Search for elements 119 and 120

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. K. Mistry; C. Mokry; H. Nitsche; J. P. Omtvedt; G. K. Pang; P. Papadakis; D. Renisch; J. B. Roberto; D. Rudolph; J. Runke; K. P. Rykaczewski; Luis Sarmiento Pico; 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; M. Wegrzecki; N. Wiehl; S. M. Van Cleve; V. Yakusheva

doi:10.1103/PhysRevC.102.064602

Search for elements 119 and 120

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. K. Mistry, C. Mokry, H. Nitsche, J. P. Omtvedt, G. K. Pang, P. Papadakis, D. Renisch, J. B. Roberto, D. Rudolph, J. Runke, K. P. Rykaczewski, Luis Sarmiento Pico, 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, M. Wegrzecki, N. Wiehl, S. M. Van Cleve, V. Yakusheva

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Abstract

A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the ⁵⁰Ti+²⁴⁹Bk and ⁵⁰Ti+²⁴⁹Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the ²⁴⁹Bk target partially decayed into ²⁴⁹Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the ⁵⁰Ti+²⁴⁹Bk and ⁵⁰Ti+²⁴⁹Cf reactions, respectively, at a midtarget beam energy of E_lab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

Original language	English
Article number	064602
Number of pages	9
Journal	Physical Review C
Volume	102
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.102.064602
Publication status	Published - 2020 Dec 2

Subject classification (UKÄ)

Subatomic Physics

Free keywords

superheavy elements
element 119
element 120
Production cross section

Access to Document

10.1103/PhysRevC.102.064602

PhysRevC.102.064602Final published version, 382 KB

4 Article

Fusion reaction ⁴⁸Ca + ²⁴⁹Bk leading to formation of the element Ts (Z=117)
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. & Gharibyan, N. & 52 others, Golubev, P., Gregorich, K. E., Hamilton, J. H., Hartmann, W., Herzberg, R. D., Heßberger, F. P., Hinde, D. J., Hoffmann, J., Hollinger, R., Hübner, A., Jäger, E., Kindler, B., Kratz, J. V., 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, J. P., Pang, G. K., Papadakis, P., Renisch, D., Roberto, J., Rudolph, D., Runke, J., Rykaczewski, K. P., Sarmiento, L. G., Schädel, M., Schausten, B., Semchenkov, A., Shaughnessy, D. A., Steinegger, P., Steiner, J., Tereshatov, E. E., Thörle-Pospiech, P., Tinschert, K., Torres De Heidenreich, T., Trautmann, N., Türler, A., Uusitalo, J., Ward, D. E., Wegrzecki, M., Wiehl, N., Van Cleve, S. M. & Yakusheva, V., 2019 May 7, In: Physical Review C. 99, 5, 16 p., 054306.
Research output: Contribution to journal › Article › peer-review

Open Access
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A new assessment of the alleged link between element 115 and element 117 decay chains
Forsberg, U., Rudolph, D., Fahlander, C., Golubev, P., Sarmiento, L. G., Åberg, S., Block, M., Düllmann, C. E., Heßberger, F. P., Kratz, J. V. & Yakushev, A., 2016 Sept 10, In: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. 760, p. 293-296 4 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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2038 Downloads (Pure)
48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr
Khuyagbaatar, J., Yakushev, A., Düllmann, C. ., Ackermann, D., Andersson, L.-L., Asai, M., Block, M., Boll, R. ., Brand, H., Cox, D. ., Dasgupta, M., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J. . & Gharibyan, N. & 52 others, Golubev, P., Gregorich, K. ., Hamilton, J. ., Hartmann, W., Herzberg, R.-D., Heßberger, F. ., Hinde, D. ., Hoffmann, J., Hollinger, R., Hübner, A., Jäger, E., Kindler, B., Kratz, J. ., 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, J. ., Pang, G. ., Papadakis, P., Renisch, D., Roberto, J., Rudolph, D., Runke, J., Rykaczewski, K. ., Sarmiento, L., Schädel, M., Schausten, B., Semchenkov, A., Shaughnessy, D. ., Steinegger, P., Steiner, J., Tereshatov, E. ., Thörle-Pospiech, P., Tinschert, K., Torres De Heidenreich, T., Trautmann, N., Türler, A., Uusitalo, J., Ward, D. ., Wegrzecki, M., Wiehl, N., Van Cleve, S. . & Yakusheva, V., 2014, In: Physical Review Letters. 112, 17, 4 p., 172501.
Research output: Contribution to journal › Article › peer-review

