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51. Study of non-fusion products in the Reaction

Author

Di Nitto, A., Khuyagbaatar, J., Ackermann, D., Andersson, L.L., Badura, E., Block, M., Brand, H., Conrad, I., Cox, D.M., Düllmann, Ch.E., Dvorak, J., Eberhardt, K., Ellison, P.A., Esker, N.E., Even, J., Fahlander, C., Forsberg, U., Gates, J.M., Golubev, P., Gothe, O., Gregorich, K.E., Hartmann, W., Herzberg, R.D., Heßberger, F.P., Hoffmann, J., Hollinger, R., Hübner, A., Jäger, E., Kindler, B., Klein, S., Kojouharov, I., Kratz, J.V., Krier, J., Kurz, N., Lahiri, S., Lommel, B., Maiti, M., Mändl, R., Merchán, E., Minami, S., Mistry, A.K., Mokry, C., Nitsche, H., Omtvedt, J.P., Pang, G.K., Renisch, D., Rudolph, D., Runke, J., Sarmiento, L.G., Schädel, M., Schaffner, H., Schausten, B., Semchenkov, A., Steiner, J., Thörle-Pospiech, P., Trautmann, N., Türler, A., Uusitalo, J., Ward, D., Wegrzecki, M., Wieczorek, P., Wiehl, N., Yakushev, A., and Yakusheva, V.

Subjects
Nuclear Experiment
Abstract

The isotopic distribution of nuclei produced in the 50Ti + 249Cf reaction has been studied at the gas-filled recoil separator TASCA at GSI Darmstadt, which separates ions according to differences in magnetic rigidity. The bombardment was performed at an energy around the Bass barrier and with the TASCA magnetic fields set for collecting fusion-evaporation reaction products. Fifty-three isotopes located “north-east” of 208Pb were identified as recoiling products formed in non-fusion channels of the reaction. These recoils were implanted with energies in two distinct ranges; besides one with higher energy, a significant low-energy contribution was identified. The latter observation was not expected to occur according to kinematics of the known types of reactions, namely quasi-elastic, multi-nucleon transfer, deep-inelastic collisions or quasifission. The present observations are discussed within the framework of two-body kinematics passing through the formation of a composite system.

Published
2018

52. Study of non-fusion products in the 50Ti + 249Cf reaction

Author

Di Nitto, Antonio, Khuyagbaatar, J., Ackermann, Dieter, Andersson, L.-L., Badura, E., Block, M., Brand, H., Conrad, I., Cox, D. M., Düllmann, Christoph Emanuel, Dvorak, Jan, Eberhardt, K., Ellison, P. A., Esker, N. E., Even, Julia, Fahlander, C., Forsberg, U., Gates, J. M., Golubev, P., Gothe, O., Gregorich, K. E., Hartmann, W., Herzberg, R. D., Heßberger, F., Hoffmann, J., Hollinger, R., Hübner, A., Jäger, E., Kindler, B., Klein, S., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lahiri, S., Lommel, B., Maiti, M., Mändl, R., Merchán, E., Minami, S., Mistry, A. K., Mokry, C., Nitsche, H., Omtvedt, J. P., Pang, G. K., Renisch, D., Rudolph, D., Runke, J., Sarmiento, L. G., Schädel, M., Schaffner, H., Schausten, B., Semchenkov, A., Steiner, J., Thörle-Pospiech, P., Trautmann, N., Türler, A., Uusitalo, J., Ward, D., Wegrzecki, M., Wieczorek, P., Wiehl, N., Yakushev, A., and Yakusheva, V.

Subjects
ydinreaktiot, production of radioactive nuclei, ddc:530, multi-nucleon transfer reactions, quasifission, Nuclear Experiment, α decay, ydinfysiikka
Abstract

Physics letters / B B 784, 199 - 205 (2018). doi:10.1016/j.physletb.2018.07.058, Published by North-Holland Publ., Amsterdam

