Change in structure between the I = 1/2 states in 181Tl and 177,179Au

J.G. Cubiss; A.E. Barzakh; A.N. Andreyev; M. Al Monthery; N. Althubiti; B. Andel; S. Antalic; D. Atanasov; K. Blaum; T.E. Cocolios; T. Day Goodacre; R.P. de Groote; A. de Roubin; G.J. Farooq-Smith; D.V. Fedorov; V.N. Fedosseev; R. Ferrer; D.A. Fink; L.P. Gaffney; L. Ghys; A. Gredley; R.D. Harding; F. Herfurth; M. Huyse; N. Imai; D.T. Joss; U. Köster; S. Kreim; V. Liberati; D. Lunney; K.M. Lynch; V. Manea; B.A. Marsh; Y. Martinez Palenzuela; P.L. Molkanov; P. Mosat; D. Neidherr; G.G. O'Neill; R.D. Page; T.J. Procter; E. Rapisarda; M. Rosenbusch; S. Rothe; K. Sandhu; L. Schweikhard; M.D. Seliverstov; S. Sels; P. Spagnoletti; V.L. Truesdale; C. Van Beveren; P. Van Duppen; M. Veinhard; M. Venhart; M. Veselský; F. Wearing; A. Welker; F. Wienholtz; R.N. Wolf; S.G. Zemlyanoy; K. Zuber

doi:10.1016/j.physletb.2018.10.005

Change in structure between the I = 1/2 states in¹⁸¹Tl and ^177,179Au

J.G. Cubiss, A.E. Barzakh, A.N. Andreyev, M. Al Monthery, N. Althubiti, B. Andel, S. Antalic, D. Atanasov, K. Blaum, T.E. Cocolios, T. Day Goodacre, R.P. de Groote, A. de Roubin, G.J. Farooq-Smith, D.V. Fedorov, V.N. Fedosseev, R. Ferrer, D.A. Fink, L.P. Gaffney, L. GhysA. Gredley, R.D. Harding, F. Herfurth, M. Huyse, N. Imai, D.T. Joss, U. Köster, S. Kreim, V. Liberati, D. Lunney, K.M. Lynch, V. Manea, B.A. Marsh, Y. Martinez Palenzuela, P.L. Molkanov, P. Mosat, D. Neidherr, G.G. O'Neill, R.D. Page, T.J. Procter, E. Rapisarda, M. Rosenbusch, S. Rothe, K. Sandhu, L. Schweikhard, M.D. Seliverstov, S. Sels, P. Spagnoletti, V.L. Truesdale, C. Van Beveren, P. Van Duppen, M. Veinhard, M. Venhart, M. Veselský, F. Wearing, A. Welker, F. Wienholtz, R.N. Wolf, S.G. Zemlyanoy, K. Zuber

Department of Physics & Astronomy

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Abstract

The first accurate measurements of the α-decay branching ratio and half-life of the I^π= 1/2⁺ ground state in ¹⁸¹Tl have been made, along with the first determination of the I= 1/2 magnetic moments and spin assignments of the ground states in ^177,179Au. The results are discussed within the complementary systematics of the reduced α-decay widths and nuclear g factors of low-lying, I^π= 1/2⁺states in the neutron-deficient lead region. The findings shed light on the unexpected hindrance of the 1/2⁺ →1/2⁺, ¹⁸¹Tl⁹ → ¹⁷⁷Au^g α decay, which is explained by a mixing of π3_s1/2and π2d₃_/2configurations in ¹⁷⁷Au^g, whilst ¹⁸¹Tl^g remains a near-pureπ3_s1/2. This conclusion is inferred from the g factor of ¹⁷⁷Au^g which has an intermediate value between those of π3_s1/2 and π2d₃_/2 states. A similar mixed configuration is proposed for the I^π= 1/2⁺ground state of ¹⁷⁹Au. This mixing may provide evidence for triaxial shapes in the ground states in these nuclei.

