Spectroscopy along flerovium decay chains. II. Fine structure in odd-<i>A</i> <sup>289</sup>Fl

Cox, D. M.; Såmark-Roth, A.; Rudolph, D.; Sarmiento, L. G.; Clark, R. M.; Egido, J. L.; Golubev, P.; Heery, J.; Yakushev, A.; Åberg, S.; Albers, H. M.; Albertsson, M.; Block, M.; Brand, H.; Calverley, T.; Cantemir, R.; Carlsson, B. G.; Düllmann, Ch. E.; Eberth, J.; Fahlander, C.; Forsberg, U.; Gates, J. M.; Giacoppo, F.; Götz, M.; Götz, S.; Herzberg, R.-D.; Hrabar, Y.; Jäger, E.; Judson, D.; Khuyagbaatar, J.; Kindler, B.; Kojouharov, I.; Kratz, J. V.; Krier, J.; Kurz, N.; Lens, L.; Ljungberg, J.; Lommel, B.; Louko, J.; Meyer, C.-C.; Mistry, A.; Mokry, C.; Papadakis, P.; Parr, E.; Pore, J. L.; Ragnarsson, I.; Runke, J.; Schädel, M.; Schaffner, H.; Schausten, B.

Spectroscopy along flerovium decay chains. II. Fine structure in odd-A ²⁸⁹Fl

Mark

Cox, D. M. ^LU ; Såmark-Roth, A. ^LU ; Rudolph, D. ^LU

; Sarmiento, L. G. ^LU ; Clark, R. M. ; Egido, J. L. ; Golubev, P. ^LU ; Heery, J. ; Yakushev, A. and Åberg, S. ^LU , et al. (2023) In Physical Review C 107(2).

Abstract: Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus ²⁸⁹Fl were observed following the fusion-evaporation reaction ⁴⁸Ca+²⁴⁴Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of ²⁸⁹Fl. This implies that close-lying levels in nuclei along these chains have quite different spin-parity assignments. Further, observed α-electron and α-photon coincidences, as well as the α-decay fine structure along the decay chains, suggest a change in the ground-state spin assignment between ²⁸⁵Cn and ²⁸¹Ds. Our experimental results, on the excited level structure of the heaviest odd-N nuclei to date,... (More); Fifteen correlated α-decay chains starting from the odd-A superheavy nucleus ²⁸⁹Fl were observed following the fusion-evaporation reaction ⁴⁸Ca+²⁴⁴Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of ²⁸⁹Fl. This implies that close-lying levels in nuclei along these chains have quite different spin-parity assignments. Further, observed α-electron and α-photon coincidences, as well as the α-decay fine structure along the decay chains, suggest a change in the ground-state spin assignment between ²⁸⁵Cn and ²⁸¹Ds. Our experimental results, on the excited level structure of the heaviest odd-N nuclei to date, provide a direct testing ground for theory. This is illustrated by comparison with new nuclear structure calculations based on the symmetry-conserving configuration mixing theory. (Less)

Please use this url to cite or link to this publication: https://lup.lub.lu.se/record/5ee9ca0f-3253-43e2-9534-f63589966e57

author

Cox, D. M. ^LU ; Såmark-Roth, A. ^LU ; Rudolph, D. ^LU

; Sarmiento, L. G. ^LU ; Clark, R. M. ; Egido, J. L. ; Golubev, P. ^LU ; Heery, J. ; Yakushev, A. and Åberg, S. ^LU , et al. (More)

Cox, D. M. ^LU ; Såmark-Roth, A. ^LU ; Rudolph, D. ^LU

; Sarmiento, L. G. ^LU ; Clark, R. M. ; Egido, J. L. ; Golubev, P. ^LU ; Heery, J. ; Yakushev, A. ; Åberg, S. ^LU ; Albers, H. M. ; Albertsson, M. ^LU ; Block, M. ; Brand, H. ; Calverley, T. ; Cantemir, R. ; Carlsson, B. G. ^LU ; Düllmann, Ch. E. ; Eberth, J. ; Fahlander, C. ^LU ; Forsberg, U. ^LU ; Gates, J. M. ; Giacoppo, F. ; Götz, M. ; Götz, S. ; Herzberg, R.-D. ; Hrabar, Y. ^LU

