SO2    ICE
   (density of 1.3x10^22 molecules/cm^3 used to calculate electronic
    [dE/dx]e and collisional [dE/dx]n energy loss in eV/A#. The incident
      angle is zero unless indicated.)

  ion    E(keV)   v(au)   T(K)   angle   Yield     [dE/dx]e    [dE/dx]n  ref

  H+        1500          7.8          10                        .13            2.062            .0014         (2)
  H+         400           4.0                                       2.9           4.77              .0041

  H2+      1500          5.49        10                         1.6            6.53             .0049

  He+      1500          3.88        10                      17.5(50)*    18.50            .0188

  He+      1500          3.88        10                           17           18.50            .0188         (1)
                                                  35                          18
                                                  40                          20
                                                  50                          16
                                                  60                          17
                                                  75                          22
                                                  80                          30
                                                  85                          32
                                                  90                          32
                                                  95                          45
                                                 100                         55
                                                 110                         75

  O+         1500         1.94         10                        2000           95.58            1.0           (2)

  F+2        1600         1.84                                     3500           82.14            1.152
  F+3        6000          3.6                                      7300         131.00            .400
  F+3        7500          4.0                                      6400         132.80            .334
  F+4      15000          5.6                                      3600         129.90            .186
                20000         6.5                                       2050        123.00            .146
  F+5       25000         7.3                                      1600         115.70            .120

  Ne+         45            .30           77                        (92)**         8.05            13.43

  Ar+      1500           1.23         10                         6300          77.15            7.412
                   45              .21                                        215          11.44            36.43
                   30              .17                                        180           9.46             37.99
                   15              .12                                        170           6.83             38.14


** Virginia - relative signal at 45 degree to normal
*  timbrello (angle 30 degree to normal)

# These are charge - state equilibrium stopping process from SRIM:
      http://www.research.ibm.com/ionbeams/home.htm#SRIM
 

(1) Brown, W.L. et al. Ion-Induced Chemistry in Condensed Gas Solids,
      Nucl. Instrum. & Methods 218 (1983) 707-711.
(2) Lepoire, D.J. et al., Sputtering of SO2 by High Energy Ions.
      Radi. Effe. 71 (1983) 245-259.

Last Updata: Oct. 9, 2000
 

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