Published
2018

53. Identification of Reaction Products in 50Ti+249Cf Reactions at TASCA

Author

Di Nitto, A., Khuyagbaatar, J., Ackermann, D., Adamczewski-Musch, J., Andersson, Lise-Lotte, Badura, E., Block, M, Brand, H., Cox, D. M., Düllmann, Ch. E., Dvorak, J., Eberhardt, K., Ellison, P. A., Esker, N. E., Even, J., Fahlander, Claes, Forsberg, Ulrika, Gates, J.M., Golubev, Pavel, Gothe, O., Gregorich, K.E., Hartmann, W., Herzberg, R.-D., Heßberger, F. P., Hoffmann, J., Hollinger, R., Hübner, A., Jäger, E., Jeppsson, J., Kindler, B., Klein, S., Kojouharov, I., Kratz, J.V., Krier, J., Kurz, N., Lahiri, S., Linev, S., Lommel, B., Maiti, M., Mändl, R., Merchán, E., Minami, S., Mistry, A. K., Mokry, Ch., Nitsche, H., Omtvedt, J. P., Pang, G., Pysmenetska, I., Renisch, D., Rudolph, Dirk, Runke, J., Sarmiento Pico, Luis, Schädel, M., Schaffner, H, Schausten, B., Semchenkov, A., Steiner, J., Thörle-Pospiech, P., Torres De Heidenreich, T., Trautmann, N., Türler, A., Uusitalo, J., Ward, Daniel, Wegrzecki, M., Wieczorek, P., Wiehl, N., Yakushev, A., Yakusheva, V., and Große, Katrin

Subjects
Subatomic Physics
Published
2017

54. Study of non-fusion products in the Ti50+Cf249 reaction

Author

Di Nitto, A., primary, Khuyagbaatar, J., additional, Ackermann, D., additional, Andersson, L.-L., additional, Badura, E., additional, Block, M., additional, Brand, H., additional, Conrad, I., additional, Cox, D.M., additional, Düllmann, Ch.E., additional, Dvorak, J., additional, Eberhardt, K., additional, Ellison, P.A., additional, Esker, N.E., additional, Even, J., additional, Fahlander, C., additional, Forsberg, U., additional, Gates, J.M., additional, Golubev, P., additional, Gothe, O., additional, Gregorich, K.E., additional, Hartmann, W., additional, Herzberg, R.D., additional, Heßberger, F.P., additional, Hoffmann, J., additional, Hollinger, R., additional, Hübner, A., additional, Jäger, E., additional, Kindler, B., additional, Klein, S., additional, Kojouharov, I., additional, Kratz, J.V., additional, Krier, J., additional, Kurz, N., additional, Lahiri, S., additional, Lommel, B., additional, Maiti, M., additional, Mändl, R., additional, Merchán, E., additional, Minami, S., additional, Mistry, A.K., additional, Mokry, C., additional, Nitsche, H., additional, Omtvedt, J.P., additional, Pang, G.K., additional, Renisch, D., additional, Rudolph, D., additional, Runke, J., additional, Sarmiento, L.G., additional, Schädel, M., additional, Schaffner, H., additional, Schausten, B., additional, Semchenkov, A., additional, Steiner, J., additional, Thörle-Pospiech, P., additional, Trautmann, N., additional, Türler, A., additional, Uusitalo, J., additional, Ward, D., additional, Wegrzecki, M., additional, Wieczorek, P., additional, Wiehl, N., additional, Yakushev, A., additional, and Yakusheva, V., additional

Published
2018
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55. Recoil-alpha-fission and recoil-alpha-alpha-fission events observed in the reaction Ca-48+Am-243

Author

Forsberg, U., Rudolph, D., Andersson, L. -L., Di Nitto, A., D��llmann, Ch. E., Gates, J. M., Golubev, P., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Hessberger, F. P., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Sarmiento, L. G., Sch��del, M., Yakushev, A., ��berg, S., Ackermann, D., Block, M., Brand, H., Carlsson, B. G., Cox, D., Derkx, X., Dobaczewski, J., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., J��ger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nazarewicz, W., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Runke, J., Schaffner, H., Schausten, B., Shi, Y., Th��rle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., T��rler, A., Ward, A., Ward, D. E., Wiehl, N., and Research unit Nuclear & Hadron Physics

Subjects
SPECTROSCOPY, Uup, alpha decay, NUCLEI, Superheavy elements, Spontaneous fission, FOS: Physical sciences, SEPARATOR, nucl-ex, HEAVIEST ELEMENTS, CHEMISTRY, SIMULATION, TASCA, Element 115, Nuclear Experiment (nucl-ex), HEAVY, Nuclear Experiment, 115 DECAY CHAINS
Abstract

Products of the fusion-evaporation reaction Ca-48 + Am-243 were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum f\"ur Schwerionenforschung. Amongst the detected thirty correlated alpha-decay chains associated with the production of element Z=115, two recoil-alpha-fission and five recoil-alpha-alpha-fission events were observed. The latter are similar to four such events reported from experiments performed at the Dubna gas-filled separator. Contrary to their interpretation, we propose an alternative view, namely to assign eight of these eleven decay chains of recoil-alpha(-alpha)-fission type to start from the 3n-evaporation channel 115-288. The other three decay chains remain viable candidates for the 2n-evaporation channel 115-289., Comment: 15 pages. Article: 9 pages, 3 tables, 3 figures. Supplemental material: 6 pages, 7 tables, 1 figure. Submitted to PRC

