Spins and parities of levels in 40Ca measured with the 39K(þ, γ)40Ca reaction

Gamma-gamma triple angular correlation measurements were performed at eight resonances, and polarization experiments at three resonances of the 39K(þ,γ)40Ca reaction in the proton energy range Ep = 1.1–2.1 MeV. Spins and parities could be determined of the following 40Ca levels (energies in MeV): 3.73 3-, 3.90 2+, 4.48 5-, 5.24 2, 5.27 4+, 5.61 4-, 6.28 3(-), 6.94 (1, 2), 7.29 0, 7.49 2, 9.41 2, 9.61 3+, 9.65 2-, 9.79 3, 9.87 1, 9.96 4+ and 10.33 1. In addition, a number of gamma-ray multipole mixing ratios in 40Ca were determined. A shell-model calculation has been made with the surface delta interaction to explain the odd-parity levels

Gamma decay of levels in 40Ca measured with the 39K(p, γ)40Ca reaction

In the proton-energy range Ep = 500–2900 ke V fifty-three resonances were observed in the 39K(p, γ)40Ca reaction. The resonance energies and strengths were determined. The decay modes of most of the resonances and of fifteen lower excited states in 40Ca were determined from single and coincidence gamma-ray spectra

An investigation of the odd-parity states of 40Ca with the Tabakin interaction and the MSDI

The realistic Tabakin nucleon-nucleon interaction, and the effective modified surface delta interaction (MSDI) are applied to determine the energy spectrum and wave functions of the low-lying odd-parity states in 40Ca. The calculations are performed in the TDA and the RPA. The wave functions are used to determine γ-transition rates and mean lifetimes