449 one finds that for y = Fo (e) C=: n; V3 [Po (2'Yj) 3 -kjF(i) ]
(2'Yj)! Fd (2'Yj) 3 -ijF (-m, } 1 ( 14.17) C2 =: n; [ - (2'Yj)! Fd
(2'Yj) 3 -ijF(i) ] Fo (2'Yj) 3 -;r(i)J, and if y is to be Go(e), C and
Chave the same form with Go (2'Yj) replacing Po (2'Yj) 1 2 and G (2'Yj)
replacing Fd(2'Yj). The values of the functions at eo =2'Yj may be ob-
tained from (14.8). 1 J. K. TYSON has employed the modified Hankel
functions of order one- third 2 as solutions of (13.4) to obtain
expressions for the Coulomb functions for L =0 which converge near e
=2'Yj. His results appear as linear combinations of the real and
imaginary parts of n (x) = (12)!e-;/6 [A;{- x) - iB;(-x)J, (14.18) and
its derivatives multiplying power series in x = (e - 2'Yj)j(2'Yj)1. For
values 1 away from the turning point for L =0, TYSON has obtained forms
for Po{e) and Go(e) which are similar to (13.1) to (13.3). The JWKB
approximation is again the leading term, and some higher order
corrections are given. Expressions similar to Eqs. (14.11) and (14.12)
have been obtained by T.D. 3 NEWTON employing the integral
representation of (4.4). His results give re- presentations of FL(e),
Gde) in the vicinity of e=2'Yj [whereas (14.11), (14.12) converge near
e=eLJ when L