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

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; Claes Fahlander; Ulrika Forsberg; J. M. Gates; N. Gharibyan; Pavel 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; Dirk Rudolph; J. Runke; K. P. Rykaczewski; Luis 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/PhysRevLett.112.172501

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

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, Claes Fahlander, Ulrika Forsberg, J. M. Gates, N. GharibyanPavel 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, Dirk Rudolph, J. Runke, K. P. Rykaczewski, Luis 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

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Abstract

The superheavy element with atomic number Z=117 was produced as an evaporation residue in the 48Ca+249Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allowed measuring decays of single atomic nuclei with half-lives between sub-μs and a few days. Two decay chains comprising seven α decays and a spontaneous fission each were identified and are assigned to the isotope 294-117 and its decay products. A hitherto unknown α-decay branch in 270Db (Z=105) was observed, which populated the new isotope 266Lr (Z=103). The identification of the long-lived (T1/2=1.0+1.9−0.4 h) α-emitter 270Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an “island of stability.”

Original language	English
Article number	172501
Number of pages	4
Journal	Physical Review Letters
Volume	112
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.112.172501
Publication status	Published - 2014

Subject classification (UKÄ)

Subatomic Physics

Free keywords

superheavy elements
element 117
alpha-decay

Access to Document

10.1103/PhysRevLett.112.172501

PhysRevLett.112.172501

http://link.aps.org/doi/10.1103/PhysRevLett.112.172501

3 Article

Search for elements 119 and 120
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. & 51 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. K., Mokry, C., Nitsche, H., Omtvedt, J. P., Pang, G. K., Papadakis, P., Renisch, D., Roberto, J. B., Rudolph, D., Runke, J., Rykaczewski, K. P., Sarmiento Pico, L., 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., Wegrzecki, M., Wiehl, N., Van Cleve, S. M. & Yakusheva, V., 2020 Dec 2, In: Physical Review C. 102, 6, 9 p., 064602.
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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

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Spectroscopy of Element 115 Decay Chains
Rudolph, D., Forsberg, U., Golubev, P., Sarmiento, L., Yakushev, A., Andersson, L.-L., Di Nitto, A., Düllmann, C. E., Gates, J. M., Gregorich, K. E., Gross, C. J., Heßberger, F. P., Herzberg, R.-D., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Åberg, S., Ackermann, D. & Block, M. & 31 others, Brand, H., Carlsson, G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. & Wiehl, N., 2013, In: Physical Review Letters. 111, 11, 112502.
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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

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. (2014). 48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr. Physical Review Letters, 112(17), Article 172501. https://doi.org/10.1103/PhysRevLett.112.172501

@article{e58e87578d534c998141dfcbe56c5741,

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

abstract = "The superheavy element with atomic number Z=117 was produced as an evaporation residue in the 48Ca+249Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allowed measuring decays of single atomic nuclei with half-lives between sub-μs and a few days. Two decay chains comprising seven α decays and a spontaneous fission each were identified and are assigned to the isotope 294-117 and its decay products. A hitherto unknown α-decay branch in 270Db (Z=105) was observed, which populated the new isotope 266Lr (Z=103). The identification of the long-lived (T1/2=1.0+1.9−0.4 h) α-emitter 270Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an “island of stability.”",

keywords = "superheavy elements, element 117, alpha-decay",

author = "J. Khuyagbaatar and A. Yakushev and Ch. E. D{\"u}llmann and D. Ackermann and L.-L. Andersson and M. Asai and M. Block and R. A. Boll and H. Brand and D. M. Cox and M. Dasgupta and X. Derkx and {Di Nitto}, A. and K. Eberhardt and J. Even and M. Evers and Claes Fahlander and Ulrika Forsberg and J. M. Gates and N. Gharibyan and Pavel Golubev and K. E. Gregorich and J. H. Hamilton and W. Hartmann and R.-D. Herzberg and F. P. He{\ss}berger and D. J. Hinde 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 A. Mistry and C. Mokry and H. Nitsche and J. P. Omtvedt and G. K. Pang and P. Papadakis and D. Renisch and J. Roberto and Dirk Rudolph and J. Runke and K. P. Rykaczewski and Luis Sarmiento and M. Sch{\"a}del and B. Schausten and A. Semchenkov and D. A. Shaughnessy and P. Steinegger and J. Steiner and E. E. Tereshatov 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 D. E. Ward and M. Wegrzecki and N. Wiehl and {Van Cleve}, S. M. and V. Yakusheva",

year = "2014",

doi = "10.1103/PhysRevLett.112.172501",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "1079-7114",

publisher = "American Physical Society",

number = "17",

}

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, A, Mokry, C, Nitsche, H, Omtvedt, JP, Pang, GK, Papadakis, P, Renisch, D, Roberto, J, Rudolph, D, Runke, J, Rykaczewski, KP, Sarmiento, 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, Ward, DE, Wegrzecki, M, Wiehl, N, Van Cleve, SM & Yakusheva, V 2014, '48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr', Physical Review Letters, vol. 112, no. 17, 172501. https://doi.org/10.1103/PhysRevLett.112.172501

TY - JOUR

T1 - 48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr

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, Claes

AU - Forsberg, Ulrika

AU - Gates, J. M.

AU - Gharibyan, N.

AU - Golubev, Pavel

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, Dirk

AU - Runke, J.

AU - Rykaczewski, K. P.

AU - Sarmiento, 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 - Ward, D. E.

AU - Wegrzecki, M.

AU - Wiehl, N.

AU - Van Cleve, S. M.

AU - Yakusheva, V.

PY - 2014

Y1 - 2014

N2 - The superheavy element with atomic number Z=117 was produced as an evaporation residue in the 48Ca+249Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allowed measuring decays of single atomic nuclei with half-lives between sub-μs and a few days. Two decay chains comprising seven α decays and a spontaneous fission each were identified and are assigned to the isotope 294-117 and its decay products. A hitherto unknown α-decay branch in 270Db (Z=105) was observed, which populated the new isotope 266Lr (Z=103). The identification of the long-lived (T1/2=1.0+1.9−0.4 h) α-emitter 270Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an “island of stability.”

AB - The superheavy element with atomic number Z=117 was produced as an evaporation residue in the 48Ca+249Bk fusion reaction at the gas-filled recoil separator TASCA at GSI Darmstadt, Germany. The radioactive decay of evaporation residues and their α-decay products was studied using a detection setup that allowed measuring decays of single atomic nuclei with half-lives between sub-μs and a few days. Two decay chains comprising seven α decays and a spontaneous fission each were identified and are assigned to the isotope 294-117 and its decay products. A hitherto unknown α-decay branch in 270Db (Z=105) was observed, which populated the new isotope 266Lr (Z=103). The identification of the long-lived (T1/2=1.0+1.9−0.4 h) α-emitter 270Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an “island of stability.”

KW - superheavy elements

KW - element 117

KW - alpha-decay

U2 - 10.1103/PhysRevLett.112.172501

DO - 10.1103/PhysRevLett.112.172501

M3 - Article

C2 - 24836239

SN - 1079-7114

VL - 112

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 172501

ER -

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

Abstract

Subject classification (UKÄ)

Free keywords

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Research output

Search for elements 119 and 120

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

Spectroscopy of Element 115 Decay Chains

Projects

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Cite this

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