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Direct transfer to $^{46,48}$K as a survey of the $π(s_{1/2})$$-ν(sdpf)$ interaction

Fuente: arXiv

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Autori principali:	Paxman, C. J., Matta, A., Catford, W. N., Lotay, G., Assié, M., Clément, E., Lemasson, A., Ramos, D., Orr, N. A., Galtarossa, F., Girard-Alcindor, V., Dudouet, J., Achouri, N. L., Ackermann, D., Barrientos, D., Beaumel, D., Bednarczyk, P., Benzoni, G., Bracco, A., Canete, L., Cederwall, B., Ciemala, M., Delahaye, P., Doherty, D. T., Domingo-Pardo, C., Fernández-Domínguez, B., Fernández, D., Flavigny, F., Fougères, C., de France, G., Franchoo, S., Gadea, A., Gibelin, J., González, V., Gottardo, A., Goyal, N., Hammache, F., Harkness-Brennan, L. J., Harrouz, D. S., Jacquot, B., Judson, D. S., Jungclaus, A., Kaşkaş, A., Korten, W., Labiche, M., Lalanne, L., Lenain, C., Leoni, S., Ljungvall, J., Lois-Fuentes, J., Lokotko, T., Lopez-Martens, A., Maj, A., Marqués, F. M., Martel, I., Menegazzo, R., Mengoni, D., Million, B., Nyberg, J., Pérez-Vidal, R. M., Plagnol, L., Podolyák, Zs., Pullia, A., Quintana, B., Regueira-Castro, D., Reiter, P., Rejmund, M., Rezynkina, K., Sanchis, E., Şenyiğit, M., de Séréville, N., Siciliano, M., Sohler, D., Stezowski, O., Thomas, J. -C., Utepov, A., Valiente-Dobón, J. J., Verney, D., Zielińska, M.
Natura:	Preprint
Pubblicazione:	2026
Soggetti:	Nuclear Experiment Nuclear Theory
Accesso online:	Acceder al recurso
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_version_	1866912814195539968
author	Paxman, C. J. Matta, A. Catford, W. N. Lotay, G. Assié, M. Clément, E. Lemasson, A. Ramos, D. Orr, N. A. Galtarossa, F. Girard-Alcindor, V. Dudouet, J. Achouri, N. L. Ackermann, D. Barrientos, D. Beaumel, D. Bednarczyk, P. Benzoni, G. Bracco, A. Canete, L. Cederwall, B. Ciemala, M. Delahaye, P. Doherty, D. T. Domingo-Pardo, C. Fernández-Domínguez, B. Fernández, D. Flavigny, F. Fougères, C. de France, G. Franchoo, S. Gadea, A. Gibelin, J. González, V. Gottardo, A. Goyal, N. Hammache, F. Harkness-Brennan, L. J. Harrouz, D. S. Jacquot, B. Judson, D. S. Jungclaus, A. Kaşkaş, A. Korten, W. Labiche, M. Lalanne, L. Lenain, C. Leoni, S. Ljungvall, J. Lois-Fuentes, J. Lokotko, T. Lopez-Martens, A. Maj, A. Marqués, F. M. Martel, I. Menegazzo, R. Mengoni, D. Million, B. Nyberg, J. Pérez-Vidal, R. M. Plagnol, L. Podolyák, Zs. Pullia, A. Quintana, B. Regueira-Castro, D. Reiter, P. Rejmund, M. Rezynkina, K. Sanchis, E. Şenyiğit, M. de Séréville, N. Siciliano, M. Sohler, D. Stezowski, O. Thomas, J. -C. Utepov, A. Valiente-Dobón, J. J. Verney, D. Zielińska, M.
author_facet	Paxman, C. J. Matta, A. Catford, W. N. Lotay, G. Assié, M. Clément, E. Lemasson, A. Ramos, D. Orr, N. A. Galtarossa, F. Girard-Alcindor, V. Dudouet, J. Achouri, N. L. Ackermann, D. Barrientos, D. Beaumel, D. Bednarczyk, P. Benzoni, G. Bracco, A. Canete, L. Cederwall, B. Ciemala, M. Delahaye, P. Doherty, D. T. Domingo-Pardo, C. Fernández-Domínguez, B. Fernández, D. Flavigny, F. Fougères, C. de France, G. Franchoo, S. Gadea, A. Gibelin, J. González, V. Gottardo, A. Goyal, N. Hammache, F. Harkness-Brennan, L. J. Harrouz, D. S. Jacquot, B. Judson, D. S. Jungclaus, A. Kaşkaş, A. Korten, W. Labiche, M. Lalanne, L. Lenain, C. Leoni, S. Ljungvall, J. Lois-Fuentes, J. Lokotko, T. Lopez-Martens, A. Maj, A. Marqués, F. M. Martel, I. Menegazzo, R. Mengoni, D. Million, B. Nyberg, J. Pérez-Vidal, R. M. Plagnol, L. Podolyák, Zs. Pullia, A. Quintana, B. Regueira-Castro, D. Reiter, P. Rejmund, M. Rezynkina, K. Sanchis, E. Şenyiğit, M. de Séréville, N. Siciliano, M. Sohler, D. Stezowski, O. Thomas, J. -C. Utepov, A. Valiente-Dobón, J. J. Verney, D. Zielińska, M.
