CO   ICE
   (density of 2.2 x10^22 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          45         2.5            3.13           .0019      (1)
                 750        5.5         10          45         6.0            4.93           .0035

  H+         10           0.63       10          45         12             3.19           .058        (2)
                13           0.72       10          45          14            3.51           .0484
                16             .80       10          45          13            3.77           .0419
                17             .83       10          45          18            3.86           .0402
                20             .90       10          45          16            4.09           .0358
                25           1.00       10          45          20            4.42           .0305
                32           1.13       10          45          25            4.81           .0254
                50           1.42       10          45          30            5.51           .0181
                60           1.55       10          45          32            5.76           .0157
                70           1.68       10          45          30            5.95           .0139
              200           2.84       10          45          22            5.58           .0059
              250           3.17       10          45          18            5.10           .0049
              310           3.53       10          45          16            4.52           .0040
              350           3.75       10          45          12            4.31           .0039
              400           4.01       10          45          12            3.99           .0033
              440           4.21       10          45            6            3.80           .0031
              500           4.48       10          45          11            3.51           .0028
              600           4.91                                     8.5         3.14           .0024
              700           5.38                                     6.2         2.86           .0021
              800           5.67                                     6            2.63           .0018
            1000           6.34                                    2.4          2.28           .0015
            1000           6.34                                     4           2.28            .0015
            1400           7.50                                    2.2         1.83            .0011
            2000           8.97                                     2           1.43            .0008
            2200           9.41                                    1.2         1.33            .0007
            3000         10.99        10          45            1          1.06            .0006

  He+    1500          3.88        10                      220          27.84           .027        (1)
               750           2.74                                 300          32.82           .048

  e              2          12.10                                (0.6)                                            (3)

  He+       10           0.32        10          45          31           2.53           .6343       (2)
                16           0.40                                    40           3.47           .4829
                30           0.55                                    50           5.13           .3223
                40           0.63                                    60           6.05           .2645
                52           0.72                                    82           6.93           .2199
                65           0.81                                   100          7.75           .1868
             1000          3.17                                   400         17.61          .0211
             1000          3.17                                   320         17.61          .0211
             1200          3.47                                   300         16.78          .0181
             1300          3.62                                   220         16.35          .0169
             1300          3.62                                   200         16.35          .0169
             2000          4.48                                   150         13.58          .0117
             2200          4.70                                   120         12.93          .0107
             2600          5.11                                   110         11.81          .0093
             2800          5.31                                     80         11.32          .0087
             3000          5.49         10          45          80         10.88          .0082



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

(1) Brown, W.L. et al. Sputtering of Ices by High Energy Particle Impact,
      Nucl. Instrum. & Methods B14 (1986) 392-402.
(2) Chrisey, D.B. et al.,Electronic Excitation of condensed co: Sputtering
      and Chemical Charge, Surf. Sci. 225 (1990) 130-142.
(3) Schou, J. et al., Electronic Sputtering of CO. Brenning, W., Menzel,
      D.(eds) Desorption induced by Electronic Transitions DIET II.
       Springer, Berlin Heidelberg New York, (1985) pp. 170-173.
 

Last Updata: April 5, 2001
 

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