Spectroscopy of the neutron-deficient nucleus Os-167(91)

D. O'Donnell, T. Grahn, D. T. Joss, J. Simpson, C. Scholey, K. Andgren, L. Bianco, B. Cederwall, D. M. Cullen, A. Dewald, E. Ganioglu, M. B. Gomez Hornillos, P. T. Greenlees, B. Hadinia, H. Iwasaki, U. Jakobsson, J. Jolie, P. Jones, D. S. Judson, R. Julin & 26 others S. Juutinen, S. Ketelhut, M. Labiche, M. Leino, N. M. Lumley, P. J. R. Mason, O. Möller, P. Nieminen, M. Nyman, R. D. Page, J. Pakarinen, E. S. Paul, M. Petri, A. Petts, P. Peura, N. Pietralla, Th. Pissulla, P. Rahkila, P. Ruotsalainen, M. Sandzelius, P. J. Sapple, J. Saren, J. Sorri, J. Thomson, J. Uusitalo, H. V. Watkins

Research output: Contribution to journalArticle

Abstract

Excited states of the nucleus 167Os have been populated by the reaction 92Mo(78Kr,2pn). The JUROGAM γ-ray detector array has been used in conjunction with the RITU gas-filled separator and the GREAT spectrometer to observe prompt γ rays in coincidence with recoiling fusion-evaporation residues and their subsequent decay by α particle emission. By correlating prompt γ radiation with the characteristic α radioactivity of 167Os, it has been possible to extend the level scheme for this nucleus significantly. In particular, an extension of the yrast band and four previously unobserved bands are reported. In addition, the recoil distance Doppler-shift method was used to determine a lifetime of τ=20(4) ps for The Iπ=17/2+ state in 167Os. Hence, the level of collectivity and magnitude of deformation of the low spin yrast band of this nucleus is established.
Original languageEnglish
Article number064309
JournalPhysical Review C
Volume79
Issue number6
DOIs
Publication statusPublished - 10 Jun 2009
Externally publishedYes

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neutrons
nuclei
rays
spectroscopy
recoilings
particle emission
separators
radioactivity
fusion
evaporation
spectrometers
life (durability)
shift
detectors
decay
radiation
gases
excitation

Cite this

O'Donnell, D., Grahn, T., Joss, D. T., Simpson, J., Scholey, C., Andgren, K., ... Watkins, H. V. (2009). Spectroscopy of the neutron-deficient nucleus Os-167(91). Physical Review C, 79(6), [064309]. https://doi.org/10.1103/PhysRevC.79.064309
O'Donnell, D. ; Grahn, T. ; Joss, D. T. ; Simpson, J. ; Scholey, C. ; Andgren, K. ; Bianco, L. ; Cederwall, B. ; Cullen, D. M. ; Dewald, A. ; Ganioglu, E. ; Hornillos, M. B. Gomez ; Greenlees, P. T. ; Hadinia, B. ; Iwasaki, H. ; Jakobsson, U. ; Jolie, J. ; Jones, P. ; Judson, D. S. ; Julin, R. ; Juutinen, S. ; Ketelhut, S. ; Labiche, M. ; Leino, M. ; Lumley, N. M. ; Mason, P. J. R. ; Möller, O. ; Nieminen, P. ; Nyman, M. ; Page, R. D. ; Pakarinen, J. ; Paul, E. S. ; Petri, M. ; Petts, A. ; Peura, P. ; Pietralla, N. ; Pissulla, Th. ; Rahkila, P. ; Ruotsalainen, P. ; Sandzelius, M. ; Sapple, P. J. ; Saren, J. ; Sorri, J. ; Thomson, J. ; Uusitalo, J. ; Watkins, H. V. / Spectroscopy of the neutron-deficient nucleus Os-167(91). In: Physical Review C. 2009 ; Vol. 79, No. 6.
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abstract = "Excited states of the nucleus 167Os have been populated by the reaction 92Mo(78Kr,2pn). The JUROGAM γ-ray detector array has been used in conjunction with the RITU gas-filled separator and the GREAT spectrometer to observe prompt γ rays in coincidence with recoiling fusion-evaporation residues and their subsequent decay by α particle emission. By correlating prompt γ radiation with the characteristic α radioactivity of 167Os, it has been possible to extend the level scheme for this nucleus significantly. In particular, an extension of the yrast band and four previously unobserved bands are reported. In addition, the recoil distance Doppler-shift method was used to determine a lifetime of τ=20(4) ps for The Iπ=17/2+ state in 167Os. Hence, the level of collectivity and magnitude of deformation of the low spin yrast band of this nucleus is established.",
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O'Donnell, D, Grahn, T, Joss, DT, Simpson, J, Scholey, C, Andgren, K, Bianco, L, Cederwall, B, Cullen, DM, Dewald, A, Ganioglu, E, Hornillos, MBG, Greenlees, PT, Hadinia, B, Iwasaki, H, Jakobsson, U, Jolie, J, Jones, P, Judson, DS, Julin, R, Juutinen, S, Ketelhut, S, Labiche, M, Leino, M, Lumley, NM, Mason, PJR, Möller, O, Nieminen, P, Nyman, M, Page, RD, Pakarinen, J, Paul, ES, Petri, M, Petts, A, Peura, P, Pietralla, N, Pissulla, T, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sapple, PJ, Saren, J, Sorri, J, Thomson, J, Uusitalo, J & Watkins, HV 2009, 'Spectroscopy of the neutron-deficient nucleus Os-167(91)' Physical Review C, vol. 79, no. 6, 064309. https://doi.org/10.1103/PhysRevC.79.064309

