Prompt and delayed spectroscopy of199At

U. Jakobsson; J. Uusitalo; S. Juutinen; M. Leino; P. Nieminen; K. Andgren; B. Cederwall; P. T. Greenlees; B. Hadinia; P. Jones; R. Julin; S. Ketelhut; A. Khaplanov; M. Nyman; P. Peura; P. Rahkila; P. Ruotsalainen; M. Sandzelius; J. Sarén; C. Scholey; J. Sorri

doi:10.1103/PhysRevC.82.044302

Prompt and delayed spectroscopy of¹⁹⁹At

U. Jakobsson, J. Uusitalo, S. Juutinen, M. Leino, P. Nieminen, K. Andgren, B. Cederwall, P. T. Greenlees, B. Hadinia, P. Jones, R. Julin, S. Ketelhut, A. Khaplanov, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, M. Sandzelius, J. Sarén, C. ScholeyJ. Sorri

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Abstract

The neutron-deficient nucleus¹⁹⁹At has been studied through γ -ray and electron spectroscopy, using the recoil-decay tagging technique. Two experiments were conducted, using a gas-filled recoil separator with a focal-plane spectrometer alone and together with a germanium-detector array at the target position. The resulting level scheme for ¹⁹⁹At includes a new isomer with a half-life of 0.80(5) μs and a spin and parity of (29/2⁺). The 13/2⁺ isomer, which de-excites via an M2 transition to the 9/2^- ground state, was measured to have a half-life of 70(20) ns. Our earlier version of the level scheme for ¹⁹⁷At has been updated as well.

Original language	English
Article number	044302
Journal	Physical Review C - Nuclear Physics
Volume	82
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.82.044302
State	Published - 2010
Externally published	Yes

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Jakobsson, U., Uusitalo, J., Juutinen, S., Leino, M., Nieminen, P., Andgren, K., Cederwall, B., Greenlees, P. T., Hadinia, B., Jones, P., Julin, R., Ketelhut, S., Khaplanov, A., Nyman, M., Peura, P., Rahkila, P., Ruotsalainen, P., Sandzelius, M., Sarén, J., ... Sorri, J. (2010). Prompt and delayed spectroscopy of¹⁹⁹At. Physical Review C - Nuclear Physics, 82(4), Article 044302. https://doi.org/10.1103/PhysRevC.82.044302

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title = "Prompt and delayed spectroscopy of199At",

abstract = "The neutron-deficient nucleus199At has been studied through γ -ray and electron spectroscopy, using the recoil-decay tagging technique. Two experiments were conducted, using a gas-filled recoil separator with a focal-plane spectrometer alone and together with a germanium-detector array at the target position. The resulting level scheme for 199At includes a new isomer with a half-life of 0.80(5) μs and a spin and parity of (29/2+). The 13/2+ isomer, which de-excites via an M2 transition to the 9/2- ground state, was measured to have a half-life of 70(20) ns. Our earlier version of the level scheme for 197At has been updated as well.",

author = "U. Jakobsson and J. Uusitalo and S. Juutinen and M. Leino and P. Nieminen and K. Andgren and B. Cederwall and Greenlees, {P. T.} and B. Hadinia and P. Jones and R. Julin and S. Ketelhut and A. Khaplanov and M. Nyman and P. Peura and P. Rahkila and P. Ruotsalainen and M. Sandzelius and J. Sar{\'e}n and C. Scholey and J. Sorri",

year = "2010",

doi = "10.1103/PhysRevC.82.044302",

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journal = "Physical Review C - Nuclear Physics",

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Jakobsson, U, Uusitalo, J, Juutinen, S, Leino, M, Nieminen, P, Andgren, K, Cederwall, B, Greenlees, PT, Hadinia, B, Jones, P, Julin, R, Ketelhut, S, Khaplanov, A, Nyman, M, Peura, P, Rahkila, P, Ruotsalainen, P, Sandzelius, M, Sarén, J, Scholey, C & Sorri, J 2010, 'Prompt and delayed spectroscopy of¹⁹⁹At', Physical Review C - Nuclear Physics, vol. 82, no. 4, 044302. https://doi.org/10.1103/PhysRevC.82.044302

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T1 - Prompt and delayed spectroscopy of199At

AU - Jakobsson, U.

AU - Uusitalo, J.

AU - Juutinen, S.

AU - Leino, M.

AU - Nieminen, P.

AU - Andgren, K.

AU - Cederwall, B.

AU - Greenlees, P. T.

AU - Hadinia, B.

AU - Jones, P.

AU - Julin, R.

AU - Ketelhut, S.

AU - Khaplanov, A.

AU - Nyman, M.

AU - Peura, P.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sandzelius, M.

AU - Sarén, J.

AU - Scholey, C.

AU - Sorri, J.

PY - 2010

Y1 - 2010

N2 - The neutron-deficient nucleus199At has been studied through γ -ray and electron spectroscopy, using the recoil-decay tagging technique. Two experiments were conducted, using a gas-filled recoil separator with a focal-plane spectrometer alone and together with a germanium-detector array at the target position. The resulting level scheme for 199At includes a new isomer with a half-life of 0.80(5) μs and a spin and parity of (29/2+). The 13/2+ isomer, which de-excites via an M2 transition to the 9/2- ground state, was measured to have a half-life of 70(20) ns. Our earlier version of the level scheme for 197At has been updated as well.

AB - The neutron-deficient nucleus199At has been studied through γ -ray and electron spectroscopy, using the recoil-decay tagging technique. Two experiments were conducted, using a gas-filled recoil separator with a focal-plane spectrometer alone and together with a germanium-detector array at the target position. The resulting level scheme for 199At includes a new isomer with a half-life of 0.80(5) μs and a spin and parity of (29/2+). The 13/2+ isomer, which de-excites via an M2 transition to the 9/2- ground state, was measured to have a half-life of 70(20) ns. Our earlier version of the level scheme for 197At has been updated as well.

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VL - 82

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

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Prompt and delayed spectroscopy of¹⁹⁹At

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