Dipole excitations in 48Ti studied by nuclear resonance fluorescence

Supernova Inelastic Neutrino-Nucleus Cross Sections from High-Resolution Electron Scattering Experiments and Shell-Model Calculations

“…It should be noted that, where data are available [23,24] good agreement with nuclear resonance fluorescence experiments is observed for the prominent M 1 transitions. This is also the case for other pf -shell nuclei [25,26]. For all nuclei, the energy dependence of the observed M 1 strength distribution is well reproduced.…”

Low-lying dipole modes in vibrational nuclei studied by photon scattering

“…However, in contrast to the nuclei near Z = 50, where the strengths vary only smoothly as a function of the neutron number N within one isotopic chain, a steep decrease of the strengths is observed in Ba and Xe isotopes when moving away from the closed shell N = 82. In the investigated Xe isotopes, the two-phonon excitations were observed only in 128,130,132,134 Xe. For 124,126 Xe, the experimental sensitivity obviously was not sufficient.…”

“…In particular, the unusually long Xe isotopic chain with seven stable, even-even nuclei offers a unique possibility of studying low-lying modes, like the two-phonon excitations, in nuclei undergoing a phase or shape transition. It should be emphasized that the measurements on 124,126,128,130,132,134,136 Xe represented an experimental challenge since for the first time highpressure gas targets [61] of highly enriched target material were utilized in NRF experiments.…”

α clustering and its connection to the E1 response of heavy nuclei

“…The experimental data have been taken from Refs. [7,14,15,16]. Firm spin-parity assignments in black, while ambiguous assignments are presented in red.…”

“…Furthermore, the vibrational nucleus 94 Mo has been the prime laboratory for so-called mixedsymmetry states for decades, see, e.g., the review [12], and an α + (A − 4) structure has already been discussed [13]. For all these nuclei extended information on the E1 response up to the particle-emission thresholds is available [7,14,15,16]. The comparison of the experimental data and the IBM predictions for the B(E1) strength is shown in Fig.…”