In-beam gamma-ray spectroscopy of Po-190,Po-197

D. R. Wiseman; A. N. Andreyev; R. D. Page; M. B. Smith; I. G. Darby; S. Eeckhaudt; T. Grahn; P. T. Greenlees; P. Jones; R. Julin; S. Juutinen; H. Kettunen; M. Leino; A. -P. Leppaenen; M. Nyman; J. Pakarinen; P. Rahkila; M. Sandzelius; J. Saren; C. Scholey; J. Uusitalo

doi:10.1140/epja/i2007-10507-2

In-beam gamma-ray spectroscopy of Po-190,Po-197

D. R. Wiseman^*, A. N. Andreyev, R. D. Page, M. B. Smith, I. G. Darby, S. Eeckhaudt, T. Grahn, P. T. Greenlees, P. Jones, R. Julin, S. Juutinen, H. Kettunen, M. Leino, A. -P. Leppaenen, M. Nyman, J. Pakarinen, P. Rahkila, M. Sandzelius, J. Saren, C. ScholeyJ. Uusitalo

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

gamma-ray transitions in the neutron-deficient nuclei Po-190,Po-197 have been identified using the JUROGAM Ge detector array coupled to the RITU gas-filled separator and the GREAT spectrometer. The yrast band of Po-190 has been firmly established through gamma-gamma coincidences and extended up to a spin and parity of 14(+). It displays similar behaviour to its isotones Hg-186 and Pb-188 above the 4(+) level, thus confirming its prolate nature. In Po-197 the band built upon the 13/2(+) isomer has been extended up to a spin and parity of 33/2(+), while the non-yrast band has been observed for the first time. The behaviour of Po-197 is found to be similar to that of the nearby even-mass isotopes, which is consistent with the model in which the i(13/2) neutron is weakly coupled to the states in the even-even core.

Original language	English
Pages (from-to)	275-281
Number of pages	7
Journal	European physical journal A : Hadrons & Nuclei
Volume	34
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2007-10507-2
Publication status	Published - Dec 2007

Keywords

INTRUDER STATES
ONSET
HIGH-SPIN STATES
POLONIUM ISOTOPES
RITU
EXCITED-STATES
DEFORMATION
GREAT SPECTROMETER
DECAY
JYFL

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10.1140/epja/i2007-10507-2

Cite this

Wiseman, D. R., Andreyev, A. N., Page, R. D., Smith, M. B., Darby, I. G., Eeckhaudt, S., Grahn, T., Greenlees, P. T., Jones, P., Julin, R., Juutinen, S., Kettunen, H., Leino, M., Leppaenen, A. -P., Nyman, M., Pakarinen, J., Rahkila, P., Sandzelius, M., Saren, J., ... Uusitalo, J. (2007). In-beam gamma-ray spectroscopy of Po-190,Po-197. European physical journal A : Hadrons & Nuclei, 34(3), 275-281. https://doi.org/10.1140/epja/i2007-10507-2

@article{6617be68cc644fb080e1b64e494603ad,

title = "In-beam gamma-ray spectroscopy of Po-190,Po-197",

abstract = "gamma-ray transitions in the neutron-deficient nuclei Po-190,Po-197 have been identified using the JUROGAM Ge detector array coupled to the RITU gas-filled separator and the GREAT spectrometer. The yrast band of Po-190 has been firmly established through gamma-gamma coincidences and extended up to a spin and parity of 14(+). It displays similar behaviour to its isotones Hg-186 and Pb-188 above the 4(+) level, thus confirming its prolate nature. In Po-197 the band built upon the 13/2(+) isomer has been extended up to a spin and parity of 33/2(+), while the non-yrast band has been observed for the first time. The behaviour of Po-197 is found to be similar to that of the nearby even-mass isotopes, which is consistent with the model in which the i(13/2) neutron is weakly coupled to the states in the even-even core.",

keywords = "INTRUDER STATES, ONSET, HIGH-SPIN STATES, POLONIUM ISOTOPES, RITU, EXCITED-STATES, DEFORMATION, GREAT SPECTROMETER, DECAY, JYFL",

