diff --git a/data/collisions/IO_e-Kr.dat b/data/collisions/IO_e-Kr.dat
new file mode 100644
index 0000000..532ca4d
--- /dev/null
+++ b/data/collisions/IO_e-Kr.dat
@@ -0,0 +1,52 @@
+# D108525 "refs": {"B56": {"note": "CLM-R294 (1989)"}}
+# Relative energy (eV) cross section (m^2)
+1.40E+01 0
+1.62E+01 7.249E-21
+1.88E+01 1.199E-20
+2.18E+01 1.644E-20
+2.53E+01 2.1E-20
+2.94E+01 2.542E-20
+3.41E+01 2.937E-20
+3.95E+01 3.26E-20
+4.58E+01 3.499E-20
+5.32E+01 3.653E-20
+6.17E+01 3.726E-20
+7.15E+01 3.728E-20
+8.29E+01 3.671E-20
+9.62E+01 3.566E-20
+1.12E+02 3.426E-20
+1.29E+02 3.259E-20
+1.50E+02 3.075E-20
+1.74E+02 2.881E-20
+2.02E+02 2.682E-20
+2.34E+02 2.484E-20
+2.72E+02 2.289E-20
+3.15E+02 2.101E-20
+3.65E+02 1.922E-20
+4.24E+02 1.751E-20
+4.91E+02 1.592E-20
+5.70E+02 1.443E-20
+6.61E+02 1.305E-20
+7.67E+02 1.177E-20
+8.89E+02 1.06E-20
+1.03E+03 9.526E-21
+1.20E+03 8.547E-21
+1.39E+03 7.658E-21
+1.61E+03 6.851E-21
+1.87E+03 6.121E-21
+2.16E+03 5.462E-21
+2.51E+03 4.868E-21
+2.91E+03 4.334E-21
+3.38E+03 3.855E-21
+3.92E+03 3.426E-21
+4.54E+03 3.041E-21
+5.27E+03 2.698E-21
+6.11E+03 2.391E-21
+7.09E+03 2.118E-21
+8.22E+03 1.875E-21
+9.53E+03 1.658E-21
+1.11E+04 1.466E-21
+1.28E+04 1.295E-21
+1.49E+04 1.143E-21
+1.72E+04 1.009E-21
+2.00E+04 8.898E-22