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1 Finished
1 Active

Nuclear Structure at the Limits: Isotope-selective Spectroscopy
Rudolph, D. (PI), Fahlander, C. (CoI), Golubev, P. (CoI), Sarmiento Pico, L. (CoI), Cox, D. (Researcher), Hrabar, Y. (Research student), Såmark-Roth, A. (Research student), Forsberg, U. (Researcher), Lorenz, C. (Research student), Lalovic, N. (Researcher), Lalovic, N. (Research student), Forsberg, U. (Research student), Gellanki, J. (Research student), Hoischen, R. (Research student), Johansson, E. (Research student), Andersson, L.-L. (Research student), du Rietz, R. (Research student), Ekman, J. (Research student) & Andreoiu, C. (Research student)
Swedish Research Council
2002/01/01 → 2027/12/31
Project: Research
Element 115
Forsberg, U. (Research student), Rudolph, D. (Supervisor), Golubev, P. (Assistant supervisor) & Fahlander, C. (Assistant supervisor)
The Royal Physiographic Society in Lund
2011/01/01 → 2016/05/31
Project: Dissertation

1 Invited talk

Nuclear Spectroscopy of Superheavy Nuclei
Rudolph, D. (Invited speaker)
2020 Nov 23
Activity: Talk or presentation › Invited talk

Cite this

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. (2020). Search for elements 119 and 120. Physical Review C, 102(6), Article 064602. https://doi.org/10.1103/PhysRevC.102.064602

@article{14c0d0b747e44d84bc6f5041943579d5,

title = "Search for elements 119 and 120",

abstract = "A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the 50Ti+249Bk and 50Ti+249Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the 249Bk target partially decayed into 249Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the 50Ti+249Bk and 50Ti+249Cf reactions, respectively, at a midtarget beam energy of Elab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.",

keywords = "superheavy elements, element 119, element 120, Production cross section",

author = "J. Khuyagbaatar and A. Yakushev and D{\"u}llmann, {Ch. E.} and D. Ackermann and L.-L. Andersson and M. Asai and M. Block and R.A. Boll 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 R.-D. Herzberg 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 J.V. Kratz 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 Mistry, {A. K.} and C. Mokry and H. Nitsche and Omtvedt, {J. P.} and Pang, {G. K.} and P. Papadakis and D. Renisch and Roberto, {J. B.} and D. Rudolph and J. Runke and Rykaczewski, {K. P.} and {Sarmiento Pico}, Luis 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 M. Wegrzecki and N. Wiehl and {Van Cleve}, {S. M.} and V. Yakusheva",

year = "2020",

month = dec,

day = "2",

doi = "10.1103/PhysRevC.102.064602",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "6",

}

Khuyagbaatar, J, Yakushev, A, Düllmann, CE, Ackermann, D, Andersson, L-L, 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, R-D, 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, AK, Mokry, C, Nitsche, H, Omtvedt, JP, Pang, GK, Papadakis, P, Renisch, D, Roberto, JB, Rudolph, D, Runke, J, Rykaczewski, KP, Sarmiento Pico, L, 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, Wegrzecki, M, Wiehl, N, Van Cleve, SM & Yakusheva, V 2020, 'Search for elements 119 and 120', Physical Review C, vol. 102, no. 6, 064602. https://doi.org/10.1103/PhysRevC.102.064602

TY - JOUR

T1 - Search for elements 119 and 120

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. K.

AU - Mokry, C.

AU - Nitsche, H.

AU - Omtvedt, J. P.

AU - Pang, G. K.

AU - Papadakis, P.

AU - Renisch, D.

AU - Roberto, J. B.

AU - Rudolph, D.

AU - Runke, J.

AU - Rykaczewski, K. P.

AU - Sarmiento Pico, Luis

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 - Wegrzecki, M.

AU - Wiehl, N.

AU - Van Cleve, S. M.

AU - Yakusheva, V.

PY - 2020/12/2

Y1 - 2020/12/2

N2 - A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the 50Ti+249Bk and 50Ti+249Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the 249Bk target partially decayed into 249Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the 50Ti+249Bk and 50Ti+249Cf reactions, respectively, at a midtarget beam energy of Elab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

AB - A search for production of the superheavy elements with atomic numbers 119 and 120 was performed in the 50Ti+249Bk and 50Ti+249Cf fusion-evaporation reactions, respectively, at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. Over four months of irradiation, the 249Bk target partially decayed into 249Cf, which allowed for a simultaneous search for both elements. Neither was detected at cross-section sensitivity levels of 65 and 200 fb for the 50Ti+249Bk and 50Ti+249Cf reactions, respectively, at a midtarget beam energy of Elab = 281.5 MeV. The nonobservation of elements 119 and 120 is discussed within the concept of fusion-evaporation reactions including various theoretical predictions on the fission-barrier heights of superheavy nuclei in the region of the island of stability.

KW - superheavy elements

KW - element 119

KW - element 120

KW - Production cross section

U2 - 10.1103/PhysRevC.102.064602

DO - 10.1103/PhysRevC.102.064602

M3 - Article

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 6

M1 - 064602

ER -

Search for elements 119 and 120

Abstract

Subject classification (UKÄ)

Free keywords

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Research output

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

A new assessment of the alleged link between element 115 and element 117 decay chains

48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr

Projects

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Element 115

Activities

Nuclear Spectroscopy of Superheavy Nuclei

Cite this

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