CO2    ICE
   (density of 2.3x10^22 molecules/cm^3 used to calculate electronic
    [dE/dx]e and collisional [dE/dx]n energy loss in eV/A#. The incident
      angl is zero unless indicated.)

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


  D+       1500           5.49                                     1.7           4.45             .0035          (1)

  H+       1500           7.77         10                         95           2.84             .0017
                                                   20                       114
                                                   28                       110
                                                   32                       152
                                                   35                       292
                                                   40                       304
                                                   48                       380
                                                   49                       473
                                                   54                       693
                                                   60                       711
                                                   70                       704
  H+        1500          7.77          77                       626
  H+           40           1.27                                     230            7.82            .0348
  H+         750           5.49                                   55 (47)        4.37            .0032
  H+         750           5.49                                        2             4.37            .0032
  H+       1500           7.77                                     (17)           2.84            .0017
  H+       1500           7.77          70                       120            2.84            .0017
  H+       1500           7.77                                     <1.5          2.84            .0017
  H2+     1500           5.49                                160.8 (135)    8.74            .0064

  He+     1500           3.88          78                        850          24.98           .0244
 3He+    1500           2.24                                       50           22.00           .0184
 4He+    1500           1.94                                      120          24.98           .0244

  He+     1500           3.88          10                        120          24.98           .0244          (2)
                                                    20                       115
                                                    27                       110
                                                    35                       130
                                                    40                       280
                                                    50                       350
                                                    60                       650
                                                    70                       620
                                                    80                       600

  C+       1500          2.24                                     12500         93.65           .506           (1)
  C+       1500          2.24                                     10000         93.65           .506
                                                                            (15000)
  O+       1500          1.94                                     19500        103.4           1.094
  O+       1500          1.94                                     14000        103.4           1.094
                                                                            (25000)


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

(1) Brown, W.L., et al., Erosion and Molecule  Formation in Condensed
       Gas Film by Electronic Energy Loss of Fast Ions.
      Nucl. Instrum. & Methods 198 (1982) 1-8.
(2)  Brown, W.L. et al., Ion-Induced Chemistry in Condensed Gas Solids.
       Nucl. Instrum. & Methods 218 (1983) 707-711.

Last Updata: Oct. 9, 2000
 

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