Das Niveauschema von 47V aus dem γ-zerfall von Analogresonanzen

Abstract

A high-accuracy investigation of the level scheme of 47V has been performed using the 46Ti(p, γ) 47V reaction. The γ-decay schemes of the strong (p, γ) resonances at E p = 1546, 1549, 1565 and 1572 keV lead to 17 new energy levels in 47V with excitation energies between 2.7 and 5.1 MeV. From the (p,γ) angular distributions mixing ratios of the primary γ-transitions and J π values of the resonances and of many states populated in the γ-decay have been determined. The total width of the E p = 1549, 1565 and 1572 keV resonances for γ-decay are found to be Γ γ = 0.12, 0.15 and 0.03 eV, respectively. The Q-value of the 46Ti(p,γ) 47V reaction is found to be 5168.6 keV. The two resonances at E p = 1549 and 1565 keV, which have J π = 3 2 − , are interpreted as fine structure components of the analogue state of the E ∗ = 2.545 MeV J π = 3 2 − level in 47Ti while the ( 7 2 ) resonance at E p = 1546 keV might correspond to the E ∗ = 2.615 MeV 7 2 − parent state in 47Ti. The analogue-antianalogue M1 transition strength of the split 3 2 − analogue state is 0.01 single-particle units and fits well into our systematics of IAS → AIAS transitions in fp-shell nuclei.