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Coulomb Excitation of $^{80}$Sr and the limits of the $N = Z = 40$ island of deformation

Fuente: arXiv

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Bibliographic Details
Main Authors:	Russell, R., Heery, J., Henderson, J., Wadsworth, R., Kaneko, K., Shimizu, N., Mizusaki, T., Sun, Y., Andreoiu, C., Annen, D. W., Avaa, A. A., Ball, G. C., Bildstein, V., Buck, S., Cousins, C., Garnsworthy, A. B., Gillespie, S. A., Greaves, B., Grimes, A., Hackman, G., Hughes, R. O., Jenkins, D. G., Kowalewski, T. M., Martin, M. S., Müller-Gatermann, C., Murias, J. R., Murillo-Morales, S., Pascu, S., Rhodes, D. M., Smallcombe, J., Spagnoletti, P., Svensson, C. E., Wallis, B., Williams, J., Wu, C. Y., Yates, D.
Format:	Preprint
Published:	2024
Subjects:	Nuclear Experiment Nuclear Theory
Online Access:	Acceder al recurso
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_version_	1866909288671215616
author	Russell, R. Heery, J. Henderson, J. Wadsworth, R. Kaneko, K. Shimizu, N. Mizusaki, T. Sun, Y. Andreoiu, C. Annen, D. W. Avaa, A. A. Ball, G. C. Bildstein, V. Buck, S. Cousins, C. Garnsworthy, A. B. Gillespie, S. A. Greaves, B. Grimes, A. Hackman, G. Hughes, R. O. Jenkins, D. G. Kowalewski, T. M. Martin, M. S. Müller-Gatermann, C. Murias, J. R. Murillo-Morales, S. Pascu, S. Rhodes, D. M. Smallcombe, J. Spagnoletti, P. Svensson, C. E. Wallis, B. Williams, J. Wu, C. Y. Yates, D.
author_facet	Russell, R. Heery, J. Henderson, J. Wadsworth, R. Kaneko, K. Shimizu, N. Mizusaki, T. Sun, Y. Andreoiu, C. Annen, D. W. Avaa, A. A. Ball, G. C. Bildstein, V. Buck, S. Cousins, C. Garnsworthy, A. B. Gillespie, S. A. Greaves, B. Grimes, A. Hackman, G. Hughes, R. O. Jenkins, D. G. Kowalewski, T. M. Martin, M. S. Müller-Gatermann, C. Murias, J. R. Murillo-Morales, S. Pascu, S. Rhodes, D. M. Smallcombe, J. Spagnoletti, P. Svensson, C. E. Wallis, B. Williams, J. Wu, C. Y. Yates, D.
contents	The region of $N\approx Z\approx 40$ has long been associated with strongly deformed nuclear configurations. The presence of this strong deformation was recently confirmed through lifetime measurements in $N\approx Z$ Sr and Zr nuclei. Theoretically, however, these nuclei present a challenge due to the vast valence space required to incorporate all deformation driving interactions. Recent state-of-the-art predictions indicate a near axial prolate deformation for $N=Z$ and $N=Z+2$ nuclei between $N=Z=36$ and $N=Z=40$. In this work we investigate the shores of this island of deformation through a sub-barrier Coulomb excitation study of the $N=Z+4$ nucleus, \textsuperscript{80}Sr. Extracting a spectroscopic quadrupole moment of $Q_s(2^+_1) = 0.45^{+0.83}_{-0.88}$~eb, we find that \textsuperscript{80}Sr is inconsistent with significant axial prolate deformation. This indicates that the predicted region of strong prolate deformation around $N=Z=40$ is tightly constrained to the quartet of nuclei: \textsuperscript{76,78}Sr and \textsuperscript{78,80}Zr.
format	Preprint
id	arxiv_https___arxiv_org_abs_2408_08410
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Coulomb Excitation of $^{80}$Sr and the limits of the $N = Z = 40$ island of deformation Russell, R. Heery, J. Henderson, J. Wadsworth, R. Kaneko, K. Shimizu, N. Mizusaki, T. Sun, Y. Andreoiu, C. Annen, D. W. Avaa, A. A. Ball, G. C. Bildstein, V. Buck, S. Cousins, C. Garnsworthy, A. B. Gillespie, S. A. Greaves, B. Grimes, A. Hackman, G. Hughes, R. O. Jenkins, D. G. Kowalewski, T. M. Martin, M. S. Müller-Gatermann, C. Murias, J. R. Murillo-Morales, S. Pascu, S. Rhodes, D. M. Smallcombe, J. Spagnoletti, P. Svensson, C. E. Wallis, B. Williams, J. Wu, C. Y. Yates, D. Nuclear Experiment Nuclear Theory The region of $N\approx Z\approx 40$ has long been associated with strongly deformed nuclear configurations. The presence of this strong deformation was recently confirmed through lifetime measurements in $N\approx Z$ Sr and Zr nuclei. Theoretically, however, these nuclei present a challenge due to the vast valence space required to incorporate all deformation driving interactions. Recent state-of-the-art predictions indicate a near axial prolate deformation for $N=Z$ and $N=Z+2$ nuclei between $N=Z=36$ and $N=Z=40$. In this work we investigate the shores of this island of deformation through a sub-barrier Coulomb excitation study of the $N=Z+4$ nucleus, \textsuperscript{80}Sr. Extracting a spectroscopic quadrupole moment of $Q_s(2^+_1) = 0.45^{+0.83}_{-0.88}$~eb, we find that \textsuperscript{80}Sr is inconsistent with significant axial prolate deformation. This indicates that the predicted region of strong prolate deformation around $N=Z=40$ is tightly constrained to the quartet of nuclei: \textsuperscript{76,78}Sr and \textsuperscript{78,80}Zr.
title	Coulomb Excitation of $^{80}$Sr and the limits of the $N = Z = 40$ island of deformation
topic	Nuclear Experiment Nuclear Theory
url	https://arxiv.org/abs/2408.08410