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38 lines
1.2 KiB
OCaml
38 lines
1.2 KiB
OCaml
(** Representation for two-electron operators expressed in a Gaussian basis set. *)
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type t =
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{
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coef_g : float array;
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expo_g : float array;
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expo_g_inv : float array;
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}
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let make coef_g expo_g =
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let expo_g_inv =
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Array.map (fun x -> 1. /. x ) expo_g
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in
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{ coef_g ; expo_g ; expo_g_inv }
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let one_over_r =
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let coef_g = [|
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841.88478132 ; 70.590185207 ; 18.3616020768 ; 7.2608642093 ;
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3.57483416444 ; 2.01376031082 ; 1.24216542801 ; 0.81754348620 ;
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0.564546514023 ; 0.404228610699 ; 0.297458536575 ; 0.223321219537 ;
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0.169933732064 ; 0.130190978230 ; 0.099652303426 ; 0.075428246546 ;
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0.0555635614051 ; 0.0386791283055 ; 0.0237550435652 ; 0.010006278387 ;
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|]
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and expo_g =
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[| 84135.654509 ; 2971.58727634 ; 474.716025959 ; 130.676724560 ;
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47.3938388887 ; 20.2078651631 ; 9.5411021938 ; 4.8109546955 ;
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2.52795733067 ; 1.35894103210 ; 0.73586710268 ; 0.39557629706 ;
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0.20785895177 ; 0.104809693858 ; 0.049485682527 ; 0.021099788990 ;
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0.007652472186 ; 0.0021065225215 ; 0.0003365204879 ; 0.0000118855674 |]
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in make coef_g expo_g
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