Detailed spectroscopy of 195Bi

A. Herzáň; S. Juutinen; K. Auranen; T. Grahn; P. T. Greenlees; K. Hauschild; U. Jakobsson; R. Julin; S. Ketelhut; M. Leino; A. Lopez-Martens; Tom Lönnroth; P. Nieminen; M. Nyman; J. Partanen; P. Peura; P. Rahkila; P. Ruotsalainen; M. Sandzelius; J. Sarén; C. Scholey; Joakim Slotte; J. Sorri; S. Stolze; J. Uusitalo

doi:10.1103/PhysRevC.96.014301

Detailed spectroscopy of 195Bi

A. Herzáň, S. Juutinen, K. Auranen, T. Grahn, P. T. Greenlees, K. Hauschild, U. Jakobsson, R. Julin, S. Ketelhut, M. Leino, A. Lopez-Martens, Tom Lönnroth, P. Nieminen, M. Nyman, J. Partanen, P. Peura, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. SarénC. Scholey, Joakim Slotte, J. Sorri, S. Stolze, J. Uusitalo

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Abstract

An experiment focused on the study of shape coexistence and new high-spin structures in 195Bi has been performed. The nucleus is in a transitional region of the bismuth isotope chain. A large number of new states have been found, resulting in a significant extension of the previously known level scheme. Several new collective structures have been identified. A strongly coupled rotational band built upon the 13/2+ isomeric state was extended up to Iπ=(49/2+) and an energy of 5706 keV. The Iπ=31/2+ member of the πi13/2 band was also found to feed a new long-lived isomeric state with an excitation energy of 2616 keV and a spin and parity of Iπ=29/2+. The half-life of the 29/2+ isomeric state was determined to be 1.49(1)μs. It decays via the emission of 457-keV E2 and 236-keV E1 transitions, respectively. A low-energy 46-keV E2 transition has been identified to depopulate the (29/2−) isomeric state, with a measured half-life of T1/2=614(5)ns. This transition allows the excitation energy of the isomeric state to be determined as 2381 keV. The feeding patterns of both 29/2+ and (29/2−) isomeric states have also been described. This is the first time collective structures have also been observed up to high spins and excitation energies in the neutron-deficient 195Bi nucleus. Evidence for the manifestation of shape coexistence in 195Bi is also discussed.

Original language	Undefined/Unknown
Pages (from-to)	–
Journal	Physical Review C - Nuclear Physics
Volume	96
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.96.014301
Publication status	Published - 2017
MoE publication type	A1 Journal article-refereed

Keywords

NUCLEAR

Access to Document

10.1103/PhysRevC.96.014301

https://doi.org/10.1103/PhysRevC.96.014301

Cite this

Herzáň, A., Juutinen, S., Auranen, K., Grahn, T., T. Greenlees, P., Hauschild, K., Jakobsson, U., Julin, R., Ketelhut, S., Leino, M., Lopez-Martens, A., Lönnroth, T., Nieminen, P., Nyman, M., Partanen, J., Peura, P., Rahkila, P., Ruotsalainen, P., Sandzelius, M., ... Uusitalo, J. (2017). Detailed spectroscopy of 195Bi. Physical Review C - Nuclear Physics, 96(1), –. https://doi.org/10.1103/PhysRevC.96.014301

@article{1dbee7e883534680a01a95fbcdc04359,

title = "Detailed spectroscopy of 195Bi",

abstract = "An experiment focused on the study of shape coexistence and new high-spin structures in 195Bi has been performed. The nucleus is in a transitional region of the bismuth isotope chain. A large number of new states have been found, resulting in a significant extension of the previously known level scheme. Several new collective structures have been identified. A strongly coupled rotational band built upon the 13/2+ isomeric state was extended up to Iπ=(49/2+) and an energy of 5706 keV. The Iπ=31/2+ member of the πi13/2 band was also found to feed a new long-lived isomeric state with an excitation energy of 2616 keV and a spin and parity of Iπ=29/2+. The half-life of the 29/2+ isomeric state was determined to be 1.49(1)μs. It decays via the emission of 457-keV E2 and 236-keV E1 transitions, respectively. A low-energy 46-keV E2 transition has been identified to depopulate the (29/2−) isomeric state, with a measured half-life of T1/2=614(5)ns. This transition allows the excitation energy of the isomeric state to be determined as 2381 keV. The feeding patterns of both 29/2+ and (29/2−) isomeric states have also been described. This is the first time collective structures have also been observed up to high spins and excitation energies in the neutron-deficient 195Bi nucleus. Evidence for the manifestation of shape coexistence in 195Bi is also discussed.",

keywords = "NUCLEAR, NUCLEAR, NUCLEAR",

author = "A. Herz{\'a}{\v n} and S. Juutinen and K. Auranen and T. Grahn and {T. Greenlees}, P. and K. Hauschild and U. Jakobsson and R. Julin and S. Ketelhut and M. Leino and A. Lopez-Martens and Tom L{\"o}nnroth and P. Nieminen and M. Nyman and J. Partanen and P. Peura and P. Rahkila and P. Ruotsalainen and M. Sandzelius and J. Sar{\'e}n and C. Scholey and Joakim Slotte and J. Sorri and S. Stolze and J. Uusitalo",