; Jäger, E. ; Judson, D. ; Khuyagbaatar, J. ; Kindler, B. ; Kojouharov, I. ; Kratz, J. V. ; Krier, J. ; Kurz, N. ; Lens, L. ; Ljungberg, J. ^LU ; Lommel, B. ; Louko, J. ; Meyer, C.-C. ; Mistry, A. ; Mokry, C. ; Papadakis, P. ; Parr, E. ; Pore, J. L. ; Ragnarsson, I. ^LU ; Runke, J. ; Schädel, M. ; Schaffner, H. ; Schausten, B. ; Shaughnessy, D. A. ; Thörle-Pospiech, P. ; Trautmann, N. and Uusitalo, J. (Less)

organization

publishing date

2023-02-06

type

Contribution to journal

publication status

published

subject

Subatomic Physics

keywords

Superheavy elements, Nuclear spectroscopy, Alpha decay, Mean field theory, Island of stability

in

Physical Review C

volume

107

issue

2

article number

L021301

pages

6 pages

publisher

American Physical Society

external identifiers

scopus:85149691484

ISSN

2469-9985

DOI

10.1103/PhysRevC.107.L021301

project

Characterization of New Superheavy Elements

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Spectroscopy along Decay Chains of Element 114, Flerovium

language

English

LU publication?

yes

id

5ee9ca0f-3253-43e2-9534-f63589966e57

date added to LUP

2023-02-07 04:39:51

date last changed

2024-03-06 23:58:35

@article{5ee9ca0f-3253-43e2-9534-f63589966e57,
  abstract     = {{Fifteen correlated α-decay chains starting from the odd-<i>A</i> superheavy nucleus <sup>289</sup>Fl were observed following the fusion-evaporation reaction <sup>48</sup>Ca+<sup>244</sup>Pu. The results call for at least two parallel α-decay sequences starting from at least two different states of <sup>289</sup>Fl. This implies that close-lying levels in nuclei along these chains have quite different spin-parity assignments. Further, observed α-electron and α-photon coincidences, as well as the α-decay fine structure along the decay chains, suggest a change in the ground-state spin assignment between <sup>285</sup>Cn and <sup>281</sup>Ds. Our experimental results, on the excited level structure of the heaviest odd-<i>N</i> nuclei to date, provide a direct testing ground for theory. This is illustrated by comparison with new nuclear structure calculations based on the symmetry-conserving configuration mixing theory.}},
  author       = {{Cox, D. M. and Såmark-Roth, A. and Rudolph, D. and Sarmiento, L. G. and Clark, R. M. and Egido, J. L. and Golubev, P. and Heery, J. and Yakushev, A. and Åberg, S. and Albers, H. M. and Albertsson, M. and Block, M. and Brand, H. and Calverley, T. and Cantemir, R. and Carlsson, B. G. and Düllmann, Ch. E. and Eberth, J. and Fahlander, C. and Forsberg, U. and Gates, J. M. and Giacoppo, F. and Götz, M. and Götz, S. and Herzberg, R.-D. and Hrabar, Y. and Jäger, E. and Judson, D. and Khuyagbaatar, J. and Kindler, B. and Kojouharov, I. and Kratz, J. V. and Krier, J. and Kurz, N. and Lens, L. and Ljungberg, J. and Lommel, B. and Louko, J. and Meyer, C.-C. and Mistry, A. and Mokry, C. and Papadakis, P. and Parr, E. and Pore, J. L. and Ragnarsson, I. and Runke, J. and Schädel, M. and Schaffner, H. and Schausten, B. and Shaughnessy, D. A. and Thörle-Pospiech, P. and Trautmann, N. and Uusitalo, J.}},
  issn         = {{2469-9985}},
  keywords     = {{Superheavy elements; Nuclear spectroscopy; Alpha decay; Mean field theory; Island of stability}},
  language     = {{eng}},
  month        = {{02}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Spectroscopy along flerovium decay chains. II. Fine structure in odd-<i>A</i> <sup>289</sup>Fl}},
  url          = {{https://lup.lub.lu.se/search/files/136897865/PhysRevC.107.L021301.pdf}},
  doi          = {{10.1103/PhysRevC.107.L021301}},
  volume       = {{107}},
  year         = {{2023}},
}

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Spectroscopy along flerovium decay chains. II. Fine structure in odd-A ²⁸⁹Fl