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This spreadsheet contains a user defned unction called Gammaax

Abramowitz and Stegun 6.5.2 gies the defnition

!ou can use it as a usual "xcel unction

#t has two parameters$ Gammaax%a&x'

The second parameter can be missing

"xamples$

()Gammaax%*&+'( ,-A/"0

()Gammaax%*'( ,-A/"0

1emar$ 3oth the aboe orms gie the usual Gamma unction& in this case the

4urther examples$

a

*.6

+.2

+.

#n recoer potential analsis we need the frst parameter to be (78n( and the sen) +.* and dimensionless rate ;< ) +.>

(Gammaax%78+.*&9 ln%+.>' '( ,-A/"0

(Gammaax%78+.* '( ,-A/"0

(The ratio o the two is the recoer potential rp $( ,-A/"0

[a , x ]=x

ta1

e

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lue is 2 actorial ) 2

x Gamma%a&x'

>.6 ,-A/"0

* ,-A/"0

+.2 ,-A/"0

ond parameter to be (9ln:;

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e