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doi = "10.1103/PhysRevC.96.014301",

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Herzáň, A, Juutinen, S, Auranen, K, Grahn, T, T. Greenlees, P, Hauschild, K, Jakobsson, U, Julin, R, Ketelhut, S, Leino, M, Lopez-Martens, A, Lönnroth, T, Nieminen, P, Nyman, M, Partanen, J, Peura, P, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sarén, J, Scholey, C, Slotte, J, Sorri, J, Stolze, S & Uusitalo, J 2017, 'Detailed spectroscopy of 195Bi', Physical Review C - Nuclear Physics, vol. 96, no. 1, pp. –. https://doi.org/10.1103/PhysRevC.96.014301

TY - JOUR

T1 - Detailed spectroscopy of 195Bi

AU - Herzáň, A.

AU - Juutinen, S.

AU - Auranen, K.

AU - Grahn, T.

AU - T. Greenlees, P.

AU - Hauschild, K.

AU - Jakobsson, U.

AU - Julin, R.

AU - Ketelhut, S.

AU - Leino, M.

AU - Lopez-Martens, A.

AU - Lönnroth, Tom

AU - Nieminen, P.

AU - Nyman, M.

AU - Partanen, J.

AU - Peura, P.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sarén, J.

AU - Scholey, C.

AU - Slotte, Joakim

AU - Sorri, J.

AU - Stolze, S.

AU - Uusitalo, J.

PY - 2017

Y1 - 2017

N2 - An experiment focused on the study of shape coexistence and new high-spin structures in 195Bi has been performed. The nucleus is in a transitional region of the bismuth isotope chain. A large number of new states have been found, resulting in a significant extension of the previously known level scheme. Several new collective structures have been identified. A strongly coupled rotational band built upon the 13/2+ isomeric state was extended up to Iπ=(49/2+) and an energy of 5706 keV. The Iπ=31/2+ member of the πi13/2 band was also found to feed a new long-lived isomeric state with an excitation energy of 2616 keV and a spin and parity of Iπ=29/2+. The half-life of the 29/2+ isomeric state was determined to be 1.49(1)μs. It decays via the emission of 457-keV E2 and 236-keV E1 transitions, respectively. A low-energy 46-keV E2 transition has been identified to depopulate the (29/2−) isomeric state, with a measured half-life of T1/2=614(5)ns. This transition allows the excitation energy of the isomeric state to be determined as 2381 keV. The feeding patterns of both 29/2+ and (29/2−) isomeric states have also been described. This is the first time collective structures have also been observed up to high spins and excitation energies in the neutron-deficient 195Bi nucleus. Evidence for the manifestation of shape coexistence in 195Bi is also discussed.

AB - An experiment focused on the study of shape coexistence and new high-spin structures in 195Bi has been performed. The nucleus is in a transitional region of the bismuth isotope chain. A large number of new states have been found, resulting in a significant extension of the previously known level scheme. Several new collective structures have been identified. A strongly coupled rotational band built upon the 13/2+ isomeric state was extended up to Iπ=(49/2+) and an energy of 5706 keV. The Iπ=31/2+ member of the πi13/2 band was also found to feed a new long-lived isomeric state with an excitation energy of 2616 keV and a spin and parity of Iπ=29/2+. The half-life of the 29/2+ isomeric state was determined to be 1.49(1)μs. It decays via the emission of 457-keV E2 and 236-keV E1 transitions, respectively. A low-energy 46-keV E2 transition has been identified to depopulate the (29/2−) isomeric state, with a measured half-life of T1/2=614(5)ns. This transition allows the excitation energy of the isomeric state to be determined as 2381 keV. The feeding patterns of both 29/2+ and (29/2−) isomeric states have also been described. This is the first time collective structures have also been observed up to high spins and excitation energies in the neutron-deficient 195Bi nucleus. Evidence for the manifestation of shape coexistence in 195Bi is also discussed.

KW - NUCLEAR

U2 - 10.1103/PhysRevC.96.014301

DO - 10.1103/PhysRevC.96.014301

M3 - Artikel

SN - 0556-2813

VL - 96

SP - –

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 1

ER -