Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220

Greg Henning; T. L. Khoo; A. Lopez-Martens; D. Seweryniak; M. Alcorta; M. Asai; B. B. Back; P. F. Bertone; D. Boilley; M. P. Carpenter; C. J. Chiara; P. Chowdhury; B. Gall; P. T. Greenlees; G. Gürdal; K. Hauschild; A. Heinz; C. R. Hoffman; R. V.F. Janssens; A. V. Karpov; B. P. Kay; F. G. Kondev; S. Lakshmi; T. Lauritsen; C. J. Lister; E. A. McCutchan; C. Nair; J. Piot; D. Potterveld; P. Reiter; A. M. Rogers; N. Rowley; S. Zhu

doi:10.1103/PhysRevLett.113.262505

Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220

Greg Henning, T. L. Khoo, A. Lopez-Martens, D. Seweryniak, M. Alcorta, M. Asai, B. B. Back, P. F. Bertone, D. Boilley, M. P. Carpenter, C. J. Chiara, P. Chowdhury, B. Gall, P. T. Greenlees, G. Gürdal, K. Hauschild, A. Heinz, C. R. Hoffman, R. V.F. Janssens, A. V. KarpovB. P. Kay, F. G. Kondev, S. Lakshmi, T. Lauritsen, C. J. Lister, E. A. McCutchan, C. Nair, J. Piot, D. Potterveld, P. Reiter, A. M. Rogers, N. Rowley, S. Zhu

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Abstract

We report on the first measurement of the fission barrier height in a heavy shell-stabilized nucleus. The fission barrier height of No254 is measured to be Bf=6.0±0.5 MeV at spin 15 and, by extrapolation, Bf=6.6±0.9 MeV at spin 0. This information is deduced from the measured distribution of entry points in the excitation energy versus spin plane. The same measurement is performed for Th220 and only a lower limit of the fission barrier height can be determined: Bf(I)>8 MeV. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.

Original language	English
Article number	262505
Journal	Physical review letters
Volume	113
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.113.262505
Publication status	Published - Dec 30 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.113.262505

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Henning, G., Khoo, T. L., Lopez-Martens, A., Seweryniak, D., Alcorta, M., Asai, M., Back, B. B., Bertone, P. F., Boilley, D., Carpenter, M. P., Chiara, C. J., Chowdhury, P., Gall, B., Greenlees, P. T., Gürdal, G., Hauschild, K., Heinz, A., Hoffman, C. R., Janssens, R. V. F., ... Zhu, S. (2014). Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220. Physical review letters, 113(26), Article 262505. https://doi.org/10.1103/PhysRevLett.113.262505

Henning, G, Khoo, TL, Lopez-Martens, A, Seweryniak, D, Alcorta, M, Asai, M, Back, BB, Bertone, PF, Boilley, D, Carpenter, MP, Chiara, CJ, Chowdhury, P, Gall, B, Greenlees, PT, Gürdal, G, Hauschild, K, Heinz, A, Hoffman, CR, Janssens, RVF, Karpov, AV, Kay, BP, Kondev, FG, Lakshmi, S, Lauritsen, T, Lister, CJ, McCutchan, EA, Nair, C, Piot, J, Potterveld, D, Reiter, P, Rogers, AM, Rowley, N & Zhu, S 2014, 'Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220', Physical review letters, vol. 113, no. 26, 262505. https://doi.org/10.1103/PhysRevLett.113.262505

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title = "Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220",

abstract = "We report on the first measurement of the fission barrier height in a heavy shell-stabilized nucleus. The fission barrier height of No254 is measured to be Bf=6.0±0.5 MeV at spin 15 and, by extrapolation, Bf=6.6±0.9 MeV at spin 0. This information is deduced from the measured distribution of entry points in the excitation energy versus spin plane. The same measurement is performed for Th220 and only a lower limit of the fission barrier height can be determined: Bf(I)>8 MeV. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.",

author = "Greg Henning and Khoo, {T. L.} and A. Lopez-Martens and D. Seweryniak and M. Alcorta and M. Asai and Back, {B. B.} and Bertone, {P. F.} and D. Boilley and Carpenter, {M. P.} and Chiara, {C. J.} and P. Chowdhury and B. Gall and Greenlees, {P. T.} and G. G{\"u}rdal and K. Hauschild and A. Heinz and Hoffman, {C. R.} and Janssens, {R. V.F.} and Karpov, {A. V.} and Kay, {B. P.} and Kondev, {F. G.} and S. Lakshmi and T. Lauritsen and Lister, {C. J.} and McCutchan, {E. A.} and C. Nair and J. Piot and D. Potterveld and P. Reiter and Rogers, {A. M.} and N. Rowley and S. Zhu",

note = "Publisher Copyright: {\textcopyright} 2014 American Physical Society.",

year = "2014",

month = dec,

day = "30",

doi = "10.1103/PhysRevLett.113.262505",

language = "English",

volume = "113",

journal = "Physical review letters",

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T1 - Fission barrier of superheavy nuclei and persistence of shell effects at high spin

T2 - Cases of No 254 and Th 220

AU - Henning, Greg

AU - Khoo, T. L.

AU - Lopez-Martens, A.

AU - Seweryniak, D.

AU - Alcorta, M.

AU - Asai, M.

AU - Back, B. B.

AU - Bertone, P. F.

AU - Boilley, D.

AU - Carpenter, M. P.

AU - Chiara, C. J.

AU - Chowdhury, P.

AU - Gall, B.

AU - Greenlees, P. T.

AU - Gürdal, G.

AU - Hauschild, K.

AU - Heinz, A.

AU - Hoffman, C. R.

AU - Janssens, R. V.F.

AU - Karpov, A. V.

AU - Kay, B. P.

AU - Kondev, F. G.

AU - Lakshmi, S.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - McCutchan, E. A.

AU - Nair, C.

AU - Piot, J.

AU - Potterveld, D.

AU - Reiter, P.

AU - Rogers, A. M.

AU - Rowley, N.

AU - Zhu, S.

PY - 2014/12/30

Y1 - 2014/12/30

N2 - We report on the first measurement of the fission barrier height in a heavy shell-stabilized nucleus. The fission barrier height of No254 is measured to be Bf=6.0±0.5 MeV at spin 15 and, by extrapolation, Bf=6.6±0.9 MeV at spin 0. This information is deduced from the measured distribution of entry points in the excitation energy versus spin plane. The same measurement is performed for Th220 and only a lower limit of the fission barrier height can be determined: Bf(I)>8 MeV. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.

AB - We report on the first measurement of the fission barrier height in a heavy shell-stabilized nucleus. The fission barrier height of No254 is measured to be Bf=6.0±0.5 MeV at spin 15 and, by extrapolation, Bf=6.6±0.9 MeV at spin 0. This information is deduced from the measured distribution of entry points in the excitation energy versus spin plane. The same measurement is performed for Th220 and only a lower limit of the fission barrier height can be determined: Bf(I)>8 MeV. Comparisons with theoretical fission barriers test theories that predict properties of superheavy elements.

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JO - Physical review letters

JF - Physical review letters

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ER -

Fission barrier of superheavy nuclei and persistence of shell effects at high spin: Cases of No 254 and Th 220

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