${}^{29, 30}{Si}$ ( ${}^{16}O$ , ${}^{15}N$ ) proton stripping reaction at 60 MeV

Differential cross sections of the [

{}^{16}O

{}^{15}N

(g.s.)] reaction on

{}^{29}{Si}

and

{}^{30}{Si}

were measured at

E ({}^{16}O) = 60

MeV at far forward angles. The strongly oscillatory

Δ L = 1

, (2) angular distributions for the

2 s_{\frac{1}{2}}

and

1 d_{\frac{3}{2}}

transitions to

{}^{30}P

and

{}^{31}P

were found to be out of phase. The pure

Δ L = 1

2 s_{\frac{1}{2}}

transitions were fitted well by finite range distorted wave Born approximation calculations using the code LOLA. The phase of the structure of the

1 d_{\frac{3}{2}}

transfer angular distributions could not be fitted with the distorted wave Born approximation. Spectroscopic factors were in good agreement with (

{}^{3}{He}, d

) results for

2 s_{\frac{1}{2}}

and

1 d_{\frac{5}{2}}

transitions and a factor of 2 too large for

1 d_{\frac{3}{2}}

transfer. This factor of 2 for the

1 d_{\frac{3}{2}}

transitions is not understood. The mixed

j

transition to the

2^{+}

state in

{}^{30}P

(1.454 MeV) was found to be consistent with almost exclusive

j = \frac{3}{2}

transfer as predicted by shell model calculations.

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Si29,30(O16,N15) proton stripping reaction at 60 MeV