Observation and spectroscopy of proton-unbound nucleus $^{21}$Al
Nuclear Experiment
2024-10-04 v1
Abstract
We report on the observation of previously-unknown isotope Al, the first unbound aluminum isotope located beyond the proton dripline. The Al nucleus decays by one-proton (1p) emission, and its in-flight decays were detected by tracking trajectories of all decay products with micro-strip silicon detectors. The 1p-emission processes were studied by analyses of the measured angular correlations of decay products Mg+p. The 1p-decay energies of ground and low-lying excited states of Al, its mass excess and proton separation energy value = MeV were determined.
Keywords
Cite
@article{arxiv.2406.04771,
title = {Observation and spectroscopy of proton-unbound nucleus $^{21}$Al},
author = {D. Kostyleva and X. -D. Xu and I. Mukha and L. Acosta and M. Bajzek and E. Casarejos and A. A. Ciemny and D. Cortina-Gil and W. Dominik and J. A. Dueñas and J. M. Espino and A. Estradé and F. Farinon and A. Fomichev and H. Geissel and J. Gómez-Camacho and A. Gorshkov and L. V. Grigorenko and Z. Janas and G. Kamiński and O. Kiselev and R. Knöbel and A. A. Korsheninnikov and S. Krupko and M. Kuich and N. Kurz and Yu. A. Litvinov and G. Marquinez-Durán and I. Martel and C. Mazzocchi and E. Yu. Nikolskii and C. Nociforo and A. K. Ordúz and M. Pfützner and S. Pietri and M. Pomorski and A. Prochazka and C. Rodríguez-Tajes and S. Rymzhanova and A. M. Sánchez-Benítez and C. Scheidenberger and H. Simon and B. Sitar and R. Slepnev and M. Stanoiu and P. Strmen and K. Sümmerer and I. Szarka and M. Takechi and Y. K. Tanaka and H. Weick and J. S. Winfield and P. J. Woods and M. V. Zhukov},
journal= {arXiv preprint arXiv:2406.04771},
year = {2024}
}
Comments
6 pages, 7 figures