Published
2016

56. Recoil-α-fission and recoil-α-α-fission events observed in the reaction48Ca +243Am

Author

Forsberg, U, Rudolph, D, Andersson, LL, Di Nitto, A, Düllmann, CE, Fahlander, C, Gates, JM, Golubev, P, Gregorich, KE, Gross, CJ, Herzberg, RD, Heßberger, FP, Khuyagbaatar, J, Kratz, JV, Rykaczewski, K, Sarmiento, LG, Schädel, M, Yakushev, A, Åberg, S, Ackermann, D, Block, M, Brand, H, Carlsson, BG, Cox, D, Derkx, X, Dobaczewski, J, Eberhardt, K, Even, J, Gerl, J, Jäger, E, Kindler, B, Krier, J, Kojouharov, I, Kurz, N, Lommel, B, Mistry, A, Mokry, C, Nazarewicz, W, Nitsche, H, Omtvedt, JP, Papadakis, P, Ragnarsson, I, Runke, J, Schaffner, H, Schausten, B, Shi, Y, Thörle-Pospiech, P, Torres, T, Traut, T, Trautmann, N, Türler, A, Ward, A, Ward, DE, and Wiehl, N

Subjects
Nuclear Experiment
Abstract

© 2016 Elsevier B.V. Products of the fusion-evaporation reaction48Ca +243Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α-decay chains associated with the production of element Z=115, two recoil-α-fission and five recoil-α-α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel289115 due to the fact that these recoil-α-α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α-α-fission decay chains, as well as some of the recoil-α-α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel288115.

Published
2016

57. Ca 48 + Bk 249 fusion reaction leading to element Z=117: Long-lived α -decaying Db 270 and discovery of Lr 266

Author

Khuyagbaatar J., Yakushev A., Dullmann Ch. 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., Golubev P., Gregorich K. E., Hamilton J. H., Hartmann W., Herzberg R. -D., Hessberger F. P., Hinde D. J., Hoffmann J., Hollinger R., Hubner A., Jager 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., Schadel M., Schausten B., Semchenkov A., Shaughnessy D. A., Steinegger P., Steiner J., Tereshatov E. E., Thorle-Pospiech P., Tinschert K., Torres De Heidenreich T., Trautmann N., Turler A., Uusitalo J., Ward D. E., Wegrzecki M., Wiehl N., Van Cleve S. M., Yakusheva V., Khuyagbaatar, J., Yakushev, A., Dullmann, Ch. 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., Golubev, P., Gregorich, K. E., Hamilton, J. H., Hartmann, W., Herzberg, R. -D., Hessberger, F. P., Hinde, D. J., Hoffmann, J., Hollinger, R., Hubner, A., Jager, 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., Schadel, M., Schausten, B., Semchenkov, A., Shaughnessy, D. A., Steinegger, P., Steiner, J., Tereshatov, E. E., Thorle-Pospiech, P., Tinschert, K., Torres De Heidenreich, T., Trautmann, N., Turler, A., Uusitalo, J., Ward, D. E., Wegrzecki, M., Wiehl, N., Van Cleve, S. M., and Yakusheva, V.

Abstract

The superheavy element with atomic number Z=117 was produced as an evaporation residue in the (48)Ca+(249)Bk 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 (270)Db (Z = 105) was observed, which populated the new isotope (266)Lr (Z = 103). The identification of the long-lived (T(1/2) = 1.0(-0.4)(+1.9) h) α-emitter (270)Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an "island of stability."

Published
2014

58. New Short-Lived Isotope U-221 and the Mass Surface Near N=126

Author

Khuyagbaatar, J, Yakushev, A, Duellmann, Ch E, Ackermann, D, Andersson, L-L, Block, M, Brand, H, Cox, DM, Even, J, Forsberg, U, Golubev, P, Hartmann, W, Herzberg, R-D, Hessberger, FP, Hoffmann, J, Huebner, A, Jaeger, E, Jeppsson, J, Kindler, B, Kratz, JV, Krier, J, Kurz, N, Lommel, B, Maiti, M, Minami, S, Mistry, AK, Mrosek, Ch M, Pysmenetska, I, Rudolph, D, Sarmiento, LG, Schaffner, H, Schaedel, M, Schausten, B, Steiner, J, De Heidenreich, T Torres, Uusitalo, J, Wegrzecki, M, Wiehl, N, and Yakusheva, V

Abstract

Two short-lived isotopes 221U and 222U were produced as evaporation residues in the fusion reaction 50Ti+176Yb at the gas-filled recoil separator TASCA. An α decay with an energy of Eα=9.31(5) MeV and half-life T1/2=4.7(7) μs was attributed to 222U. The new isotope 221U was identified in α-decay chains starting with Eα=9.71(5) MeV and T1/2=0.66(14) μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.