Spectroscopy of the neutron-deficient nucleus Os-167(91). / O'Donnell, D.; Grahn, T.; Joss, D. T.; Simpson, J.; Scholey, C.; Andgren, K.; Bianco, L.; Cederwall, B.; Cullen, D. M.; Dewald, A.; Ganioglu, E.; Hornillos, M. B. Gomez; Greenlees, P. T.; Hadinia, B.; Iwasaki, H.; Jakobsson, U.; Jolie, J.; Jones, P.; Judson, D. S.; Julin, R.; Juutinen, S.; Ketelhut, S.; Labiche, M.; Leino, M.; Lumley, N. M.; Mason, P. J. R.; Möller, O.; Nieminen, P.; Nyman, M.; Page, R. D.; Pakarinen, J.; Paul, E. S.; Petri, M.; Petts, A.; Peura, P.; Pietralla, N.; Pissulla, Th.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sapple, P. J.; Saren, J.; Sorri, J.; Thomson, J.; Uusitalo, J.; Watkins, H. V.

In: Physical Review C, Vol. 79, No. 6, 064309, 10.06.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Spectroscopy of the neutron-deficient nucleus Os-167(91)

AU - O'Donnell, D.

AU - Grahn, T.

AU - Joss, D. T.

AU - Simpson, J.

AU - Scholey, C.

AU - Andgren, K.

AU - Bianco, L.

AU - Cederwall, B.

AU - Cullen, D. M.

AU - Dewald, A.

AU - Ganioglu, E.

AU - Hornillos, M. B. Gomez

AU - Greenlees, P. T.

AU - Hadinia, B.

AU - Iwasaki, H.

AU - Jakobsson, U.

AU - Jolie, J.

AU - Jones, P.

AU - Judson, D. S.

AU - Julin, R.

AU - Juutinen, S.

AU - Ketelhut, S.

AU - Labiche, M.

AU - Leino, M.

AU - Lumley, N. M.

AU - Mason, P. J. R.

AU - Möller, O.

AU - Nieminen, P.

AU - Nyman, M.

AU - Page, R. D.

AU - Pakarinen, J.

AU - Paul, E. S.

AU - Petri, M.

AU - Petts, A.

AU - Peura, P.

AU - Pietralla, N.

AU - Pissulla, Th.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sapple, P. J.

AU - Saren, J.

AU - Sorri, J.

AU - Thomson, J.

AU - Uusitalo, J.

AU - Watkins, H. V.

PY - 2009/6/10

Y1 - 2009/6/10

N2 - Excited states of the nucleus 167Os have been populated by the reaction 92Mo(78Kr,2pn). The JUROGAM γ-ray detector array has been used in conjunction with the RITU gas-filled separator and the GREAT spectrometer to observe prompt γ rays in coincidence with recoiling fusion-evaporation residues and their subsequent decay by α particle emission. By correlating prompt γ radiation with the characteristic α radioactivity of 167Os, it has been possible to extend the level scheme for this nucleus significantly. In particular, an extension of the yrast band and four previously unobserved bands are reported. In addition, the recoil distance Doppler-shift method was used to determine a lifetime of τ=20(4) ps for The Iπ=17/2+ state in 167Os. Hence, the level of collectivity and magnitude of deformation of the low spin yrast band of this nucleus is established.

AB - Excited states of the nucleus 167Os have been populated by the reaction 92Mo(78Kr,2pn). The JUROGAM γ-ray detector array has been used in conjunction with the RITU gas-filled separator and the GREAT spectrometer to observe prompt γ rays in coincidence with recoiling fusion-evaporation residues and their subsequent decay by α particle emission. By correlating prompt γ radiation with the characteristic α radioactivity of 167Os, it has been possible to extend the level scheme for this nucleus significantly. In particular, an extension of the yrast band and four previously unobserved bands are reported. In addition, the recoil distance Doppler-shift method was used to determine a lifetime of τ=20(4) ps for The Iπ=17/2+ state in 167Os. Hence, the level of collectivity and magnitude of deformation of the low spin yrast band of this nucleus is established.

U2 - 10.1103/PhysRevC.79.064309

DO - 10.1103/PhysRevC.79.064309

M3 - Article

VL - 79

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 6

M1 - 064309

ER -

O'Donnell D, Grahn T, Joss DT, Simpson J, Scholey C, Andgren K et al. Spectroscopy of the neutron-deficient nucleus Os-167(91). Physical Review C. 2009 Jun 10;79(6). 064309. https://doi.org/10.1103/PhysRevC.79.064309