β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes

N. Alkhomashi; P.H. Regan; Zs. Podolyak; S. Pietri; A.B. Garnsworthy; S.J. Steer; J. Benlliure; E. Caserejos; R.F. Casten; J. Gerl; H.J. Wollersheim; J. Grebosz; G. Farrelly; M. Górska; I. Kojouharov; H. Schaffner; A. Algora; G. Benzoni; A. Blazhev; P. Boutachkov; Alison Bruce; A.M. Denis Bacelar; I.J. Cullen; L. Cáceres; P. Doornenbal; M.E. Estevez; Y. Fujita; W. Gelletly; R. Hoischen; R. Kumar; N. Kurz; S. Lalkovski; Z. Liu; C. Mihai; F. Molina; A.I. Morales; D. Mücher; W. Prokopowicz; B. Rubio; Y. Shi; A. Tamii; S. Tashenov; J.J. Valiente-Dobón; P.M. Walker; P.J. Woods; F.R. Xu

doi:10.1103/PhysRevC.80.064308

β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes

N. Alkhomashi, P.H. Regan, Zs. Podolyak, S. Pietri, A.B. Garnsworthy, S.J. Steer, J. Benlliure, E. Caserejos, R.F. Casten, J. Gerl, H.J. Wollersheim, J. Grebosz, G. Farrelly, M. Górska, I. Kojouharov, H. Schaffner, A. Algora, G. Benzoni, A. Blazhev, P. BoutachkovAlison Bruce, A.M. Denis Bacelar, I.J. Cullen, L. Cáceres, P. Doornenbal, M.E. Estevez, Y. Fujita, W. Gelletly, R. Hoischen, R. Kumar, N. Kurz, S. Lalkovski, Z. Liu, C. Mihai, F. Molina, A.I. Morales, D. Mücher, W. Prokopowicz, B. Rubio, Y. Shi, A. Tamii, S. Tashenov, J.J. Valiente-Dobón, P.M. Walker, P.J. Woods, F.R. Xu

University of Brighton

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

Abstract

The low-lying structure of ^188,190,192W has been studied following β decays of the neutron-rich mother nuclei ^188,190,192Ta produced following the projectile fragmentation of a 1-GeV-per-nucleon ²⁰⁸Pb primary beam on a natural beryllium target at the GSI Fragmentation Separator. The β-decay half-lives of ¹⁸⁸Ta, ¹⁹⁰Ta and ¹⁹²Ta have been measured, with γ-ray decays of low-lying states in their respective W daughter nuclei, using heavy-ion β-γ correlations and a position-sensitive silicon detector setup. The data provide information on the low-lying excited states in ¹⁸⁸W, ¹⁹⁰W and ¹⁹²W, which highlight a change in nuclear shape at ¹⁹⁰W compared with that of lighter W isotopes. This evolution of ground-state structure along the W isotopic chain is discussed as evidence for a possible proton subshell effect for the A~190 region and is consistent with maximisation of the γ-softness of the nuclear potential around N~116

Original language	English
Journal	Physical Review C
Volume	80
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.80.064308
Publication status	Published - Dec 2009

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Alkhomashi, N., Regan, P. H., Podolyak, Z., Pietri, S., Garnsworthy, A. B., Steer, S. J., Benlliure, J., Caserejos, E., Casten, R. F., Gerl, J., Wollersheim, H. J., Grebosz, J., Farrelly, G., Górska, M., Kojouharov, I., Schaffner, H., Algora, A., Benzoni, G., Blazhev, A., ... Xu, F. R. (2009). β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes. Physical Review C, 80(6). https://doi.org/10.1103/PhysRevC.80.064308

@article{c4a4544e5e654b0ba66ad5d767ee81f1,

title = "β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes",

abstract = "The low-lying structure of 188,190,192W has been studied following β decays of the neutron-rich mother nuclei 188,190,192Ta produced following the projectile fragmentation of a 1-GeV-per-nucleon 208Pb primary beam on a natural beryllium target at the GSI Fragmentation Separator. The β-decay half-lives of 188Ta, 190Ta and 192Ta have been measured, with γ-ray decays of low-lying states in their respective W daughter nuclei, using heavy-ion β-γ correlations and a position-sensitive silicon detector setup. The data provide information on the low-lying excited states in 188W, 190W and 192W, which highlight a change in nuclear shape at 190W compared with that of lighter W isotopes. This evolution of ground-state structure along the W isotopic chain is discussed as evidence for a possible proton subshell effect for the A~190 region and is consistent with maximisation of the γ-softness of the nuclear potential around N~116",

author = "N. Alkhomashi and P.H. Regan and Zs. Podolyak and S. Pietri and A.B. Garnsworthy and S.J. Steer and J. Benlliure and E. Caserejos and R.F. Casten and J. Gerl and H.J. Wollersheim and J. Grebosz and G. Farrelly and M. G{\'o}rska and I. Kojouharov and H. Schaffner and A. Algora and G. Benzoni and A. Blazhev and P. Boutachkov and Alison Bruce and {Denis Bacelar}, A.M. and I.J. Cullen and L. C{\'a}ceres and P. Doornenbal and M.E. Estevez and Y. Fujita and W. Gelletly and R. Hoischen and R. Kumar and N. Kurz and S. Lalkovski and Z. Liu and C. Mihai and F. Molina and A.I. Morales and D. M{\"u}cher and W. Prokopowicz and B. Rubio and Y. Shi and A. Tamii and S. Tashenov and J.J. Valiente-Dob{\'o}n and P.M. Walker and P.J. Woods and F.R. Xu",

