메뉴 건너뛰기




Volumn 60, Issue 2, 1999, Pages 1235-1239

Tin clusters adopt prolate geometries

Author keywords

[No Author keywords available]

Indexed keywords


EID: 0000070036     PISSN: 10502947     EISSN: 10941622     Source Type: Journal    
DOI: 10.1103/PhysRevA.60.1235     Document Type: Article
Times cited : (108)

References (66)
  • 52
    • 85037217611 scopus 로고    scopus 로고
    • This calculation is performed using the exact hard spheres scattering (EHSS) model
    • This calculation is performed using the exact hard spheres scattering (EHSS) model 48. However, a sphere has no concave surface elements, so its EHSS collision integral equals 48 the orientationally averaged projection determined by the projection approximation 18. The He collision radius of (Formula presented) was assumed.
  • 54
    • 85037195054 scopus 로고    scopus 로고
    • Because of the upper limit of quadrupole mass spectrometer range equal to ∼4000 amu
    • Because of the upper limit of quadrupole mass spectrometer range equal to ∼4000 amu 21, this transition has been followed for the doubly charged (Formula presented) cations. However, the structures of (Formula presented) and (Formula presented) for the slightly smaller sizes (Formula presented) are very similar 21. We have also found that the structural transitions in (Formula presented) and (Formula presented) take place over the exact same size range of (Formula presented) [A. A. Shvartsburg and M. F. Jarrold (unpublished)].
  • 55
    • 85037214055 scopus 로고    scopus 로고
    • A. A. Shvartsburg and M. F. Jarrold (unpublished). The conclusion 21 that the large (Formula presented) clusters are not spherical preceded the development of sophisticated techniques 485152 for the modeling of gas phase mobilities of polyatomic ions.
    • Shvartsburg, A.A.1    Jarrold, M.F.2
  • 62
    • 85037232993 scopus 로고    scopus 로고
    • The collision integrals of all species are inversely correlated with buffer gas temperature. In calculations, this can be crudely accounted for via a temperature-dependent He collision radius
    • The collision integrals of all species are inversely correlated with buffer gas temperature. In calculations, this can be crudely accounted for via a temperature-dependent He collision radius 5859. When evaluating the cross sections for spheres at 78 and 378 K, we have adjusted R so that the values for the smallest (Formula presented) clusters, the mobilities of which are only weakly sensitive to geometry 2223, would match those found at 305 K. This has produced (Formula presented) at 78 K and 1.09 Å at 378 K (assuming the bulk density of β-tin).
  • 66
    • 85037219447 scopus 로고    scopus 로고
    • For larger clusters, the values at 305 K appear to be slightly higher. It is not clear at this juncture if this carries any structural information. It might be due to a marginal thermal annealing
    • For larger clusters, the values at 305 K appear to be slightly higher. It is not clear at this juncture if this carries any structural information. It might be due to a marginal thermal annealing.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.