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Refined topology of the N = 20 island of inversion with high precision mass measurements of $^{31-33}$Na and $^{31-35}$Mg

Fuente: arXiv

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Détails bibliographiques
Auteurs principaux:	Lykiardopoulou, E. M., Walls, C., Bergmann, J., Brodeur, M., Brown, C., Cardona, J., Czihaly, A., Dickel, T., Duguet, T., Ebran, J. -P., Frosini, M., Hockenbery, Z., Holt, J. D., Jacobs, A., Kakkar, S., Kootte, B., Miyagi, T., Mollaebrahimi, A., Murboeck, T., Navratil, P., Otsuka, T., Plaß, W. R., Paul, S., Porter, W. S., Reiter, M. P., Scalesi, A., Scheidenberger, C., Somà, V., Shimizu, N., Wang, Y., Lunney, D., Dilling, J., Kwiatkowski, A. A.
Format:	Preprint
Publié:	2025
Sujets:	Nuclear Experiment
Accès en ligne:	Acceder al recurso
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_version_	1866910858557259776
author	Lykiardopoulou, E. M. Walls, C. Bergmann, J. Brodeur, M. Brown, C. Cardona, J. Czihaly, A. Dickel, T. Duguet, T. Ebran, J. -P. Frosini, M. Hockenbery, Z. Holt, J. D. Jacobs, A. Kakkar, S. Kootte, B. Miyagi, T. Mollaebrahimi, A. Murboeck, T. Navratil, P. Otsuka, T. Plaß, W. R. Paul, S. Porter, W. S. Reiter, M. P. Scalesi, A. Scheidenberger, C. Somà, V. Shimizu, N. Wang, Y. Lunney, D. Dilling, J. Kwiatkowski, A. A.
author_facet	Lykiardopoulou, E. M. Walls, C. Bergmann, J. Brodeur, M. Brown, C. Cardona, J. Czihaly, A. Dickel, T. Duguet, T. Ebran, J. -P. Frosini, M. Hockenbery, Z. Holt, J. D. Jacobs, A. Kakkar, S. Kootte, B. Miyagi, T. Mollaebrahimi, A. Murboeck, T. Navratil, P. Otsuka, T. Plaß, W. R. Paul, S. Porter, W. S. Reiter, M. P. Scalesi, A. Scheidenberger, C. Somà, V. Shimizu, N. Wang, Y. Lunney, D. Dilling, J. Kwiatkowski, A. A.
contents	Mass measurements of $^{31-33}$Na and $^{31-35}$Mg using the TITAN MR-TOF-MS at TRIUMF's ISAC facility are presented, with the uncertainty of the $^{33}$Na mass reduced by over two orders of magnitude. The excellent performance of the MR-TOF-MS has also allowed the discovery of a millisecond isomer in $^{32}$Na. The precision obtained shows that the binding energy of the normally closed N = 20 neutron shell reaches a minimum for $^{32}$Mg but increases significantly for $^{31}$Na, hinting at the possibility of enhanced shell strength toward the unbound $^{28}$O. We compare the results with new ab initio predictions that raise intriguing questions of nuclear structure beyond the dripline.
format	Preprint
id	arxiv_https___arxiv_org_abs_2502_06720
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Refined topology of the N = 20 island of inversion with high precision mass measurements of $^{31-33}$Na and $^{31-35}$Mg Lykiardopoulou, E. M. Walls, C. Bergmann, J. Brodeur, M. Brown, C. Cardona, J. Czihaly, A. Dickel, T. Duguet, T. Ebran, J. -P. Frosini, M. Hockenbery, Z. Holt, J. D. Jacobs, A. Kakkar, S. Kootte, B. Miyagi, T. Mollaebrahimi, A. Murboeck, T. Navratil, P. Otsuka, T. Plaß, W. R. Paul, S. Porter, W. S. Reiter, M. P. Scalesi, A. Scheidenberger, C. Somà, V. Shimizu, N. Wang, Y. Lunney, D. Dilling, J. Kwiatkowski, A. A. Nuclear Experiment Mass measurements of $^{31-33}$Na and $^{31-35}$Mg using the TITAN MR-TOF-MS at TRIUMF's ISAC facility are presented, with the uncertainty of the $^{33}$Na mass reduced by over two orders of magnitude. The excellent performance of the MR-TOF-MS has also allowed the discovery of a millisecond isomer in $^{32}$Na. The precision obtained shows that the binding energy of the normally closed N = 20 neutron shell reaches a minimum for $^{32}$Mg but increases significantly for $^{31}$Na, hinting at the possibility of enhanced shell strength toward the unbound $^{28}$O. We compare the results with new ab initio predictions that raise intriguing questions of nuclear structure beyond the dripline.
title	Refined topology of the N = 20 island of inversion with high precision mass measurements of $^{31-33}$Na and $^{31-35}$Mg
topic	Nuclear Experiment
url	https://arxiv.org/abs/2502.06720