Collectivity at the prolate-oblate transition: the 21+ lifetime of 190W

E. Şahin; V. Werner; A.K. Mistry; M. Rudigier; K. Nomura; J. Jolie; N. Pietralla; P.H. Regan; G. Ağgez; H.M. Albers; U. Ahmed; Ö. Aktaş; A. Algora; S. Alhomaidhi; C. Appleton; T. Arici; M. Armstrong; A. Banerjee; J. Benito; G. Benzoni; A. Blazhev; P. Boutachkov; A.M. Bruce; B. Cederwall; M.M.R. Chishti; M.L. Cortés; F. Crespi; B. Das; T. Davinson; T. Dickel; M. Doncel; A. Ertoprak; A. Esmaylzadeh; L.M. Fraile; E.R. Gamba; J. Gerl; M. Górska; J. Ha; E. Haettner; O. Hall; H. Heggen; C. Hornung; N. Hubbard; S. Jazrawi; P.R. John; C.E. Jones; V. Karayonchev; E. Kazantseva; R. Kern; L. Knafla; I. Kojouharov; P. Koseoglou; G. Kosir; D. Kostyleva; N. Kurz; N. Kuzminchuk; M. Llanos-Expósito; R. Lozeva; D. Mengoni; T.J. Mertzimekis; M. Mikolajczuk; A.I. Morales; I. Mukha; J.R. Murias; B.S. Nara Singh; S.E.A. Orrigo; J. Pellumaj; S. Pelonis; S. Pietri; S. Pigliapoco; Zs. Podolyák; M. Polettini; K. Rezynkina; H.A. Rösch; H. Schaffner; Ch. Scheidenberger; L. Sexton; P.-A. Söderström; Y.K. Tanaka; J.J. Valiente-Dobón; P. Vasileiou; J. Vasiljević; J. Vesic; H. Weick; J. Wiederhold; A. Yaneva; G. Zhang; J. Zhao; A. Zyriliou

doi:10.1016/j.physletb.2024.138976

Collectivity at the prolate-oblate transition: the 2₁⁺ lifetime of ¹⁹⁰W

E. Şahin^*, V. Werner^*, A.K. Mistry, M. Rudigier, K. Nomura, J. Jolie, N. Pietralla, P.H. Regan, G. Ağgez, H.M. Albers, U. Ahmed, Ö. Aktaş, A. Algora, S. Alhomaidhi, C. Appleton, T. Arici, M. Armstrong, A. Banerjee, J. Benito, G. BenzoniA. Blazhev, P. Boutachkov, A.M. Bruce, B. Cederwall, M.M.R. Chishti, M.L. Cortés, F. Crespi, B. Das, T. Davinson, T. Dickel, M. Doncel, A. Ertoprak, A. Esmaylzadeh, L.M. Fraile, E.R. Gamba, J. Gerl, M. Górska, J. Ha, E. Haettner, O. Hall, H. Heggen, C. Hornung, N. Hubbard, S. Jazrawi, P.R. John, C.E. Jones, V. Karayonchev, E. Kazantseva, R. Kern, L. Knafla, I. Kojouharov, P. Koseoglou, G. Kosir, D. Kostyleva, N. Kurz, N. Kuzminchuk, M. Llanos-Expósito, R. Lozeva, D. Mengoni, T.J. Mertzimekis, M. Mikolajczuk, A.I. Morales, I. Mukha, J.R. Murias, B.S. Nara Singh, S.E.A. Orrigo, J. Pellumaj, S. Pelonis, S. Pietri, S. Pigliapoco, Zs. Podolyák, M. Polettini, K. Rezynkina, H.A. Rösch, H. Schaffner, Ch. Scheidenberger, L. Sexton, P.-A. Söderström, Y.K. Tanaka, J.J. Valiente-Dobón, P. Vasileiou, J. Vasiljević, J. Vesic, H. Weick, J. Wiederhold, A. Yaneva, G. Zhang, J. Zhao, A. Zyriliou