author = "Wiseman, {D. R.} and Andreyev, {A. N.} and Page, {R. D.} and Smith, {M. B.} and Darby, {I. G.} and S. Eeckhaudt and T. Grahn and Greenlees, {P. T.} and P. Jones and R. Julin and S. Juutinen and H. Kettunen and M. Leino and Leppaenen, {A. -P.} and M. Nyman and J. Pakarinen and P. Rahkila and M. Sandzelius and J. Saren and C. Scholey and J. Uusitalo",

year = "2007",

month = dec,

doi = "10.1140/epja/i2007-10507-2",

language = "English",

volume = "34",

pages = "275--281",

journal = "European Physical Journal A : Hadrons and Nuclei",

issn = "1434-6001",

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}

Wiseman, DR, Andreyev, AN, Page, RD, Smith, MB, Darby, IG, Eeckhaudt, S, Grahn, T, Greenlees, PT, Jones, P, Julin, R, Juutinen, S, Kettunen, H, Leino, M, Leppaenen, A-P, Nyman, M, Pakarinen, J, Rahkila, P, Sandzelius, M, Saren, J, Scholey, C & Uusitalo, J 2007, 'In-beam gamma-ray spectroscopy of Po-190,Po-197', European physical journal A : Hadrons & Nuclei, vol. 34, no. 3, pp. 275-281. https://doi.org/10.1140/epja/i2007-10507-2

TY - JOUR

T1 - In-beam gamma-ray spectroscopy of Po-190,Po-197

AU - Wiseman, D. R.

AU - Andreyev, A. N.

AU - Page, R. D.

AU - Smith, M. B.

AU - Darby, I. G.

AU - Eeckhaudt, S.

AU - Grahn, T.

AU - Greenlees, P. T.

AU - Jones, P.

AU - Julin, R.

AU - Juutinen, S.

AU - Kettunen, H.

AU - Leino, M.

AU - Leppaenen, A. -P.

AU - Nyman, M.

AU - Pakarinen, J.

AU - Rahkila, P.

AU - Sandzelius, M.

AU - Saren, J.

AU - Scholey, C.

AU - Uusitalo, J.

PY - 2007/12

Y1 - 2007/12

N2 - gamma-ray transitions in the neutron-deficient nuclei Po-190,Po-197 have been identified using the JUROGAM Ge detector array coupled to the RITU gas-filled separator and the GREAT spectrometer. The yrast band of Po-190 has been firmly established through gamma-gamma coincidences and extended up to a spin and parity of 14(+). It displays similar behaviour to its isotones Hg-186 and Pb-188 above the 4(+) level, thus confirming its prolate nature. In Po-197 the band built upon the 13/2(+) isomer has been extended up to a spin and parity of 33/2(+), while the non-yrast band has been observed for the first time. The behaviour of Po-197 is found to be similar to that of the nearby even-mass isotopes, which is consistent with the model in which the i(13/2) neutron is weakly coupled to the states in the even-even core.

AB - gamma-ray transitions in the neutron-deficient nuclei Po-190,Po-197 have been identified using the JUROGAM Ge detector array coupled to the RITU gas-filled separator and the GREAT spectrometer. The yrast band of Po-190 has been firmly established through gamma-gamma coincidences and extended up to a spin and parity of 14(+). It displays similar behaviour to its isotones Hg-186 and Pb-188 above the 4(+) level, thus confirming its prolate nature. In Po-197 the band built upon the 13/2(+) isomer has been extended up to a spin and parity of 33/2(+), while the non-yrast band has been observed for the first time. The behaviour of Po-197 is found to be similar to that of the nearby even-mass isotopes, which is consistent with the model in which the i(13/2) neutron is weakly coupled to the states in the even-even core.

KW - INTRUDER STATES

KW - ONSET

KW - HIGH-SPIN STATES

KW - POLONIUM ISOTOPES

KW - RITU

KW - EXCITED-STATES

KW - DEFORMATION

KW - GREAT SPECTROMETER

KW - DECAY

KW - JYFL

U2 - 10.1140/epja/i2007-10507-2

DO - 10.1140/epja/i2007-10507-2

M3 - Article

VL - 34

SP - 275

EP - 281

JO - European Physical Journal A : Hadrons and Nuclei

JF - European Physical Journal A : Hadrons and Nuclei

SN - 1434-6001

IS - 3

ER -