[en] The ⁴⁰Ca(⁴He,⁸He)³⁶Ca reaction has been used to provide the first observation of the nuclide ³⁶Ca. The Q value and mass excess were found to be -57.58 +- 0.04 and -6.44 +- 0.04 MeV, respectively. The new mass completes four members of the A = 36 isobaric quintet and hence serves as a test of the isobaric multiplet mass equation

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[en] Excitation functions of the ⁴⁰Ca(p,p₂γ) triple angular correlations have been measured in the region of an intermediate structure centered at Esub(p) = 6.25 MeV, for 12 pairs of proton and gamma positions. On the peaks of the main components of the intermediate structure the number of these combinations amounted to 32. The angular correlations measured in the Goldfarb-Seyler geometry are consistent with the spin 5/2 assigned for these resonances. An analysis of all the angular correlation data has established the psub(1/2) partial wave as the main decay mode of the intermediate structure in the 3^- inelastic channel. These results are strongly supporting the description of the structure observed in the 3^- exit channel as consisting of 2p-1h doorway states in which a 2psub(1/2) single-particle state weakly coupled to 3^- excited core is split by residual interactions. An improved dynamical treatment, aimed to obtain the strength function of the 2psub(1/2) single-particle state in the 3^- channel, is suggested. (author)

[en] The RPA modes are constructed using data associated with different kinds of renormalized one-particle Green functions as input. A general normalization condition is derived and the formalism applied to the ⁴⁰Ca nucleus. (orig.)

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[en] Energy levels and gamma radiation transitions of Ca⁴⁴ are experimentally determined, mainly the weak transition at 564 KeV and 728 KeV. The decay scheme and the method used (coincidence with Ge-Li detector) are also presented

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[en] An asymptotic restoration procedure is applied for analyzing bound-state overlap functions, separation energies, and single-nucleon spectroscopic factors by means of a model one-body density matrix emerging from the Jastrow correlation method in its lowest order approximation for ¹⁶O and ⁴⁰Ca nuclei. Comparison is made with available experimental data and mean-field and natural orbital representation results. copyright 1996 The American Physical Society