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

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

doi:10.1103/PhysRevC.107.L021301

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

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

Mathematical Physics

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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, 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.

Original language	English
Article number	L021301
Number of pages	6
Journal	Physical Review C
Volume	107
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.107.L021301
Publication status	Published - 2023 Feb 6

Subject classification (UKÄ)

Subatomic Physics

Free keywords

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

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PhysRevC.107.L021301Final published version, 508 KBLicence: CC BY

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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, C. E., Eberth, J., ... Uusitalo, J. (2023). Spectroscopy along flerovium decay chains. II. Fine structure in odd-A ²⁸⁹Fl. Physical Review C, 107(2), Article L021301. https://doi.org/10.1103/PhysRevC.107.L021301

@article{5ee9ca0f325343e29534f63589966e57,

title = "Spectroscopy along flerovium decay chains. II. Fine structure in odd-A 289Fl",

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, 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.",

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

author = "Cox, {D. M.} and A. S{\aa}mark-Roth and D. Rudolph and Sarmiento, {L. G.} and Clark, {R. M.} and Egido, {J. L.} and P. Golubev and J. Heery and A. Yakushev and S. {\AA}berg and Albers, {H. M.} and M. Albertsson and M. Block and H. Brand and T. Calverley and R. Cantemir and Carlsson, {B. G.} and D{\"u}llmann, {Ch. E.} and J. Eberth and C. Fahlander and U. Forsberg and Gates, {J. M.} and F. Giacoppo and M. G{\"o}tz and S. G{\"o}tz and R.-D. Herzberg and Y. Hrabar and E. J{\"a}ger and D. Judson and J. Khuyagbaatar and B. Kindler and I. Kojouharov and Kratz, {J. V.} and J. Krier and N. Kurz and L. Lens and J. Ljungberg and B. Lommel and J. Louko and C.-C. Meyer and A. Mistry and C. Mokry and P. Papadakis and E. Parr and Pore, {J. L.} and I. Ragnarsson and J. Runke and M. Sch{\"a}del and H. Schaffner and B. Schausten and Shaughnessy, {D. A.} and P. Th{\"o}rle-Pospiech and N. Trautmann and J. Uusitalo",

year = "2023",

month = feb,

day = "6",

doi = "10.1103/PhysRevC.107.L021301",

language = "English",

volume = "107",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "2",

}

Cox, DM, Såmark-Roth, A, Rudolph, D , Sarmiento, LG, Clark, RM, Egido, JL, Golubev, P, Heery, J, Yakushev, A, Åberg, S, Albers, HM, Albertsson, M, Block, M, Brand, H, Calverley, T, Cantemir, R, Carlsson, BG, Düllmann, CE, Eberth, J, Fahlander, C, Forsberg, U, Gates, JM, Giacoppo, F, Götz, M, Götz, S, Herzberg, R-D, Hrabar, Y, Jäger, E, Judson, D, Khuyagbaatar, J, Kindler, B, Kojouharov, I, Kratz, JV, Krier, J, Kurz, N, Lens, L, Ljungberg, J, Lommel, B, Louko, J, Meyer, C-C, Mistry, A, Mokry, C, Papadakis, P, Parr, E, Pore, JL, Ragnarsson, I, Runke, J, Schädel, M, Schaffner, H, Schausten, B, Shaughnessy, DA, Thörle-Pospiech, P, Trautmann, N & Uusitalo, J 2023, 'Spectroscopy along flerovium decay chains. II. Fine structure in odd-A ²⁸⁹Fl', Physical Review C, vol. 107, no. 2, L021301. https://doi.org/10.1103/PhysRevC.107.L021301

TY - JOUR

T1 - Spectroscopy along flerovium decay chains. II. Fine structure in odd-A 289Fl

AU - Cox, D. M.

AU - Såmark-Roth, A.

AU - Rudolph, D.

AU - Sarmiento, L. G.

AU - Clark, R. M.

AU - Egido, J. L.

AU - Golubev, P.

AU - Heery, J.

AU - Yakushev, A.

AU - Åberg, S.

AU - Albers, H. M.

AU - Albertsson, M.

AU - Block, M.

AU - Brand, H.

AU - Calverley, T.

AU - Cantemir, R.

AU - Carlsson, B. G.

AU - Düllmann, Ch. E.

AU - Eberth, J.

AU - Fahlander, C.

AU - Forsberg, U.

AU - Gates, J. M.

AU - Giacoppo, F.

AU - Götz, M.

AU - Götz, S.

AU - Herzberg, R.-D.

AU - Hrabar, Y.

AU - Jäger, E.

AU - Judson, D.

AU - Khuyagbaatar, J.

AU - Kindler, B.

AU - Kojouharov, I.

AU - Kratz, J. V.

AU - Krier, J.

AU - Kurz, N.

AU - Lens, L.

AU - Ljungberg, J.

AU - Lommel, B.

AU - Louko, J.

AU - Meyer, C.-C.

AU - Mistry, A.

AU - Mokry, C.

AU - Papadakis, P.

AU - Parr, E.

AU - Pore, J. L.

AU - Ragnarsson, I.

AU - Runke, J.

AU - Schädel, M.

AU - Schaffner, H.

AU - Schausten, B.

AU - Shaughnessy, D. A.

AU - Thörle-Pospiech, P.

AU - Trautmann, N.

AU - Uusitalo, J.

PY - 2023/2/6

Y1 - 2023/2/6

N2 - 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.

AB - 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.

KW - Superheavy elements

KW - Nuclear spectroscopy

KW - Alpha decay

KW - Mean field theory

KW - Island of stability

UR - https://journals.aps.org/prc/abstract/10.1103/PhysRevC.107.L021301

U2 - 10.1103/PhysRevC.107.L021301

DO - 10.1103/PhysRevC.107.L021301

M3 - Article

SN - 2469-9985

VL - 107

JO - Physical Review C

JF - Physical Review C

IS - 2

M1 - L021301

ER -

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

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Subject classification (UKÄ)

Free keywords

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