Original language	English
Pages (from-to)	355-363
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	786
DOIs	https://doi.org/10.1016/j.physletb.2018.10.005
Publication status	Published - 10 Nov 2018

Keywords

nuclear physics
decay spectroscopy
laser spectroscopy
nuclear deformation
gold nuclei
thallium nuclei

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10.1016/j.physletb.2018.10.005

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Cubiss, J. G., Barzakh, A. E., Andreyev, A. N., Al Monthery, M., Althubiti, N., Andel, B., Antalic, S., Atanasov, D., Blaum, K., Cocolios, T. E., Day Goodacre, T., de Groote, R. P., de Roubin, A., Farooq-Smith, G. J., Fedorov, D. V., Fedosseev, V. N., Ferrer, R., Fink, D. A., Gaffney, L. P., ... Zuber, K. (2018). Change in structure between the I = 1/2 states in¹⁸¹Tl and ^177,179Au. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 786, 355-363. https://doi.org/10.1016/j.physletb.2018.10.005

@article{1c787826549442dc9f50661c4a80dc04,

title = "Change in structure between the I = 1/2 states in 181Tl and 177,179Au",

abstract = "The first accurate measurements of the α-decay branching ratio and half-life of the Iπ = 1/2+ ground state in 181Tl have been made, along with the first determination of the I = 1/2 magnetic moments and spin assignments of the ground states in 177,179Au. The results are discussed within the complementary systematics of the reduced α-decay widths and nuclear g factors of low-lying, Iπ = 1/2+ states in the neutron-deficient lead region. The findings shed light on the unexpected hindrance of the 1/2+ →1/2+, 181Tl9 → 177Aug α decay, which is explained by a mixing of π3s1/2 and π2d3/2 configurations in 177Aug, whilst 181Tlg remains a near-pureπ3s1/2. This conclusion is inferred from the g factor of 177Aug which has an intermediate value between those of π3s1/2 and π2d3/2 states. A similar mixed configuration is proposed for the Iπ = 1/2+ ground state of 179Au. This mixing may provide evidence for triaxial shapes in the ground states in these nuclei.",

keywords = "nuclear physics, decay spectroscopy, laser spectroscopy, nuclear deformation, gold nuclei, thallium nuclei",

author = "J.G. Cubiss and A.E. Barzakh and A.N. Andreyev and {Al Monthery}, M. and N. Althubiti and B. Andel and S. Antalic and D. Atanasov and K. Blaum and T.E. Cocolios and {Day Goodacre}, T. and {de Groote}, R.P. and {de Roubin}, A. and G.J. Farooq-Smith and D.V. Fedorov and V.N. Fedosseev and R. Ferrer and D.A. Fink and L.P. Gaffney and L. Ghys and A. Gredley and R.D. Harding and F. Herfurth and M. Huyse and N. Imai and D.T. Joss and U. K{\"o}ster and S. Kreim and V. Liberati and D. Lunney and K.M. Lynch and V. Manea and B.A. Marsh and {Martinez Palenzuela}, Y. and P.L. Molkanov and P. Mosat and D. Neidherr and G.G. O'Neill and R.D. Page and T.J. Procter and E. Rapisarda and M. Rosenbusch and S. Rothe and K. Sandhu and L. Schweikhard and M.D. Seliverstov and S. Sels and P. Spagnoletti and V.L. Truesdale and {Van Beveren}, C. and {Van Duppen}, P. and M. Veinhard and M. Venhart and M. Veselsk{\'y} and F. Wearing and A. Welker and F. Wienholtz and R.N. Wolf and S.G. Zemlyanoy and K. Zuber",

year = "2018",

month = nov,

day = "10",

doi = "10.1016/j.physletb.2018.10.005",

language = "English",

volume = "786",

pages = "355--363",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

}

Cubiss, JG, Barzakh, AE, Andreyev, AN, Al Monthery, M, Althubiti, N, Andel, B, Antalic, S, Atanasov, D, Blaum, K, Cocolios, TE, Day Goodacre, T, de Groote, RP, de Roubin, A, Farooq-Smith, GJ, Fedorov, DV, Fedosseev, VN, Ferrer, R, Fink, DA, Gaffney, LP, Ghys, L, Gredley, A, Harding, RD, Herfurth, F, Huyse, M, Imai, N, Joss, DT, Köster, U, Kreim, S, Liberati, V, Lunney, D, Lynch, KM, Manea, V, Marsh, BA, Martinez Palenzuela, Y, Molkanov, PL, Mosat, P, Neidherr, D, O'Neill, GG, Page, RD, Procter, TJ, Rapisarda, E, Rosenbusch, M, Rothe, S, Sandhu, K, Schweikhard, L, Seliverstov, MD, Sels, S, Spagnoletti, P, Truesdale, VL, Van Beveren, C, Van Duppen, P, Veinhard, M, Venhart, M, Veselský, M, Wearing, F, Welker, A, Wienholtz, F, Wolf, RN, Zemlyanoy, SG & Zuber, K 2018, 'Change in structure between the I = 1/2 states in¹⁸¹Tl and ^177,179Au', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 786, pp. 355-363. https://doi.org/10.1016/j.physletb.2018.10.005

TY - JOUR

T1 - Change in structure between the I = 1/2 states in 181Tl and 177,179Au

AU - Cubiss, J.G.

