Level structure above the 17+ isomeric state in 15269Tm83

B.S. Nara Singh; D.M. Cullen; M.J. Taylor; P.C. Srivastava; P. Van Isacker; O. Beeke; B. Dodson; David O'Donnell; U. Jakobson; T. Grahn; P.T. Greenlees; P.M. Jones; R. Julin; S. Khan; M. Leino; A.-P. Leppanen; S. Eeckhaudt; K. Mantyniemi; J. Pakarinen; P. Peura; P. Rahkila; J. Sarén; J. Sorri; J. Uusitalo; M. Venhart

doi:10.1103/PhysRevC.98.024319

Level structure above the 17+ isomeric state in 15269Tm83

B.S. Nara Singh^*, D.M. Cullen, M.J. Taylor, P.C. Srivastava, P. Van Isacker, O. Beeke, B. Dodson, David O'Donnell, U. Jakobson, T. Grahn, P.T. Greenlees, P.M. Jones, R. Julin, S. Khan, M. Leino, A.-P. Leppanen, S. Eeckhaudt, K. Mantyniemi, J. Pakarinen, P. PeuraP. Rahkila, J. Sarén, J. Sorri, J. Uusitalo, M. Venhart

^*Corresponding author for this work

School of Computing, Engineering and Physical Sciences

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Abstract

Excited states above the 17+ isomeric state in the proton-rich nucleus 152Tmwere established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π0h11/2 orbital and one neutron in the ν1f7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J=21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17+ level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.

Original language	English
Article number	024319
Number of pages	11
Journal	Physical Review C
Volume	98
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.98.024319
Publication status	Published - 28 Aug 2018

Keywords

electromagnetic transitions
isomer decays
lifetimes and widths
nuclear forces
nuclear spin and parity
shell model

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10.1103/PhysRevC.98.024319

2018 08 01 Nara Singh IsomericAccepted author manuscript, 674 KBLicence: CC BY-NC-ND

Nara Singh Bondili
- School of Computing, Engineering and Physical Sciences - Lecturer
Person: Academic

Cite this

Nara Singh, B. S., Cullen, D. M., Taylor, M. J., Srivastava, P. C., Van Isacker, P., Beeke, O., Dodson, B., O'Donnell, D., Jakobson, U., Grahn, T., Greenlees, P. T., Jones, P. M., Julin, R., Khan, S., Leino, M., Leppanen, A.-P., Eeckhaudt, S., Mantyniemi, K., Pakarinen, J., ... Venhart, M. (2018). Level structure above the 17+ isomeric state in 15269Tm83. Physical Review C, 98(2), Article 024319. https://doi.org/10.1103/PhysRevC.98.024319

@article{e219c00d7c0848a69b0f6324ed77a02a,

title = "Level structure above the 17+ isomeric state in 15269Tm83",

abstract = "Excited states above the 17+ isomeric state in the proton-rich nucleus 152Tmwere established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π0h11/2 orbital and one neutron in the ν1f7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J=21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17+ level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.",

keywords = "electromagnetic transitions, isomer decays, lifetimes and widths, nuclear forces, nuclear spin and parity, shell model",

author = "{Nara Singh}, B.S. and D.M. Cullen and M.J. Taylor and P.C. Srivastava and {Van Isacker}, P. and O. Beeke and B. Dodson and David O'Donnell and U. Jakobson and T. Grahn and P.T. Greenlees and P.M. Jones and R. Julin and S. Khan and M. Leino and A.-P. Leppanen and S. Eeckhaudt and K. Mantyniemi and J. Pakarinen and P. Peura and P. Rahkila and J. Sar{\'e}n and J. Sorri and J. Uusitalo and M. Venhart",

year = "2018",

month = aug,

day = "28",

doi = "10.1103/PhysRevC.98.024319",

language = "English",

volume = "98",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

Nara Singh, BS, Cullen, DM, Taylor, MJ, Srivastava, PC, Van Isacker, P, Beeke, O, Dodson, B, O'Donnell, D, Jakobson, U, Grahn, T, Greenlees, PT, Jones, PM, Julin, R, Khan, S, Leino, M, Leppanen, A-P, Eeckhaudt, S, Mantyniemi, K, Pakarinen, J, Peura, P, Rahkila, P, Sarén, J, Sorri, J, Uusitalo, J & Venhart, M 2018, 'Level structure above the 17+ isomeric state in 15269Tm83', Physical Review C, vol. 98, no. 2, 024319. https://doi.org/10.1103/PhysRevC.98.024319

TY - JOUR

T1 - Level structure above the 17+ isomeric state in 15269Tm83

AU - Nara Singh, B.S.

AU - Cullen, D.M.

AU - Taylor, M.J.

AU - Srivastava, P.C.

AU - Van Isacker, P.

AU - Beeke, O.

AU - Dodson, B.

AU - O'Donnell, David

AU - Jakobson, U.

AU - Grahn, T.

AU - Greenlees, P.T.

AU - Jones, P.M.

AU - Julin, R.

AU - Khan, S.

AU - Leino, M.

AU - Leppanen, A.-P.

AU - Eeckhaudt, S.

AU - Mantyniemi, K.

AU - Pakarinen, J.

AU - Peura, P.

AU - Rahkila, P.

AU - Sarén, J.

AU - Sorri, J.

AU - Uusitalo, J.

AU - Venhart, M.

PY - 2018/8/28

Y1 - 2018/8/28

N2 - Excited states above the 17+ isomeric state in the proton-rich nucleus 152Tmwere established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π0h11/2 orbital and one neutron in the ν1f7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J=21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17+ level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.

AB - Excited states above the 17+ isomeric state in the proton-rich nucleus 152Tmwere established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π0h11/2 orbital and one neutron in the ν1f7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J=21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17+ level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.

KW - electromagnetic transitions

KW - isomer decays

KW - lifetimes and widths

KW - nuclear forces

KW - nuclear spin and parity

KW - shell model

U2 - 10.1103/PhysRevC.98.024319

DO - 10.1103/PhysRevC.98.024319

M3 - Article

SN - 2469-9985

VL - 98

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - 024319

ER -

Level structure above the 17+ isomeric state in 15269Tm83

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Keywords

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