Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)

J. Khuyagbaatar; A. Yakushev; Ch E. Düllmann; D. Ackermann; L. L. Andersson; M. Asai; M. Block; R. A. Boll; H. Brand; D. M. Cox; M. Dasgupta; X. Derkx; A. Di Nitto; K. Eberhardt; J. Even; M. Evers; C. Fahlander; U. Forsberg; J. M. Gates; N. Gharibyan; P. Golubev; K. E. Gregorich; J. H. Hamilton; W. Hartmann; R. D. Herzberg; F. P. Heßberger; D. J. Hinde; J. Hoffmann; R. Hollinger; A. Hübner; E. Jäger; B. Kindler; J. V. Kratz; J. Krier; N. Kurz; M. Laatiaoui; S. Lahiri; R. Lang; B. Lommel; M. Maiti; K. Miernik; S. Minami; A. Mistry; C. Mokry; H. Nitsche; J. P. Omtvedt; G. K. Pang; P. Papadakis; D. Renisch; J. Roberto; D. Rudolph; J. Runke; K. P. Rykaczewski; L. G. Sarmiento; M. Schädel; B. Schausten; A. Semchenkov; D. A. Shaughnessy; P. Steinegger; J. Steiner; E. E. Tereshatov; P. Thörle-Pospiech; K. Tinschert; T. Torres De Heidenreich; N. Trautmann; A. Türler; J. Uusitalo; D. E. Ward; M. Wegrzecki; N. Wiehl; S. M. Van Cleve; V. Yakusheva

doi:10.1103/PhysRevC.99.054306

Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)

J. Khuyagbaatar, A. Yakushev, Ch E. Düllmann, D. Ackermann, L. L. Andersson, M. Asai, M. Block, R. A. Boll, H. Brand, D. M. Cox, M. Dasgupta, X. Derkx, A. Di Nitto, K. Eberhardt, J. Even, M. Evers, C. Fahlander, U. Forsberg, J. M. Gates, N. GharibyanP. Golubev, K. E. Gregorich, J. H. Hamilton, W. Hartmann, R. D. Herzberg, F. P. Heßberger, D. J. Hinde, J. Hoffmann, R. Hollinger, A. Hübner, E. Jäger, B. Kindler, J. V. Kratz, J. Krier, N. Kurz, M. Laatiaoui, S. Lahiri, R. Lang, B. Lommel, M. Maiti, K. Miernik, S. Minami, A. Mistry, C. Mokry, H. Nitsche, J. P. Omtvedt, G. K. Pang, P. Papadakis, D. Renisch, J. Roberto, D. Rudolph, J. Runke, K. P. Rykaczewski, L. G. Sarmiento, M. Schädel, B. Schausten, A. Semchenkov, D. A. Shaughnessy, P. Steinegger, J. Steiner, E. E. Tereshatov, P. Thörle-Pospiech, K. Tinschert, T. Torres De Heidenreich, N. Trautmann, A. Türler, J. Uusitalo, D. E. Ward, M. Wegrzecki, N. Wiehl, S. M. Van Cleve, V. Yakusheva

Isotope Applications Research

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Abstract

The heaviest currently known nuclei, which have up to 118 protons, have been produced in Ca48 induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing Ca48 with the radioactive target Bk249, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of Ts294. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to Ts293. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.

Original language	English
Article number	054306
Journal	Physical Review C
Volume	99
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.99.054306
State	Published - May 7 2019

Funding

We are grateful for GSI's ECR ion-source and UNILAC staff, and the Experimental Electronics department for their continuous support of the experiment. This work was financially supported in part by the German BMBF (05P12UMFNE), the Helmholtz association (VH-NG-723), the Australian Research Council, the Swedish Research Council (VR 2011-5253), the U.S. Department of Energy by LLNL (DE-AC52-07NA27344), the Laboratory Directed Research and Development Program at LLNL (11-ERD-011), and the Helmholtz Institute Mainz. This work was co-sponsored by the Office of Science, U.S. Department of Energy, and supported under U.S. DOE Grant No. DE-AC05-00OR22725. Three of us (J.M.G., K.E.G., H.N.) were supported by the U.S. Department of Energy, Office of Science, Nuclear Physics, Low Energy Physics Program, through the Lawrence Berkeley National Laboratory under Contract No. DE-AC02-05CH11231.

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10.1103/PhysRevC.99.054306

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Khuyagbaatar, J., Yakushev, A., Düllmann, C. E., Ackermann, D., Andersson, L. L., Asai, M., Block, M., Boll, R. A., Brand, H., Cox, D. M., Dasgupta, M., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J. M., ... Yakusheva, V. (2019). Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117). Physical Review C, 99(5), Article 054306. https://doi.org/10.1103/PhysRevC.99.054306

@article{51813ae16d9347c8987420922cb8d897,

title = "Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)",

abstract = "The heaviest currently known nuclei, which have up to 118 protons, have been produced in Ca48 induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing Ca48 with the radioactive target Bk249, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of Ts294. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to Ts293. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.",

