Figure 1

(Color online) (a) Particle identification spectrum and (b) fragment-β correlated particle identification spectrum.Reuse & Permissions

Figure 2

β-delayed γ-ray spectrum from the decay of ${}^{57}\mathrm{Ti}$ in the ranges (a) 0–0.4 MeV and (b) 0.4–2.5 MeV for events occurring within 1 s of an implanted ${}^{57}\mathrm{Ti}$ ion. The filled circles indicate peaks corresponding to transitions previously assigned to the daughter ${}^{57}\mathrm{V}$ decay.Reuse & Permissions

Figure 3

Decay curve for ${}^{57}\mathrm{Ti}$ showing fragment-β correlations (a) in which the data were fit with an exponential parent decay, an exponential growth, and decay for the daughter ${}^{57}\mathrm{V}$ and a linear background. Decay curves with an additional requirement of a coincident γ ray with energies of (b) 175 keV, (c) 1579 keV, and (d) 1861 keV were fitted with an exponential decay and linear background.Reuse & Permissions

Figure 4

Proposed ${}^{57}\mathrm{V}$ level scheme populated following the decay of ${}^{57}\mathrm{Ti}$. The number in brackets following a γ-ray transition energy is the absolute γ-ray intensity. The Q value was deduced from data in Ref. 24. Observed coincidences are represented as filled circles. Absolute β-decay intensities and apparent log ft values to each state in ${}^{57}\mathrm{V}$ are given on the left-hand side of the figure.Reuse & Permissions

Figure 5

$\gamma \gamma$ coincidence spectra for the (a) 1579-, (b) 1861-, (c) 1732-, and (d) 1923-keV transitions following ${}^{57}\mathrm{Ti}$ β-decay.Reuse & Permissions

Figure 6

${}^{59}\mathrm{V}$ β-delayed γ rays in the ranges (a) 0–1.5 MeV and (b) 1.5–3.0 MeV for events that occurred within 1 s of a ${}^{59}\mathrm{V}$ implanted ion. The filled and open circles indicate peaks corresponding to transitions previously assigned to the daughter ${}^{59}\mathrm{Cr}$ and granddaughter ${}^{59}\mathrm{Mn}$ decays, respectively.Reuse & Permissions

Figure 7

Decay curves for ${}^{59}\mathrm{V}$ showing fragment-β correlations with an additional requirement of a coincident γ ray with an energy of (a) 102 keV and (b) 208 keV. The decay curves were fitted with an exponential function with linear background.Reuse & Permissions

Figure 8

Proposed ${}^{59}\mathrm{Cr}$ level scheme populated following the decay of ${}^{59}\mathrm{V}$. The number in brackets following a γ-ray transition energy is the absolute γ-ray intensity. The Q value was deduced from data in Ref. 24. Observed coincidences are represented as filled circles.Reuse & Permissions

Figure 9

$\gamma \gamma$ coincidence spectra following ${}^{59}\mathrm{V}$ β decay for the (a) 102-, (b) 208-, (c) 317-, (d) 426-, (e) 592-, and (f) 708-keV transitions.Reuse & Permissions

Figure 10

(a) Decay curve showing fragment-β correlations in the decay of ${}^{59}\mathrm{V}$ with an additional requirement of a coincident γ ray with an energy of 1238 keV. The function used to fit the decay curve data included the exponential growth and decay of the daughter ${}^{59}\mathrm{Cr}$ with a linear background. The half-life for the parent ${}^{59}\mathrm{V}$ was fixed at 97 ms. The $\beta \gamma$ correlation time was extended to 5 s for these data to fully account for the longer half-life of the ${}^{59}\mathrm{Cr}$ daughter. (b) Decay curve showing fragment-β correlations for events occurring within 1 s after a ${}^{59}\mathrm{V}$ implanted ion. The decay curve was fitted with an exponential decay of the parent, growth, and decay of the daughter and granddaughter and a linear background term. The half-life of the daughter ${}^{59}\mathrm{Cr}$ was fixed at 1050 ms.Reuse & Permissions

Figure 11

Proposed ${}^{59}\mathrm{Mn}$ level scheme from the decay of ${}^{59}\mathrm{Cr}$. The number in brackets following a γ-ray transition energy is the relative γ-ray intensity. The Q value was deduced from data in Ref. 24. Observed coincidences are represented as filled circles.Reuse & Permissions

Figure 12

$\gamma \gamma$ coincidence spectra for the (a) 662- and (b) 1238-keV transitions assigned to the decay of ${}^{59}\mathrm{Cr}$. The 1238- and 662-keV transitions were observed in mutual coincidence. A coincidence between the 1238- and 112-keV transitions, if present, should be observable in the 1238-keV gated spectrum based on the intensity of the 662-keV peak. Intensities were too weak to determine coincidences between 662- and either of the 112- or 1126-keV transitions.Reuse & Permissions

Figure 13

The experimental decay scheme for levels in ${}^{57}\mathrm{V}$ populated following the β-decay of ${}^{57}\mathrm{Ti}$ and shell-model results carried out in the full pf space with the interaction GXPF1. The shell-model results assume a ${}^{57}\mathrm{Ti}$ ground state with a spin and parity of 5/2${}^{-}$.Reuse & Permissions