C6_cx_1_adas Function

  1. atomic_tables.f90
  2. atomic_tables
  3. C6_cx_1_adas

public function C6_cx_1_adas(eb) result(sigma)

Calculates the total charge exchange cross section for a Neutral Hydrogen atom in the state colliding with a fully stripped Carbon ion at energy eb

Equation

References

Arguments

TypeIntentOptionalAttributesName
real(kind=Float64), intent(in) :: eb

Relative collision energy [keV/amu]

Return Value real(kind=Float64)

Cross Section []


Called by

proc~~c6_cx_1_adas~~CalledByGraph proc~c6_cx_1_adas C6_cx_1_adas proc~aq_cx_n_adas Aq_cx_n_adas proc~aq_cx_n_adas->proc~c6_cx_1_adas proc~aq_cx_n Aq_cx_n proc~aq_cx_n->proc~aq_cx_n_adas proc~aq_cx Aq_cx proc~aq_cx->proc~aq_cx_n proc~write_bb_h_aq write_bb_H_Aq proc~write_bb_h_aq->proc~aq_cx program~generate_tables generate_tables program~generate_tables->proc~write_bb_h_aq

Contents

Source Code

C6_cx_1_adas

Source Code

function C6_cx_1_adas(eb) result(sigma)
    !+ Calculates the total charge exchange cross section for a Neutral Hydrogen atom
    !+in the \(n=1\) state colliding with a fully stripped Carbon ion at energy `eb`
    !+
    !+###Equation
    !+$$ C^{6+} + H(1) \rightarrow C^{5+} + H^+ $$
    !+
    !+###References
    !+* Ref. 4 [[atomic_tables(module)]]
    real(Float64), intent(in) :: eb
        !+ Relative collision energy [keV/amu]
    real(Float64)             :: sigma
        !+ Cross Section [\(cm^2\)]

    real(Float64), dimension(7), parameter :: A = [2.007882674d2, -3.546893286d2, &
                                                   2.381542403d2, -8.355431742d1, &
                                                   1.617519888d1, -1.638152470d0, &
                                                   6.768953863d-2 ]

    real(Float64) :: e, l, p, m

    e = max(eb*1.d3,1.5d3)
    if(eb.le.500) then
        l = log10(e)
        p = A(1) + A(2)*l + A(3)*l**2 + A(4)*l**3 + &
            A(5)*l**4 + A(6)*l**5 + A(7)*l**6
    else
        l = log10(500*1.d3)
        p = A(1) + A(2)*l + A(3)*l**2 + A(4)*l**3 + &
            A(5)*l**4 + A(6)*l**5 + A(7)*l**6
        m = A(2) + 2*A(3)*l + 3*A(4)*l**2 + &
            4*A(5)*l**3 + 5*A(6)*l**4 + 6*A(7)*l**5
        p = p + m*(log10(e) - l)
    endif
    sigma = 10.d0**p

end function C6_cx_1_adas