author = "J. Khuyagbaatar and A. Yakushev and D{\"u}llmann, {Ch E.} and D. Ackermann and Andersson, {L. L.} and M. Asai and M. Block and Boll, {R. A.} and H. Brand and Cox, {D. M.} and M. Dasgupta and X. Derkx and {Di Nitto}, A. and K. Eberhardt and J. Even and M. Evers and C. Fahlander and U. Forsberg and Gates, {J. M.} and N. Gharibyan and P. Golubev and Gregorich, {K. E.} and Hamilton, {J. H.} and W. Hartmann and Herzberg, {R. D.} and He{\ss}berger, {F. P.} and Hinde, {D. J.} and J. Hoffmann and R. Hollinger and A. H{\"u}bner and E. J{\"a}ger and B. Kindler and Kratz, {J. V.} and J. Krier and N. Kurz and M. Laatiaoui and S. Lahiri and R. Lang and B. Lommel and M. Maiti and K. Miernik and S. Minami and A. Mistry and C. Mokry and H. Nitsche and Omtvedt, {J. P.} and Pang, {G. K.} and P. Papadakis and D. Renisch and J. Roberto and D. Rudolph and J. Runke and Rykaczewski, {K. P.} and Sarmiento, {L. G.} and M. Sch{\"a}del and B. Schausten and A. Semchenkov and Shaughnessy, {D. A.} and P. Steinegger and J. Steiner and Tereshatov, {E. E.} and P. Th{\"o}rle-Pospiech and K. Tinschert and {Torres De Heidenreich}, T. and N. Trautmann and A. T{\"u}rler and J. Uusitalo and Ward, {D. E.} and M. Wegrzecki and N. Wiehl and {Van Cleve}, {S. M.} and V. Yakusheva",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = may,

day = "7",

doi = "10.1103/PhysRevC.99.054306",

language = "English",

volume = "99",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "5",

}

Khuyagbaatar, J, Yakushev, A, Düllmann, CE, Ackermann, D, Andersson, LL, Asai, M, Block, M, Boll, RA, Brand, H, Cox, DM, Dasgupta, M, Derkx, X, Di Nitto, A, Eberhardt, K, Even, J, Evers, M, Fahlander, C, Forsberg, U, Gates, JM, Gharibyan, N, Golubev, P, Gregorich, KE, Hamilton, JH, Hartmann, W, Herzberg, RD, Heßberger, FP, Hinde, DJ, Hoffmann, J, Hollinger, R, Hübner, A, Jäger, E, Kindler, B, Kratz, JV, Krier, J, Kurz, N, Laatiaoui, M, Lahiri, S, Lang, R, Lommel, B, Maiti, M, Miernik, K, Minami, S, Mistry, A, Mokry, C, Nitsche, H, Omtvedt, JP, Pang, GK, Papadakis, P, Renisch, D, Roberto, J, Rudolph, D, Runke, J, Rykaczewski, KP, Sarmiento, LG, Schädel, M, Schausten, B, Semchenkov, A, Shaughnessy, DA, Steinegger, P, Steiner, J, Tereshatov, EE, Thörle-Pospiech, P, Tinschert, K, Torres De Heidenreich, T, Trautmann, N, Türler, A, Uusitalo, J, Ward, DE, Wegrzecki, M, Wiehl, N, Van Cleve, SM & Yakusheva, V 2019, 'Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)', Physical Review C, vol. 99, no. 5, 054306. https://doi.org/10.1103/PhysRevC.99.054306

TY - JOUR

T1 - Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)

AU - Khuyagbaatar, J.

AU - Yakushev, A.

AU - Düllmann, Ch E.

AU - Ackermann, D.

AU - Andersson, L. L.

AU - Asai, M.

AU - Block, M.

AU - Boll, R. A.

AU - Brand, H.

AU - Cox, D. M.

AU - Dasgupta, M.

AU - Derkx, X.

AU - Di Nitto, A.

AU - Eberhardt, K.

AU - Even, J.

AU - Evers, M.

AU - Fahlander, C.

AU - Forsberg, U.

AU - Gates, J. M.

AU - Gharibyan, N.

AU - Golubev, P.

AU - Gregorich, K. E.

AU - Hamilton, J. H.

AU - Hartmann, W.

AU - Herzberg, R. D.

AU - Heßberger, F. P.

AU - Hinde, D. J.

AU - Hoffmann, J.

AU - Hollinger, R.

AU - Hübner, A.

AU - Jäger, E.

AU - Kindler, B.

AU - Kratz, J. V.

AU - Krier, J.

AU - Kurz, N.

AU - Laatiaoui, M.

AU - Lahiri, S.

AU - Lang, R.

AU - Lommel, B.

AU - Maiti, M.

AU - Miernik, K.

AU - Minami, S.

AU - Mistry, A.

AU - Mokry, C.

AU - Nitsche, H.

AU - Omtvedt, J. P.

AU - Pang, G. K.

AU - Papadakis, P.

AU - Renisch, D.

AU - Roberto, J.

AU - Rudolph, D.

AU - Runke, J.

AU - Rykaczewski, K. P.

AU - Sarmiento, L. G.

AU - Schädel, M.

AU - Schausten, B.

AU - Semchenkov, A.

AU - Shaughnessy, D. A.

AU - Steinegger, P.

AU - Steiner, J.

AU - Tereshatov, E. E.

AU - Thörle-Pospiech, P.

AU - Tinschert, K.

AU - Torres De Heidenreich, T.

AU - Trautmann, N.

AU - Türler, A.

AU - Uusitalo, J.

AU - Ward, D. E.

AU - Wegrzecki, M.

AU - Wiehl, N.

AU - Van Cleve, S. M.

AU - Yakusheva, V.

PY - 2019/5/7

Y1 - 2019/5/7

N2 - The heaviest currently known nuclei, which have up to 118 protons, have been produced in Ca48 induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing Ca48 with the radioactive target Bk249, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of Ts294. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to Ts293. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.

AB - The heaviest currently known nuclei, which have up to 118 protons, have been produced in Ca48 induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing Ca48 with the radioactive target Bk249, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of Ts294. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to Ts293. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.

UR - http://www.scopus.com/inward/record.url?scp=85065705289&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.99.054306

DO - 10.1103/PhysRevC.99.054306

M3 - Article

AN - SCOPUS:85065705289

SN - 2469-9985

VL - 99

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054306

ER -

Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)

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