^*Corresponding author for this work

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Abstract

The neutron-rich rare isotope ¹⁹⁰W is discussed as a candidate for a prolate-oblate transitional nucleus with maximum γ-softness. The collectivity of this isotope is assessed for the first time by the measurement of the reduced E2 transition probability of its first 2⁺ state to the ground state. The experiment employed the FAst TIming Array (FATIMA), comprised of 36 LaBr₃(Ce) scintillators, which was part of the DESPEC setup at GSI, Darmstadt. The 4₁⁺and 2₁⁺ states of ¹⁹⁰W were populated subsequently to the decay of its 127(12) μs isomeric J^π= 10^-state. The mean lifetime of the 2₁⁺ state was determined to be τ = 274(28) ps, which corresponds to a B(E2; 2₁⁺ → 0₁⁺) value of 95(10) W.u. The results motivated a revision of previous calculations within an energy-density functional-based interacting boson model-2 approach, yielding E2 transition properties and spectroscopic quadrupole moments for tungsten isotopes. From comparison to theory, the new data suggest that ¹⁹⁰W is at the transition from prolate to oblate structure along the W isotopic chain, which had previously been discussed as a nuclear shape-phase transition.

Original language	English
Article number	138976
Number of pages	8
Journal	Physics Letters B
Volume	857
Early online date	22 Aug 2024
DOIs	https://doi.org/10.1016/j.physletb.2024.138976
Publication status	E-pub ahead of print - 22 Aug 2024

Keywords

nuclear structure
y-ray spectroscopy
isomer spectroscopy
shape phase transition
DESPEC
NUSTAR

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2024 08 19 Sahin et al Collectivity finalFinal published version, 1.5 MBLicence: CC BY 4.0

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Şahin, E., Werner, V., Mistry, A. K., Rudigier, M., Nomura, K., Jolie, J., Pietralla, N., Regan, P. H., Ağgez, G., Albers, H. M., Ahmed, U., Aktaş, Ö., Algora, A., Alhomaidhi, S., Appleton, C., Arici, T., Armstrong, M., Banerjee, A., Benito, J., ... Zyriliou, A. (2024). Collectivity at the prolate-oblate transition: the 2₁⁺ lifetime of ¹⁹⁰W. Physics Letters B, 857, Article 138976. Advance online publication. https://doi.org/10.1016/j.physletb.2024.138976

@article{e3ab660e2b434de794096452daa572b5,

title = "Collectivity at the prolate-oblate transition: the 21+ lifetime of 190W",

abstract = "The neutron-rich rare isotope 190W is discussed as a candidate for a prolate-oblate transitional nucleus with maximum γ-softness. The collectivity of this isotope is assessed for the first time by the measurement of the reduced E2 transition probability of its first 2+ state to the ground state. The experiment employed the FAst TIming Array (FATIMA), comprised of 36 LaBr3(Ce) scintillators, which was part of the DESPEC setup at GSI, Darmstadt. The 41+ and 21+ states of 190W were populated subsequently to the decay of its 127(12) μs isomeric Jπ = 10- state. The mean lifetime of the 21+ state was determined to be τ = 274(28) ps, which corresponds to a B(E2; 21+ → 01+) value of 95(10) W.u. The results motivated a revision of previous calculations within an energy-density functional-based interacting boson model-2 approach, yielding E2 transition properties and spectroscopic quadrupole moments for tungsten isotopes. From comparison to theory, the new data suggest that 190W is at the transition from prolate to oblate structure along the W isotopic chain, which had previously been discussed as a nuclear shape-phase transition.",

keywords = "nuclear structure, y-ray spectroscopy, isomer spectroscopy, shape phase transition, DESPEC, NUSTAR",

author = "E. {\c S}ahin and V. Werner and A.K. Mistry and M. Rudigier and K. Nomura and J. Jolie and N. Pietralla and P.H. Regan and G. Ağgez and H.M. Albers and U. Ahmed and {\"O}. Akta{\c s} and A. Algora and S. Alhomaidhi and C. Appleton and T. Arici and M. Armstrong and A. Banerjee and J. Benito and G. Benzoni and A. Blazhev and P. Boutachkov and A.M. Bruce and B. Cederwall and M.M.R. Chishti and M.L. Cort{\'e}s and F. Crespi and B. Das and T. Davinson and T. Dickel and M. Doncel and A. Ertoprak and A. Esmaylzadeh and L.M. Fraile and E.R. Gamba and J. Gerl and M. G{\'o}rska and J. Ha and E. Haettner and O. Hall and H. Heggen and C. Hornung and N. Hubbard and S. Jazrawi and P.R. John and C.E. Jones and V. Karayonchev and E. Kazantseva and R. Kern and L. Knafla and I. Kojouharov and P. Koseoglou and G. Kosir and D. Kostyleva and N. Kurz and N. Kuzminchuk and M. Llanos-Exp{\'o}sito and R. Lozeva and D. Mengoni and T.J. Mertzimekis and M. Mikolajczuk and A.I. Morales and I. Mukha and J.R. Murias and {Nara Singh}, B.S. and S.E.A. Orrigo and J. Pellumaj and S. Pelonis and S. Pietri and S. Pigliapoco and Zs. Podoly{\'a}k and M. Polettini and K. Rezynkina and H.A. R{\"o}sch and H. Schaffner and Ch. Scheidenberger and L. Sexton and P.-A. S{\"o}derstr{\"o}m and Y.K. Tanaka and J.J. Valiente-Dob{\'o}n and P. Vasileiou and J. Vasiljevi{\'c} and J. Vesic and H. Weick and J. Wiederhold and A. Yaneva and G. Zhang and J. Zhao and A. Zyriliou",

