Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643 Tc

A.B. Garnsworthy; P.H. Regan; L. Cáceres; S. Pietri; Y. Sun; D. Rudolph; M. Górska; Zs. Podolyák; S.J. Steer; R. Hoischen; A. Heinz; F. Becker; P. Bednarczyk; P. Doornenbal; H. Geissel; J. Gerl; H. Grawe; J. Grëbosz; A. Kelic; I. Kojouharov; N. Kurz; F. Montes; W. Prokopowicz; T. Saito; H. Scaffner; S. Tachenov; E. Werner-Malento; H.J. Wollersheim; G. Benzoni; B.B. Blank; C. Brandau; Alison Bruce; F. Camera; W.N. Catford; I.J. Cullen; Zs. Dombrádi; E. Estevez; W. Gelletly; G. Ilie; J. Jolie; G.A. Jones; A. Jungclaus; M. Kmiecik; F.G. Kondev; T. Kurtukian-Nieto; S. Lalkovski; Z. Liu; A. Maj; S. Myalski; M. Pfützner

doi:10/1016/j.physletb.2008.01.017

Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei ⁸²₄₁Nb and ⁸⁶₄₃ Tc

A.B. Garnsworthy, P.H. Regan, L. Cáceres, S. Pietri, Y. Sun, D. Rudolph, M. Górska, Zs. Podolyák, S.J. Steer, R. Hoischen, A. Heinz, F. Becker, P. Bednarczyk, P. Doornenbal, H. Geissel, J. Gerl, H. Grawe, J. Grëbosz, A. Kelic, I. KojouharovN. Kurz, F. Montes, W. Prokopowicz, T. Saito, H. Scaffner, S. Tachenov, E. Werner-Malento, H.J. Wollersheim, G. Benzoni, B.B. Blank, C. Brandau, Alison Bruce, F. Camera, W.N. Catford, I.J. Cullen, Zs. Dombrádi, E. Estevez, W. Gelletly, G. Ilie, J. Jolie, G.A. Jones, A. Jungclaus, M. Kmiecik, F.G. Kondev, T. Kurtukian-Nieto, S. Lalkovski, Z. Liu, A. Maj, S. Myalski, M. Pfützner

University of Brighton

Research output: Contribution to journal › Article › peer-review

Abstract

The low-lying structures of the self-conjugate (N=Z) nuclei ⁸²₄₁Nb₄₁ and ⁸⁶₄₃Tc₄₃ have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a ¹⁰⁷Ag beam. These represent the heaviest odd–odd N=Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N=Z line between the doubly-magic systems ⁵⁶₂₈Ni and ¹⁰⁰₅₀Sn and support a preference for T=1 states in Tz=0 odd–odd nuclei at low excitation energies associated with a T=1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in ⁸²Nb may be interpreted as an isospin-changing K isomer.

Original language	English
Pages (from-to)	326-330
Number of pages	5
Journal	Physics Letters B
Volume	660
Issue number	4
DOIs	https://doi.org/10/1016/j.physletb.2008.01.017
Publication status	Published - 28 Feb 2008

Bibliographical note

This is the author’s version of a work that was accepted for publication in Physics Letters B. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physics Letters B, 660, 4, 2008, 10/1016/j.physletb.2008.01.017

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Cite this

Garnsworthy, A. B., Regan, P. H., Cáceres, L., Pietri, S., Sun, Y., Rudolph, D., Górska, M., Podolyák, Z., Steer, S. J., Hoischen, R., Heinz, A., Becker, F., Bednarczyk, P., Doornenbal, P., Geissel, H., Gerl, J., Grawe, H., Grëbosz, J., Kelic, A., ... Pfützner, M. (2008). Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei ⁸²₄₁Nb and ⁸⁶₄₃ Tc. Physics Letters B, 660(4), 326-330. https://doi.org/10/1016/j.physletb.2008.01.017

@article{a8683a6a94d14bc8ad2b47a45888134b,

title = "Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643 Tc",

abstract = "The low-lying structures of the self-conjugate (N=Z) nuclei 8241Nb41 and 8643Tc43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a 107Ag beam. These represent the heaviest odd–odd N=Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N=Z line between the doubly-magic systems 5628Ni and 10050Sn and support a preference for T=1 states in Tz=0 odd–odd nuclei at low excitation energies associated with a T=1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer.",

author = "A.B. Garnsworthy and P.H. Regan and L. C{\'a}ceres and S. Pietri and Y. Sun and D. Rudolph and M. G{\'o}rska and Zs. Podoly{\'a}k and S.J. Steer and R. Hoischen and A. Heinz and F. Becker and P. Bednarczyk and P. Doornenbal and H. Geissel and J. Gerl and H. Grawe and J. Gr{\"e}bosz and A. Kelic and I. Kojouharov and N. Kurz and F. Montes and W. Prokopowicz and T. Saito and H. Scaffner and S. Tachenov and E. Werner-Malento and H.J. Wollersheim and G. Benzoni and B.B. Blank and C. Brandau and Alison Bruce and F. Camera and W.N. Catford and I.J. Cullen and Zs. Dombr{\'a}di and E. Estevez and W. Gelletly and G. Ilie and J. Jolie and G.A. Jones and A. Jungclaus and M. Kmiecik and F.G. Kondev and T. Kurtukian-Nieto and S. Lalkovski and Z. Liu and A. Maj and S. Myalski and M. Pf{\"u}tzner",

note = "This is the author{\textquoteright}s version of a work that was accepted for publication in Physics Letters B. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physics Letters B, 660, 4, 2008, 10/1016/j.physletb.2008.01.017",

