Discrete gamma rays were detected in coincidence with light charged fragments produced in the 48Ti + 16O reaction at 120 MeV. Results for the (16O, 12C) reaction are presented and compared to the data from the α + 48Ti fusion reaction within similar excitation energy range.

Résumé. 2014 Nous avons étudié le noyau 70Ga par la réaction 68Zn(03B1, pn03B3)70Ga à E03B1 = 23-40 MeV au moyen de fonctions d’excitations, de mesures électroniques de durée de vie, de coïncidences promptes et retardées et de distributions angulaires des raies 03B3 émises. Nous avons identifié des niveaux de spin J03C0 ~ 9+ jusqu’à 2,9 MeV d’excitation, et précisé ainsi la composante sur la couche (03BDlg9/2) des niveaux yrast du 70Ga. Abstract. 2014 The 70Ga nucleus has been investigated via the 68Zn(03B1, pn03B3)70Ga reaction at E03B1 = 23-40 MeV. The level scheme has been established by means of relative yield functions, electronic timing measurements, prompt and delayed coincidences and angular distributions of the emitted 03B3 rays. The assignations of spins up to 9+ to levels up to 2.9 MeV excitation energy specify the components of the (03BDlg9/2) subshell.

The 62Cu nucleus has been studied via the reactions 60Ni(α, pny), 63Cu(p, pnγ), 52Cr(14N, 2p2nγ) using different in-beam γ-spectroscopy techniques. The intensity of principal γ-lines observed in different reactions leading to the 62Cu has been compared. A brief discussion is made in terms of the independent particle model. A level scheme including levels with spin up to 9+ is proposed.

The nucleus 50V has been studied via the 48Ti(α, pnγ)50V reaction at Eα≈ 30 MeV using different in-beam γ-spectroscopic techniques. High-spin levels up to 4.3 MeV have been identified and spins up to 11+ have been established. The lifetime measurements and level scheme are compared with (f72)10 shell-model calculations.

2014 Un schéma de niveaux a été obtenu pour le noyau 64Zn, en spectroscopie 03B3 sur faisceau, par l'étude de la réaction 62Ni(03B1, 2n03B3).Les caractéristiques J03C0 = 6+ et 7(-) sont proposées pour les niveaux à 4 236 keV et 4 635 keV respectivement.La vie moyenne (03C4 = 130 ± 15 ps) de la transi- tion E03B3 = 641 keV désexcitant le niveau à 4 635 keV a été mesurée par la méthode du parcours de recul dans la réaction 55Mn(12C, p 2n03B3).

The68Ga nucleus has been studied via the reactions65Cu(α, nγ)68Ga atE α=12–21 MeV and66Zn(α, p nγ)68Ga atE α=25–40 MeV. The level scheme has been established by means of relative yield functions, electronic timing measurements, prompt and delayedγ-γ coincidences, angular distributions and directional orientation coÏncidences. Spins up to 11+ were assigned to levels up to 4 MeV excitation and the higher ones were interpreted by coupling a67Ga core with a (v 1 g9/2) neutron.

The nucleus /sup 70/Ge has been studied via the /sup 68/Zn(..cap alpha.., 2n..gamma..)/sup 70/Ge reaction at E/sub alpha/approx. =30 MeV using different in-beam ..gamma.. spectroscopic techniques. Levels up to 5.5 MeV have been identified and spins up to 8/sup +/ have been established. (AIP)

The nucleus $^{70}\mathrm{Ge}$ has been studied via the $^{68}\mathrm{Zn}(\ensuremath{\alpha},2n\ensuremath{\gamma})^{70}\mathrm{Ge}$ reaction at ${E}_{\ensuremath{\alpha}}\ensuremath{\simeq}30$ MeV using different in-beam $\ensuremath{\gamma}$ spectroscopic techniques. Levels up to 5.5 MeV have been identified and spins up to ${8}^{+}$ have been established.

The decay scheme of62Zn has been investigated by studying the yield functions, angular distributions and coincidence relation-ships of theγ-rays emitted in the63Cu(p, 2nγ) and60Ni(α, 2nγ) reactions. Spins up to7ħ were assigned to the observed states.

The 390 keV isomeric state of 62Cu is assigned as Jπ = 4+. The magnetic hyperfine interaction has been observed in the 60Ni(α, pnγ) 62Cu reaction and the deduced Larmor period is consistent with known values of g and the hyperfine field of Cu in Ni.

Yrast levels of $^{68}\mathrm{Zn}$ have been investigated via measurements of excitation functions and angular distributions of single $\ensuremath{\gamma}$ rays and of $\ensuremath{\gamma}$-$\ensuremath{\gamma}$ coincidences following the $^{65}\mathrm{Cu}(\ensuremath{\alpha},p\ensuremath{\gamma})^{68}\mathrm{Zn}$ reaction with $\ensuremath{\alpha}$ particle energies between 12-21 MeV. Spins up to $8\ensuremath{\hbar}$ were assigned to observed states.NUCLEAR REACTIONS $^{65}\mathrm{Cu}(\ensuremath{\alpha},p\ensuremath{\gamma})$, ${E}_{\ensuremath{\alpha}}=12\ensuremath{-}21$ MeV; measured $\ensuremath{\gamma}$, $\ensuremath{\gamma}$-$\ensuremath{\gamma}$, $\ensuremath{\sigma}({E}_{\ensuremath{\gamma}},{\ensuremath{\theta}}_{\ensuremath{\gamma}})$, deduced $^{68}\mathrm{Zn}$ decay scheme, $J$, $\ensuremath{\pi}$, and $\ensuremath{\gamma}$ mixing. Enriched target, Ge(Li) detectors.

We establish the existence of γ-lines feeding the 6− delayed state in 64Cu at 1593 keV with the reaction 62Ni(α,pnγ) using different in-beam γ-spectroscopy techniques. We compare also the intensity of principal γ-lines observed in different reactions leading to the 64Cu nucleus. A level scheme of 64Cu is proposed.