year = "2024",

month = aug,

day = "22",

doi = "10.1016/j.physletb.2024.138976",

language = "English",

volume = "857",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

Şahin, E, Werner, V, Mistry, AK, Rudigier, M, Nomura, K, Jolie, J, Pietralla, N, Regan, PH, Ağgez, G, Albers, HM, Ahmed, U, Aktaş, Ö, Algora, A, Alhomaidhi, S, Appleton, C, Arici, T, Armstrong, M, Banerjee, A, Benito, J, Benzoni, G, Blazhev, A, Boutachkov, P, Bruce, AM, Cederwall, B, Chishti, MMR, Cortés, ML, Crespi, F, Das, B, Davinson, T, Dickel, T, Doncel, M, Ertoprak, A, Esmaylzadeh, A, Fraile, LM, Gamba, ER, Gerl, J, Górska, M, Ha, J, Haettner, E, Hall, O, Heggen, H, Hornung, C, Hubbard, N, Jazrawi, S, John, PR, Jones, CE, Karayonchev, V, Kazantseva, E, Kern, R, Knafla, L, Kojouharov, I, Koseoglou, P, Kosir, G, Kostyleva, D, Kurz, N, Kuzminchuk, N, Llanos-Expósito, M, Lozeva, R, Mengoni, D, Mertzimekis, TJ, Mikolajczuk, M, Morales, AI, Mukha, I, Murias, JR, Nara Singh, BS, Orrigo, SEA, Pellumaj, J, Pelonis, S, Pietri, S, Pigliapoco, S, Podolyák, Z, Polettini, M, Rezynkina, K, Rösch, HA, Schaffner, H, Scheidenberger, C, Sexton, L, Söderström, P-A, Tanaka, YK, Valiente-Dobón, JJ, Vasileiou, P, Vasiljević, J, Vesic, J, Weick, H, Wiederhold, J, Yaneva, A, Zhang, G, Zhao, J & Zyriliou, A 2024, 'Collectivity at the prolate-oblate transition: the 2₁⁺ lifetime of ¹⁹⁰W', Physics Letters B, vol. 857, 138976. https://doi.org/10.1016/j.physletb.2024.138976

TY - JOUR

T1 - Collectivity at the prolate-oblate transition

T2 - the 21+ lifetime of 190W

AU - Şahin, E.

AU - Werner, V.

AU - Mistry, A.K.

AU - Rudigier, M.

AU - Nomura, K.

AU - Jolie, J.

AU - Pietralla, N.

AU - Regan, P.H.

AU - Ağgez, G.

AU - Albers, H.M.

AU - Ahmed, U.

AU - Aktaş, Ö.

AU - Algora, A.

AU - Alhomaidhi, S.

AU - Appleton, C.

AU - Arici, T.

AU - Armstrong, M.

AU - Banerjee, A.

AU - Benito, J.

AU - Benzoni, G.

AU - Blazhev, A.

AU - Boutachkov, P.

AU - Bruce, A.M.

AU - Cederwall, B.

AU - Chishti, M.M.R.

AU - Cortés, M.L.

AU - Crespi, F.

AU - Das, B.

AU - Davinson, T.

AU - Dickel, T.

AU - Doncel, M.

AU - Ertoprak, A.

AU - Esmaylzadeh, A.

AU - Fraile, L.M.

AU - Gamba, E.R.

AU - Gerl, J.

AU - Górska, M.

AU - Ha, J.

AU - Haettner, E.