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pages = "326--330",

journal = "Physics Letters B",

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Garnsworthy, AB, Regan, PH, Cáceres, L, Pietri, S, Sun, Y, Rudolph, D, Górska, M, Podolyák, Z, Steer, SJ, Hoischen, R, Heinz, A, Becker, F, Bednarczyk, P, Doornenbal, P, Geissel, H, Gerl, J, Grawe, H, Grëbosz, J, Kelic, A, Kojouharov, I, Kurz, N, Montes, F, Prokopowicz, W, Saito, T, Scaffner, H, Tachenov, S, Werner-Malento, E, Wollersheim, HJ, Benzoni, G, Blank, BB, Brandau, C, Bruce, A, Camera, F, Catford, WN, Cullen, IJ, Dombrádi, Z, Estevez, E, Gelletly, W, Ilie, G, Jolie, J, Jones, GA, Jungclaus, A, Kmiecik, M, Kondev, FG, Kurtukian-Nieto, T, Lalkovski, S, Liu, Z, Maj, A, Myalski, S & Pfützner, M 2008, 'Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei ⁸²₄₁Nb and ⁸⁶₄₃ Tc', Physics Letters B, vol. 660, no. 4, pp. 326-330. https://doi.org/10/1016/j.physletb.2008.01.017

TY - JOUR

T1 - Neutron-proton pairing competition in N=Z nuclei: Metastable state decays in the proton dripline nuclei 8241Nb and 8643 Tc

AU - Garnsworthy, A.B.

AU - Regan, P.H.

AU - Cáceres, L.

AU - Pietri, S.

AU - Sun, Y.

AU - Rudolph, D.

AU - Górska, M.

AU - Podolyák, Zs.

AU - Steer, S.J.

AU - Hoischen, R.

AU - Heinz, A.

AU - Becker, F.

AU - Bednarczyk, P.

AU - Doornenbal, P.

AU - Geissel, H.

AU - Gerl, J.

AU - Grawe, H.

AU - Grëbosz, J.

AU - Kelic, A.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Montes, F.

AU - Prokopowicz, W.

AU - Saito, T.

AU - Scaffner, H.

AU - Tachenov, S.

AU - Werner-Malento, E.

AU - Wollersheim, H.J.

AU - Benzoni, G.

AU - Blank, B.B.

AU - Brandau, C.

AU - Bruce, Alison

AU - Camera, F.

AU - Catford, W.N.

AU - Cullen, I.J.

AU - Dombrádi, Zs.

AU - Estevez, E.

AU - Gelletly, W.

AU - Ilie, G.

AU - Jolie, J.

AU - Jones, G.A.

AU - Jungclaus, A.

AU - Kmiecik, M.

AU - Kondev, F.G.

AU - Kurtukian-Nieto, T.

AU - Lalkovski, S.

AU - Liu, Z.

AU - Maj, A.

AU - Myalski, S.

AU - Pfützner, M.

N1 - This is the author’s version of a work that was accepted for publication in Physics Letters B. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physics Letters B, 660, 4, 2008, 10/1016/j.physletb.2008.01.017

PY - 2008/2/28

Y1 - 2008/2/28

N2 - The low-lying structures of the self-conjugate (N=Z) nuclei 8241Nb41 and 8643Tc43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a 107Ag beam. These represent the heaviest odd–odd N=Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N=Z line between the doubly-magic systems 5628Ni and 10050Sn and support a preference for T=1 states in Tz=0 odd–odd nuclei at low excitation energies associated with a T=1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer.

AB - The low-lying structures of the self-conjugate (N=Z) nuclei 8241Nb41 and 8643Tc43 have been investigated using isomeric-decay spectroscopy following the projectile fragmentation of a 107Ag beam. These represent the heaviest odd–odd N=Z nuclei in which internal decays have been identified to date. The resulting level schemes shed light on the shape evolution along the N=Z line between the doubly-magic systems 5628Ni and 10050Sn and support a preference for T=1 states in Tz=0 odd–odd nuclei at low excitation energies associated with a T=1 neutron–proton pairing gap. Comparison with Projected Shell Model calculations suggests that the decay in 82Nb may be interpreted as an isospin-changing K isomer.

U2 - 10/1016/j.physletb.2008.01.017

DO - 10/1016/j.physletb.2008.01.017

M3 - Article

SN - 0370-2693

VL - 660

SP - 326

EP - 330

JO - Physics Letters B

JF - Physics Letters B

IS - 4

ER -