V. Derya
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View article: Investigation of the γ-decay behavior of ⁵²Cr with the γ³ setup at HIγS
Investigation of the γ-decay behavior of ⁵²Cr with the γ³ setup at HIγS Open
The γ-ray strength function is an important input parameter for the calculation of nucleosynthesis processes. To study the dipole response in more detail, the γ-decay behavior of the fp shell nucleus ⁵²Cr was investigated with the high-eff…
View article: Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce
Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce Open
We report on the first (p, p'gamma) experiments at E-p = 80 MeV to investigate the Pygmy Dipole Resonance (PDR) in the semi-magic nucleus Ce-140. This experiment is the latest in a series of experiments to investigate the PDR with differen…
View article: Shape mixing in 0<i>νββ</i> candidates
Shape mixing in 0<i>νββ</i> candidates Open
Weak processes are typically observed through nuclear effects, as they mediate between different eigenstates of either one nucleus, or a pair of nuclei. Since the derivation of important parameters of the weak interaction and weakly-intera…
View article: Probing the <i>E2</i> properties of the scissors mode with real photons
Probing the <i>E2</i> properties of the scissors mode with real photons Open
The E2/M1 multipole mixing ratio δ 1→2 of the 1 + sc → 2 + 1 γ -ray transition of 156 Gd and 164 Dy has been measured using the linearly polarized photon beams of the HI γ S facility. The employed method of photonscattering experiments in …
View article: Observation of isoscalar and isovector dipole excitations in neutron-rich 20 O
Observation of isoscalar and isovector dipole excitations in neutron-rich 20 O Open
The isospin characters of low-energy dipole excitations in neutron-rich unstable nucleus O-20 were investigated, for the first time in unstable nuclei. Two spectra obtained from a dominant isovector probe (O-20 + Au) and a dominant isoscal…
View article: Nuclear astrophysics with radioactive ions at FAIR
Nuclear astrophysics with radioactive ions at FAIR Open
The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and …
View article: The pygmy quadrupole resonance and neutron-skin modes in 124 Sn
The pygmy quadrupole resonance and neutron-skin modes in 124 Sn Open
We present an extensive experimental study of the recently predicted pygmy quadrupole resonance (PQR) in Sn isotopes, where complementary probes were used. In this study, (alpha,alpha 'gamma) and (gamma,gamma ') experiments were performed …
View article: Study of mixed-symmetry excitations in <sup>96</sup>Ru via inelastic proton-scattering
Study of mixed-symmetry excitations in <sup>96</sup>Ru via inelastic proton-scattering Open
Mixed-symmetry states of octupole (L = 3) and hexadecapole (L = 4) character have been recently proposed in the N = 52 isotones Zr-92 and Mo-94, based on strong M1 transitions to the lowest-lying 3(-) and 4(+) states, respectively. In orde…
View article: The Pygmy Dipole Resonance – status and new developments
The Pygmy Dipole Resonance – status and new developments Open
At energies well below the isovector electric Giant Dipole Resonance, a concentration of electric dipole strength is observed in many stable and radioactive nuclei. This low-lying excitation mode is usually denoted as Pygmy Dipole Resonanc…
View article: Mixed-symmetry octupole and hexadecapole excitations in<i>N=52</i>isotones
Mixed-symmetry octupole and hexadecapole excitations in<i>N=52</i>isotones Open
In addition to the well-established quadrupole mixed-symmetry states, octupole and hexadecapole excitations with mixed-symmetry character have been recently proposed for the N = 52 isotones 92Zr and 94Mo. We performed two inelastic proton-…
View article: Decay pattern of the Pygmy Dipole Resonance in<sup>140</sup>Ce
Decay pattern of the Pygmy Dipole Resonance in<sup>140</sup>Ce Open
The decay behavior of low-lying dipole states in 140Ce was investigated exploiting the γ3-setup at the HIγS facility using quasi-monochromatic photon beams. Branching ratios of individual excited states as well as average branching ratios …
View article: Study of the isospin character of 1<sup>-</sup>states using hadronic probes at intermediate energies
Study of the isospin character of 1<sup>-</sup>states using hadronic probes at intermediate energies Open
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