AU - Barzakh, A.E.

AU - Andreyev, A.N.

AU - Al Monthery, M.

AU - Althubiti, N.

AU - Andel, B.

AU - Antalic, S.

AU - Atanasov, D.

AU - Blaum, K.

AU - Cocolios, T.E.

AU - Day Goodacre, T.

AU - de Groote, R.P.

AU - de Roubin, A.

AU - Farooq-Smith, G.J.

AU - Fedorov, D.V.

AU - Fedosseev, V.N.

AU - Ferrer, R.

AU - Fink, D.A.

AU - Gaffney, L.P.

AU - Ghys, L.

AU - Gredley, A.

AU - Harding, R.D.

AU - Herfurth, F.

AU - Huyse, M.

AU - Imai, N.

AU - Joss, D.T.

AU - Köster, U.

AU - Kreim, S.

AU - Liberati, V.

AU - Lunney, D.

AU - Lynch, K.M.

AU - Manea, V.

AU - Marsh, B.A.

AU - Martinez Palenzuela, Y.

AU - Molkanov, P.L.

AU - Mosat, P.

AU - Neidherr, D.

AU - O'Neill, G.G.

AU - Page, R.D.

AU - Procter, T.J.

AU - Rapisarda, E.

AU - Rosenbusch, M.

AU - Rothe, S.

AU - Sandhu, K.

AU - Schweikhard, L.

AU - Seliverstov, M.D.

AU - Sels, S.

AU - Spagnoletti, P.

AU - Truesdale, V.L.

AU - Van Beveren, C.

AU - Van Duppen, P.

AU - Veinhard, M.

AU - Venhart, M.

AU - Veselský, M.

AU - Wearing, F.

AU - Welker, A.

AU - Wienholtz, F.

AU - Wolf, R.N.

AU - Zemlyanoy, S.G.

AU - Zuber, K.

PY - 2018/11/10

Y1 - 2018/11/10

N2 - The first accurate measurements of the α-decay branching ratio and half-life of the Iπ = 1/2+ ground state in 181Tl have been made, along with the first determination of the I = 1/2 magnetic moments and spin assignments of the ground states in 177,179Au. The results are discussed within the complementary systematics of the reduced α-decay widths and nuclear g factors of low-lying, Iπ = 1/2+ states in the neutron-deficient lead region. The findings shed light on the unexpected hindrance of the 1/2+ →1/2+, 181Tl9 → 177Aug α decay, which is explained by a mixing of π3s1/2 and π2d3/2 configurations in 177Aug, whilst 181Tlg remains a near-pureπ3s1/2. This conclusion is inferred from the g factor of 177Aug which has an intermediate value between those of π3s1/2 and π2d3/2 states. A similar mixed configuration is proposed for the Iπ = 1/2+ ground state of 179Au. This mixing may provide evidence for triaxial shapes in the ground states in these nuclei.

AB - The first accurate measurements of the α-decay branching ratio and half-life of the Iπ = 1/2+ ground state in 181Tl have been made, along with the first determination of the I = 1/2 magnetic moments and spin assignments of the ground states in 177,179Au. The results are discussed within the complementary systematics of the reduced α-decay widths and nuclear g factors of low-lying, Iπ = 1/2+ states in the neutron-deficient lead region. The findings shed light on the unexpected hindrance of the 1/2+ →1/2+, 181Tl9 → 177Aug α decay, which is explained by a mixing of π3s1/2 and π2d3/2 configurations in 177Aug, whilst 181Tlg remains a near-pureπ3s1/2. This conclusion is inferred from the g factor of 177Aug which has an intermediate value between those of π3s1/2 and π2d3/2 states. A similar mixed configuration is proposed for the Iπ = 1/2+ ground state of 179Au. This mixing may provide evidence for triaxial shapes in the ground states in these nuclei.

KW - nuclear physics

KW - decay spectroscopy

KW - laser spectroscopy

KW - nuclear deformation

KW - gold nuclei

KW - thallium nuclei

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85054875221&partnerID=MN8TOARS

U2 - 10.1016/j.physletb.2018.10.005

DO - 10.1016/j.physletb.2018.10.005

M3 - Article

SN - 0370-2693

VL - 786

SP - 355

EP - 363

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Change in structure between the I = 1/2 states in¹⁸¹Tl and ^177,179Au

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Keywords

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Change in structure between the I = 1/2 states in 181Tl and 177,179Au

Abstract

Keywords

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Change in structure between the I = 1/2 states in¹⁸¹Tl and ^177,179Au