Energy redistribution in cluster-surface collision

I2 - (CO2)n onto silicon surface

Hisato Yasumatsu, Shin'ichi Koizumi, Akira Terasaki, Tamotsu Kondow

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Fragmentation of I2 - (CO2)n (n= 1-30) by its collision on a silicon surface was investigated by measuring the fragment anions and their translational energy parallel to the surface (surface-parallel translational energy) in a tandem time-of-flight mass spectrometer equipped with a collision chamber evacuated down to ∼ 10-8 Pa. At the collision energy (per 12 -) of 50 eV and the incident angle of 26° with respect to the surface normal, the distributions of the surface-parallel translational energies of the fragment anions from a given parent cluster anion were found to obey the one-dimensional Maxwell-Boltzmann distribution with the same translational temperature, Ts∥ The results show that the cluster anion and its neighboring surface atoms reach quasiequilibrium before the fragment anions leave the surface. A general increasing trend of Ts∥ (6000-12 000 K) with n is interpreted as an increasing extent of cluster-impact heating with n, while the reduction of Ts∥ in the 13≤n≤∼ 19 range is attributable to efficient transmission of the I- and I2 - translational energies to the CO2 solvent cage. The effective volume and pressure of I2 -(CO2)n colliding on the surface were estimated; at n = 10, the volume and the pressure were 100 nm3 and 10 MPa, respectively.

Original languageEnglish
Pages (from-to)9509-9514
Number of pages6
JournalJournal of Chemical Physics
Volume105
Issue number21
DOIs
Publication statusPublished - 1996
Externally publishedYes

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Silicon
collisions
Anions
silicon
anions
energy
fragments
Boltzmann distribution
Mass spectrometers
mass spectrometers
fragmentation
chambers
trends
Heating
Atoms
heating
atoms

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Energy redistribution in cluster-surface collision : I2 - (CO2)n onto silicon surface. / Yasumatsu, Hisato; Koizumi, Shin'ichi; Terasaki, Akira; Kondow, Tamotsu.

In: Journal of Chemical Physics, Vol. 105, No. 21, 1996, p. 9509-9514.

Research output: Contribution to journalArticle

Yasumatsu, Hisato ; Koizumi, Shin'ichi ; Terasaki, Akira ; Kondow, Tamotsu. / Energy redistribution in cluster-surface collision : I2 - (CO2)n onto silicon surface. In: Journal of Chemical Physics. 1996 ; Vol. 105, No. 21. pp. 9509-9514.
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