The level structure of 30 S was studied via the 28 Si( 3 He,n) and 32 S(p,t) reactions at the Nuclear Science Laboratory (NSL) of the University of Notre Dame and the Research Center for Nuclear Physics (RCNP) of the University of Osaka, Japan. Important experimental information on the energy levels, decay branching ratios and tentative spin assignments are extracted to calculate the reaction rates for 29 P(p,γ) 30 S and 26 Si(α,p) 29 P, which play a critical role for reaction flow in explosive hydrogen burning.

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The 30 S(α,p) 33 Cl reaction has been identified in several Type-1 X-ray Bursts (XRB) sensitivity studies as a significant reaction within the αp-process, possibly influencing not only the abundances of burst ashes but also the bolometric shape of double-peaked light curves coming from certain XRB systems. Given the dearth of experimental data on the 30 S(α,p) 33 Cl reaction at burst temperatures, we have performed high energy-resolution forward-angle 36 Ar(p,t) 34 Ar measurements in order to identify levels in 34 Ar that could appear as resonances in the 30 S(α,p) 33 Cl reaction. Energies of levels identified in this work, along with model-based assumptions for spin assingments and spectroscopic factors, were then used to determine a rate for the 30 S(α,p) 33 Cl reaction based on a narrow-resonance formalism. The rates determined in this work are then compared with two standard Hauser-Feshbach model prediction over a range of XRB temperatures.

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The degrees of polarization of proton rich nucleus 28 P produced in charge exchange reactions 28 Si + 9 Be → 28 P + X, and 28 Si + 1 H → 28 P + X have been observed at 100A MeV. Utilizing thus obtained polarized nuclei, the magnetic moment of 28 P was remeasured, and |μ( 28 P)| = 0.3115 (34) μ N was obtained. β-nuclear quadrupole resonance (β-NQR) of 28 P implanted in α-Al 2 O 3 have been observed for the first time, in order to measure the electric quadrupole moment of this nucleus.