year = "2009",

month = dec,

doi = "10.1103/PhysRevC.80.064308",

language = "English",

volume = "80",

journal = "Physical Review C",

issn = "1089-490X",

number = "6",

}

Alkhomashi, N, Regan, PH, Podolyak, Z, Pietri, S, Garnsworthy, AB, Steer, SJ, Benlliure, J, Caserejos, E, Casten, RF, Gerl, J, Wollersheim, HJ, Grebosz, J, Farrelly, G, Górska, M, Kojouharov, I, Schaffner, H, Algora, A, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, A, Denis Bacelar, AM, Cullen, IJ, Cáceres, L, Doornenbal, P, Estevez, ME, Fujita, Y, Gelletly, W, Hoischen, R, Kumar, R, Kurz, N, Lalkovski, S, Liu, Z, Mihai, C, Molina, F, Morales, AI, Mücher, D, Prokopowicz, W, Rubio, B, Shi, Y, Tamii, A, Tashenov, S, Valiente-Dobón, JJ, Walker, PM, Woods, PJ & Xu, FR 2009, 'β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes', Physical Review C, vol. 80, no. 6. https://doi.org/10.1103/PhysRevC.80.064308

TY - JOUR

T1 - β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes

AU - Alkhomashi, N.

AU - Regan, P.H.

AU - Podolyak, Zs.

AU - Pietri, S.

AU - Garnsworthy, A.B.

AU - Steer, S.J.

AU - Benlliure, J.

AU - Caserejos, E.

AU - Casten, R.F.

AU - Gerl, J.

AU - Wollersheim, H.J.

AU - Grebosz, J.

AU - Farrelly, G.

AU - Górska, M.

AU - Kojouharov, I.

AU - Schaffner, H.

AU - Algora, A.

AU - Benzoni, G.

AU - Blazhev, A.

AU - Boutachkov, P.

AU - Bruce, Alison

AU - Denis Bacelar, A.M.

AU - Cullen, I.J.

AU - Cáceres, L.

AU - Doornenbal, P.

AU - Estevez, M.E.

AU - Fujita, Y.

AU - Gelletly, W.

AU - Hoischen, R.

AU - Kumar, R.

AU - Kurz, N.

AU - Lalkovski, S.

AU - Liu, Z.

AU - Mihai, C.

AU - Molina, F.

AU - Morales, A.I.

AU - Mücher, D.

AU - Prokopowicz, W.

AU - Rubio, B.

AU - Shi, Y.

AU - Tamii, A.

AU - Tashenov, S.

AU - Valiente-Dobón, J.J.

AU - Walker, P.M.

AU - Woods, P.J.

AU - Xu, F.R.

PY - 2009/12

Y1 - 2009/12

N2 - The low-lying structure of 188,190,192W has been studied following β decays of the neutron-rich mother nuclei 188,190,192Ta produced following the projectile fragmentation of a 1-GeV-per-nucleon 208Pb primary beam on a natural beryllium target at the GSI Fragmentation Separator. The β-decay half-lives of 188Ta, 190Ta and 192Ta have been measured, with γ-ray decays of low-lying states in their respective W daughter nuclei, using heavy-ion β-γ correlations and a position-sensitive silicon detector setup. The data provide information on the low-lying excited states in 188W, 190W and 192W, which highlight a change in nuclear shape at 190W compared with that of lighter W isotopes. This evolution of ground-state structure along the W isotopic chain is discussed as evidence for a possible proton subshell effect for the A~190 region and is consistent with maximisation of the γ-softness of the nuclear potential around N~116

AB - The low-lying structure of 188,190,192W has been studied following β decays of the neutron-rich mother nuclei 188,190,192Ta produced following the projectile fragmentation of a 1-GeV-per-nucleon 208Pb primary beam on a natural beryllium target at the GSI Fragmentation Separator. The β-decay half-lives of 188Ta, 190Ta and 192Ta have been measured, with γ-ray decays of low-lying states in their respective W daughter nuclei, using heavy-ion β-γ correlations and a position-sensitive silicon detector setup. The data provide information on the low-lying excited states in 188W, 190W and 192W, which highlight a change in nuclear shape at 190W compared with that of lighter W isotopes. This evolution of ground-state structure along the W isotopic chain is discussed as evidence for a possible proton subshell effect for the A~190 region and is consistent with maximisation of the γ-softness of the nuclear potential around N~116

U2 - 10.1103/PhysRevC.80.064308

DO - 10.1103/PhysRevC.80.064308

M3 - Article

SN - 1089-490X

VL - 80

JO - Physical Review C

JF - Physical Review C

IS - 6

ER -

β-delayed spectroscopy of neutron-rich-tantalum nuclei: Shape evolution in neutro-rich tungsten isotopes

Abstract

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