Low-lying states of ^92,93Nb excited in the reactions induced by the weakly-bound nucleus ⁶Li near the Coulomb barrier *

Abstract

Excited states of odd-odd nucleus 92Nb and odd-A nucleus 93Nb were populated in the 6Li+ 89Y reaction with an incident energy of 34 MeV. The processes that produce 92,93Nb and can be measured by a combination of light charged particle and gamma ray measurements are discussed. Twenty new transitions are observed and eight new levels are constructed in 92Nb, and in addition two new transitions are added to the level scheme of 93Nb. Using shell model calculations, the low-lying structure of 92Nb is investigated and compared with the experimental results.

Prediction of the 1st excitation energy of odd–odd nuclei with the Bayesian neural network approach

“…Despite the challenges to measure unstable nuclei, the available experimental data constructs a dataset of more than 2000 nuclei, and continues to grow via recent experiments, e.g. [12,13]. Such a dataset can be used to train machine learning models, and test their predictive power.…”

Multi-quasiparticle excitations and the impact of the high-j intruder orbital in the N = 51 93Mo nucleus *

“…The level structures of nuclei near the Z = 38 semimagic and N = 50 magic shells have been the focus of experimental and theoretical research in recent years [1][2][3][4][5][6][7][8][9]. A number of interesting phenomena, such as single-particle excitation [3][4][5][6][7][8], isomeric states [8][9][10][11][12], collective rotation [13,14], and core breaking [15][16][17][18], have been reported in this mass region. The level structures of Zr, Nb, and Tc isotones around have been extended to higher spins and are well described by the shell model [16][17][18][19].…”