contents	The collapse of the canonical $N=28$ magic number in nuclei with $Z<20$ has drawn significant interest as it relates to the emergence of an island of inversion centered on $^{42}$Si and $^{44}$S. In particular, interactions between the $πs_{1/2}$ orbital -- empty in $^{42}$Si and full in $^{44}$S -- and the neutron orbitals just above and below the $N=28$ gap are expected to be critical in this region, but remain relatively unexplored. In this paper, we expand upon the results of our previous study of the direct transfer reaction $^{47}$K(d,p$γ$)$^{48}$K [C.\,J.~Paxman \textit{et al.}, Phys. Rev. Lett. 134, 162504 (2025)] with the results of the complementary $^{47}$K(d,t$γ$)$^{46}$K reaction. Through this study, we present a comprehensive scan of the interaction between the critical $πs_{1/2}$ orbital and a broad range of neutron orbitals spanning nearly two full shells. We identify several discrepancies between the experimental results and state-of-the-art shell model calculations, which suggest a deficiency of the shell model to fully capture the complex proton configuration mixing in this region, highlighting a significant challenge for single-particle descriptions of the island of inversion.
format	Preprint
id	arxiv_https___arxiv_org_abs_2601_06242
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Direct transfer to $^{46,48}$K as a survey of the $π(s_{1/2})$$-ν(sdpf)$ interaction Paxman, C. J. Matta, A. Catford, W. N. Lotay, G. Assié, M. Clément, E. Lemasson, A. Ramos, D. Orr, N. A. Galtarossa, F. Girard-Alcindor, V. Dudouet, J. Achouri, N. L. Ackermann, D. Barrientos, D. Beaumel, D. Bednarczyk, P. Benzoni, G. Bracco, A. Canete, L. Cederwall, B. Ciemala, M. Delahaye, P. Doherty, D. T. Domingo-Pardo, C. Fernández-Domínguez, B. Fernández, D. Flavigny, F. Fougères, C. de France, G. Franchoo, S. Gadea, A. Gibelin, J. González, V. Gottardo, A. Goyal, N. Hammache, F. Harkness-Brennan, L. J. Harrouz, D. S. Jacquot, B. Judson, D. S. Jungclaus, A. Kaşkaş, A. Korten, W. Labiche, M. Lalanne, L. Lenain, C. Leoni, S. Ljungvall, J. Lois-Fuentes, J. Lokotko, T. Lopez-Martens, A. Maj, A. Marqués, F. M. Martel, I. Menegazzo, R. Mengoni, D. Million, B. Nyberg, J. Pérez-Vidal, R. M. Plagnol, L. Podolyák, Zs. Pullia, A. Quintana, B. Regueira-Castro, D. Reiter, P. Rejmund, M. Rezynkina, K. Sanchis, E. Şenyiğit, M. de Séréville, N. Siciliano, M. Sohler, D. Stezowski, O. Thomas, J. -C. Utepov, A. Valiente-Dobón, J. J. Verney, D. Zielińska, M. Nuclear Experiment Nuclear Theory The collapse of the canonical $N=28$ magic number in nuclei with $Z<20$ has drawn significant interest as it relates to the emergence of an island of inversion centered on $^{42}$Si and $^{44}$S. In particular, interactions between the $πs_{1/2}$ orbital -- empty in $^{42}$Si and full in $^{44}$S -- and the neutron orbitals just above and below the $N=28$ gap are expected to be critical in this region, but remain relatively unexplored. In this paper, we expand upon the results of our previous study of the direct transfer reaction $^{47}$K(d,p$γ$)$^{48}$K [C.\,J.~Paxman \textit{et al.}, Phys. Rev. Lett. 134, 162504 (2025)] with the results of the complementary $^{47}$K(d,t$γ$)$^{46}$K reaction. Through this study, we present a comprehensive scan of the interaction between the critical $πs_{1/2}$ orbital and a broad range of neutron orbitals spanning nearly two full shells. We identify several discrepancies between the experimental results and state-of-the-art shell model calculations, which suggest a deficiency of the shell model to fully capture the complex proton configuration mixing in this region, highlighting a significant challenge for single-particle descriptions of the island of inversion.
title	Direct transfer to $^{46,48}$K as a survey of the $π(s_{1/2})$$-ν(sdpf)$ interaction
topic	Nuclear Experiment Nuclear Theory
url	https://arxiv.org/abs/2601.06242