Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173

A. N. Andreyev; S. Antalic; D. Ackermann; T. E. Cocolios; V. F. Comas; J. Elseviers; S. Franchoo; S. Heinz; J. A. Heredia; F. P. Heßberger; S. Hofmann; M. Huyse; J. Khuyagbaatar; I. Kojouharov; B. Kindler; B. Lommel; R. Mann; R. D. Page; S. Rinta-Antila; P. J. Sapple; Š Šáro; P. Van Duppen; M. Venhart; H. V. Watkins

doi:10.1103/PhysRevC.80.024302

Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173

A. N. Andreyev, S. Antalic, D. Ackermann, T. E. Cocolios, V. F. Comas, J. Elseviers, S. Franchoo, S. Heinz, J. A. Heredia, F. P. Heßberger, S. Hofmann, M. Huyse, J. Khuyagbaatar, I. Kojouharov, B. Kindler, B. Lommel, R. Mann, R. D. Page, S. Rinta-Antila, P. J. SappleŠ Šáro, P. Van Duppen, M. Venhart, H. V. Watkins

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Abstract

A detailed spectroscopic study of the neutron-deficient isotope Tl181 and the daughter of its α decay, Au177, has been performed in the complete fusion reaction Ca40+Sm144→Pb184* at the velocity filter SHIP (GSI). The mass excess, excitation energy, and decay scheme of the isomeric 1.40(3) ms, 9/2- intruder state in Tl181 have been established for the first time. These results solve a long-standing puzzle of the unrealistically large reduced α-decay width of this isomer. Based on this, the previously unknown masses of the long-lived isomeric states in Au177 and Ir173 have been derived. In turn, it now allows the excitation energies of previously identified bands in Au177 and Ir173 to be deduced and compared with theoretical predictions. First measurements of α-decay branching ratios for Tl181m and Au177m,g are also reported. © 2009 The American Physical Society.

Original language	English
Article number	024302
Journal	Physical Review C - Nuclear Physics
Volume	80
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.80.024302
Publication status	Published - 4 Aug 2009

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Andreyev, A. N., Antalic, S., Ackermann, D., Cocolios, T. E., Comas, V. F., Elseviers, J., Franchoo, S., Heinz, S., Heredia, J. A., Heßberger, F. P., Hofmann, S., Huyse, M., Khuyagbaatar, J., Kojouharov, I., Kindler, B., Lommel, B., Mann, R., Page, R. D., Rinta-Antila, S., ... Watkins, H. V. (2009). Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173. Physical Review C - Nuclear Physics, 80(2), Article 024302. https://doi.org/10.1103/PhysRevC.80.024302

@article{0a17186e825f467db714c20e6dd2fd69,

title = "Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173",

abstract = "A detailed spectroscopic study of the neutron-deficient isotope Tl181 and the daughter of its α decay, Au177, has been performed in the complete fusion reaction Ca40+Sm144→Pb184* at the velocity filter SHIP (GSI). The mass excess, excitation energy, and decay scheme of the isomeric 1.40(3) ms, 9/2- intruder state in Tl181 have been established for the first time. These results solve a long-standing puzzle of the unrealistically large reduced α-decay width of this isomer. Based on this, the previously unknown masses of the long-lived isomeric states in Au177 and Ir173 have been derived. In turn, it now allows the excitation energies of previously identified bands in Au177 and Ir173 to be deduced and compared with theoretical predictions. First measurements of α-decay branching ratios for Tl181m and Au177m,g are also reported. {\textcopyright} 2009 The American Physical Society.",

author = "Andreyev, {A. N.} and S. Antalic and D. Ackermann and Cocolios, {T. E.} and Comas, {V. F.} and J. Elseviers and S. Franchoo and S. Heinz and Heredia, {J. A.} and He{\ss}berger, {F. P.} and S. Hofmann and M. Huyse and J. Khuyagbaatar and I. Kojouharov and B. Kindler and B. Lommel and R. Mann and Page, {R. D.} and S. Rinta-Antila and Sapple, {P. J.} and {\v S} {\v S}{\'a}ro and Duppen, {P. Van} and M. Venhart and Watkins, {H. V.}",

year = "2009",

month = aug,

day = "4",

doi = "10.1103/PhysRevC.80.024302",

language = "English",

volume = "80",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "2",

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Andreyev, AN, Antalic, S, Ackermann, D, Cocolios, TE, Comas, VF, Elseviers, J, Franchoo, S, Heinz, S, Heredia, JA, Heßberger, FP, Hofmann, S, Huyse, M, Khuyagbaatar, J, Kojouharov, I, Kindler, B, Lommel, B, Mann, R, Page, RD, Rinta-Antila, S, Sapple, PJ, Šáro, Š, Duppen, PV, Venhart, M & Watkins, HV 2009, 'Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173', Physical Review C - Nuclear Physics, vol. 80, no. 2, 024302. https://doi.org/10.1103/PhysRevC.80.024302

TY - JOUR

T1 - Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173

AU - Andreyev, A. N.

AU - Antalic, S.

AU - Ackermann, D.

AU - Cocolios, T. E.

AU - Comas, V. F.

AU - Elseviers, J.

AU - Franchoo, S.

AU - Heinz, S.

AU - Heredia, J. A.

AU - Heßberger, F. P.

AU - Hofmann, S.

AU - Huyse, M.

AU - Khuyagbaatar, J.

AU - Kojouharov, I.

AU - Kindler, B.

AU - Lommel, B.

AU - Mann, R.

AU - Page, R. D.

AU - Rinta-Antila, S.

AU - Sapple, P. J.

AU - Šáro, Š

AU - Duppen, P. Van

AU - Venhart, M.

AU - Watkins, H. V.

PY - 2009/8/4

Y1 - 2009/8/4

N2 - A detailed spectroscopic study of the neutron-deficient isotope Tl181 and the daughter of its α decay, Au177, has been performed in the complete fusion reaction Ca40+Sm144→Pb184* at the velocity filter SHIP (GSI). The mass excess, excitation energy, and decay scheme of the isomeric 1.40(3) ms, 9/2- intruder state in Tl181 have been established for the first time. These results solve a long-standing puzzle of the unrealistically large reduced α-decay width of this isomer. Based on this, the previously unknown masses of the long-lived isomeric states in Au177 and Ir173 have been derived. In turn, it now allows the excitation energies of previously identified bands in Au177 and Ir173 to be deduced and compared with theoretical predictions. First measurements of α-decay branching ratios for Tl181m and Au177m,g are also reported. © 2009 The American Physical Society.

AB - A detailed spectroscopic study of the neutron-deficient isotope Tl181 and the daughter of its α decay, Au177, has been performed in the complete fusion reaction Ca40+Sm144→Pb184* at the velocity filter SHIP (GSI). The mass excess, excitation energy, and decay scheme of the isomeric 1.40(3) ms, 9/2- intruder state in Tl181 have been established for the first time. These results solve a long-standing puzzle of the unrealistically large reduced α-decay width of this isomer. Based on this, the previously unknown masses of the long-lived isomeric states in Au177 and Ir173 have been derived. In turn, it now allows the excitation energies of previously identified bands in Au177 and Ir173 to be deduced and compared with theoretical predictions. First measurements of α-decay branching ratios for Tl181m and Au177m,g are also reported. © 2009 The American Physical Society.

U2 - 10.1103/PhysRevC.80.024302

DO - 10.1103/PhysRevC.80.024302

M3 - Article

SN - 0556-2813

VL - 80

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

M1 - 024302

ER -

Decay of the 9/2- isomer in Tl181 and mass determination of low-lying states in Tl181, Au177, and Ir173

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