AU - Hall, O.

AU - Heggen, H.

AU - Hornung, C.

AU - Hubbard, N.

AU - Jazrawi, S.

AU - John, P.R.

AU - Jones, C.E.

AU - Karayonchev, V.

AU - Kazantseva, E.

AU - Kern, R.

AU - Knafla, L.

AU - Kojouharov, I.

AU - Koseoglou, P.

AU - Kosir, G.

AU - Kostyleva, D.

AU - Kurz, N.

AU - Kuzminchuk, N.

AU - Llanos-Expósito, M.

AU - Lozeva, R.

AU - Mengoni, D.

AU - Mertzimekis, T.J.

AU - Mikolajczuk, M.

AU - Morales, A.I.

AU - Mukha, I.

AU - Murias, J.R.

AU - Nara Singh, B.S.

AU - Orrigo, S.E.A.

AU - Pellumaj, J.

AU - Pelonis, S.

AU - Pietri, S.

AU - Pigliapoco, S.

AU - Podolyák, Zs.

AU - Polettini, M.

AU - Rezynkina, K.

AU - Rösch, H.A.

AU - Schaffner, H.

AU - Scheidenberger, Ch.

AU - Sexton, L.

AU - Söderström, P.-A.

AU - Tanaka, Y.K.

AU - Valiente-Dobón, J.J.

AU - Vasileiou, P.

AU - Vasiljević, J.

AU - Vesic, J.

AU - Weick, H.

AU - Wiederhold, J.

AU - Yaneva, A.

AU - Zhang, G.

AU - Zhao, J.

AU - Zyriliou, A.

PY - 2024/8/22

Y1 - 2024/8/22

N2 - The neutron-rich rare isotope 190W is discussed as a candidate for a prolate-oblate transitional nucleus with maximum γ-softness. The collectivity of this isotope is assessed for the first time by the measurement of the reduced E2 transition probability of its first 2+ state to the ground state. The experiment employed the FAst TIming Array (FATIMA), comprised of 36 LaBr3(Ce) scintillators, which was part of the DESPEC setup at GSI, Darmstadt. The 41+ and 21+ states of 190W were populated subsequently to the decay of its 127(12) μs isomeric Jπ = 10- state. The mean lifetime of the 21+ state was determined to be τ = 274(28) ps, which corresponds to a B(E2; 21+ → 01+) value of 95(10) W.u. The results motivated a revision of previous calculations within an energy-density functional-based interacting boson model-2 approach, yielding E2 transition properties and spectroscopic quadrupole moments for tungsten isotopes. From comparison to theory, the new data suggest that 190W is at the transition from prolate to oblate structure along the W isotopic chain, which had previously been discussed as a nuclear shape-phase transition.

AB - The neutron-rich rare isotope 190W is discussed as a candidate for a prolate-oblate transitional nucleus with maximum γ-softness. The collectivity of this isotope is assessed for the first time by the measurement of the reduced E2 transition probability of its first 2+ state to the ground state. The experiment employed the FAst TIming Array (FATIMA), comprised of 36 LaBr3(Ce) scintillators, which was part of the DESPEC setup at GSI, Darmstadt. The 41+ and 21+ states of 190W were populated subsequently to the decay of its 127(12) μs isomeric Jπ = 10- state. The mean lifetime of the 21+ state was determined to be τ = 274(28) ps, which corresponds to a B(E2; 21+ → 01+) value of 95(10) W.u. The results motivated a revision of previous calculations within an energy-density functional-based interacting boson model-2 approach, yielding E2 transition properties and spectroscopic quadrupole moments for tungsten isotopes. From comparison to theory, the new data suggest that 190W is at the transition from prolate to oblate structure along the W isotopic chain, which had previously been discussed as a nuclear shape-phase transition.

KW - nuclear structure

KW - y-ray spectroscopy

KW - isomer spectroscopy

KW - shape phase transition

KW - DESPEC

KW - NUSTAR

U2 - 10.1016/j.physletb.2024.138976

DO - 10.1016/j.physletb.2024.138976

M3 - Letter

SN - 0370-2693

VL - 857

JO - Physics Letters B

JF - Physics Letters B

M1 - 138976

ER -

Collectivity at the prolate-oblate transition: the 21+ lifetime of 190W

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Collectivity at the prolate-oblate transition: the 2₁⁺ lifetime of ¹⁹⁰W