Energy levels of 37K

Angular distributions have been measured for six ³⁶Ar(p,γ)³⁷K resonances in the E_p = 0.9−3.0 MeV energy region. These experiments yield spin- and parity assignments to seven excited states of ³⁷K, γ-ray branching ratios for each state, together with the multipolarity mixing ratios of most transitions. Lifetimes have been deduced from the same data with the DSA method.Excitation energies have been determined with a precision up to 20 eV. A resonance- and excitation-energy measurement at the E_p = 918keV resonance yields a ³⁶Ar(p, γ)³⁷K Q-value of Q = 1857.57 ± 0.09 keV.The ³⁶Ar(p, p₁γ) yield curve, measured in the E_p = 2.6–3.3 MeV region, yields additional information on resonance and excitation energies of ³⁷K states with a typical precision of 0.6 keV.The new data on ³⁷K levels allow a detailed comparison of the level schemes of the mirror nuclei ³⁷Ar and ³⁷K. The present experimental data agree quite well with the results of previous shell-model calculations.