How do I write source item Angle distributions with openmc

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1

I’m a new openmc learner. Show me how to write the Angle distribution of source items using openmc. For example, how to change the following mcnp source input file to openmc source input file

mcnp source input file：

sdef erg=1  dir d11  vec=0 0 1 pos=0 0 0 rad d3 par=1  sur=12
si11    h  -1
           -8.3333E-01
           -6.6667E-01
           -5.0000E-01
           -3.3333E-01
           -1.6667E-01
           -1.6653E-16
           1.6667E-01
           3.3333E-01
           5.00E-01
           6.6667E-01
           8.3333E-01
           1.0000E+00
sp11    d  0.00E+00
           1.85707E+09
           1.49444E+09
           1.13483E+09
           8.09007E+08
           4.99258E+08
           1.78021E+08
           6.81487E+09
           2.36656E+10
           4.60596E+10
           8.03512E+10
           1.29569E+11
           1.95254E+11
SI3 0 7.5

thanks very mush！