Function adas.r8ah

def r8ah(nu, lu, nl, ll)

Calculates the A-value for a hydrogen transition.

Parameters

nu : int
upper principal quantum number
lu : int
upper angular momentumn quantum number
nl : int
lower principal quantum number
ll : int
lower angular momentumn quantum number

Returns

float
transition probability (/s)

Notes

Multiple result by (z+1)**4 for the H-like sequence A-value.

Version History

  • Martin O'Mullane, 03-04-2019
    • First version

Example

The A-value for the neutral hydrogen transition: (n=8,l=6) to (n=6,l=5)

>>> import adas as adas
>>> adas.r8ah(8, 6, 6, 5)
217675.4666087866