Multinucleon transfer reactions in closed-shell nuclei

Abstract

Multinucleon transfer reactions in 40Ca+96Zr and 90Zr+208Pb have been measured at energies close to the Coulomb barrier in a high-resolution γ-particle coincidence experiment. The large-solid-angle magnetic spectrometer PRISMA coupled to the CLARA γ array has been employed. Trajectory reconstruction has been applied for the complete identification of transfer products. Mass and charge yields, total kinetic energy losses, γ transitions of the binary reaction partners, and comparison of data with semiclassical calculations are reported. Specific transitions in 95Zr populated in one-particle transfer channels are discussed in terms of particle-phonon couplings. The γ decays from states in 42Ca in the excitation energy region expected from pairing vibrations are also observed

Lifetime measurements in neutron-rich63,65Co isotopes using the AGATA demonstrator

“…The lifetime of the 9/2 − state at 1383 keV was not measured either. This is due to the presence of a non-negligible feeding from states above, that was not possible to suppress in our case because of the low statistics, via a gate on the TKEL measured by PRISMA [23], as performed in Ref. [11].…”

High-spin structure ofXe134

“…Multinucleon transfer reactions populate excitation energies and spins differing substantially from the ones reached by fusion-evaporation reactions or fission residues [27,48]. The total excitation energy can be restricted by gating on the TKEL that was calculated in a similar way to that described in Section II A.…”

“…Thus, TKEL spectra are correlated with coincident γ rays of AGATA. By gating on different TKEL regions, γ-ray transitions between states with different excitation energies and angular momenta can be suppressed or enhanced [27,28]. Figure 6 shows γ-ray spectra for 134 Xe obtained with different conditions on the TKEL.…”

“…In this article, we report and discuss new results for the nucleus 134 Xe obtained in three different experiments which are based on direct identification of 134 Xe and coincident prompt γ-ray spectroscopy. The combination of the highresolution position-sensitive Advanced Gamma Tracking Array (AGATA) [25] and the PRISMA magnetic mass spectrometer [26][27][28] Pt MNT reaction using the GAMMASPHERE+CHICO setup [29,30] at LBNL. This paper is organized as follows: the experimental setup, data analysis, and the results of the three experiments are described in Section II.…”

Transition probabilities in neutron-rich Se80,82 and the role of the νg9/2Litzinger1, Blazhev2, Dewald3 et al. 2018Phys. Rev. CSelf Cite5000View full textAdd to dashboardCite

“…A 93 Nb degrader foil with a thickness of 4.1 mg/cm 2 was mounted downstream from the target. Projectile-like recoils were therefore slowed down before entering the PRISMA magnetic spectrometer [25][26][27][28] for the event-by-event particle 80 Se are not visible in the γ -ray spectra presented in this work and are included for comparison with 82 Se. Excitation energies and γ -ray energies are given in keV, taken from NNDC [23] and Ref.…”