfman
, J. Phys. B
37
, R57
(2004
).23.
U.
Buck
and R.
Krohne
, J. Chem. Phys.
105
, 5408
(1996
).24.
O. F.
Hagena
, Surf. Sci.
106
, 101
(1981
).25.
O. F.
Hagena
, Z. Phys. D: At., Mol. Clusters
4
, 291
(1987
).26.
H. P.
Godfried
and I. F.
Silvera
, Phys. Rev. A
27
, 3008
(1982
).27.
W. R.
Wadt
, J. Chem. Phys.
68
, 402
(1978
).28.
A.
Wüest
and F.
Merkt
, J. Chem. Phys.
120
, 638
(2004
).29.
30.
© 2005 American Institute of Physics.
2005
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