Published
2015

59. GAS PHASE CHEMISTRY OF SUPERHEAVY ELEMENTS COUPLED TO AN ELECTROMAGNETIC SEPARATOR

Author

Yakushev, A., primary, Düllmann, Ch. E., additional, Asai, M., additional, Block, M., additional, David, H., additional, Despotopulos, J., additional, Di Nitto, A., additional, Eberhardt, K., additional, Forsberg, U., additional, Golubev, P., additional, Götz, M., additional, Götz, S., additional, Haba, H., additional, Harkness-Brennan, L., additional, Heβberger, F. P., additional, Herzberg, R.-D., additional, Hinde, D.J., additional, Hoffmann, J., additional, Hübner, A., additional, Jäger, E., additional, Judson, D., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Komori, Y., additional, Konki, J., additional, Kratz, J. V., additional, Krier, J., additional, Kurz, N., additional, Laatiaoui, M., additional, Lahiri, S., additional, Lens, L., additional, Lommel, B., additional, Lorentz, Ch., additional, Maiti, M., additional, Mistry, A. K., additional, Mokry, C., additional, Moody, K., additional, Nagame, Y., additional, Omtvedt, J. P., additional, Papadakis, P., additional, Pershina, V., additional, Rudolph, D., additional, Runke, J., additional, Schädel, M., additional, Scharrer, P., additional, Sarmiento, L. G., additional, Sato, T., additional, Shaughnessy, D., additional, Schausten, B., additional, Steiner, J., additional, Thörle-Pospiech, P., additional, Trautmann, N., additional, Tsukada, K., additional, Uusitalo, J., additional, Ward, A., additional, Wegrzecki, M., additional, Williams, E., additional, Wiehl, N., additional, and Yakusheva, V., additional

Published
2017
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60. New Short-Lived Isotope ^{221}U and the Mass Surface Near N=126

Author

Khuyagbaatar, J., Yakushev, A., Düllmann, Ch. E., Ackermann, D., Andersson, L.-L., Block, M., Brand, H., Cox, D. M., Even, J., Forsberg, Ulrika, Golubev, Pavel, Hartmann, W., Herzberg, R.-D., Heßberger, F. P., Hoffmann, J., Hübner, A., Jäger, E., Jeppsson, J., Kindler, B., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Maiti, M., Minami, S., Mistry, A. K., Mrosek, Ch. M., Pysmenetska, I., Rudolph, Dirk, Sarmiento, Luis, Schaffner, H., Schädel, M., Schausten, B., Steiner, J., De Heidenreich, T. Torres, Uusitalo, J., Wegrzecki, M., Wiehl, N., and Yakusheva, V.

Subjects
Shell Structure, Heavy Elements Shell Structure Sampling Electronics, Heavy Elements, Sampling Electronics, Subatomic Physics
Abstract

Two short-lived isotopes ^{221}U and ^{222}U were produced as evaporation residues in the fusion reaction ^{50}Ti+^{176}Yb at the gas-filled recoil separator TASCA. An α decay with an energy of E_{α}=9.31(5) MeV and half-life T_{1/2}=4.7(7) μs was attributed to ^{222}U. The new isotope ^{221}U was identified in α-decay chains starting with E_{α}=9.71(5) MeV and T_{1/2}=0.66(14) μs leading to known daughters. Synthesis and detection of these unstable heavy nuclei and their descendants were achieved thanks to a fast data readout system. The evolution of the N=126 shell closure and its influence on the stability of uranium isotopes are discussed within the framework of α-decay reduced width.

Published
2015

61. Recoil-alpha-fission and Recoil-alpha-alpha-fission Chains Stemming from Element 115

Author

Rudolph, D., Forsberg, U., Andersson, L., Block, M., Brand, H., Crox, D., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Fahlander, C., Gates, J. M., Düllmann, C. E., Gerl, J., Gregorich, E. K., Gross, C. J., Herzberg, R., Jäger, E., Kindler, B., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Golubev, P., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Runke, J., Rykaczewski, K., Schädel, M., Schaffner, H., Schausten, B., Hessberger, F., Thörle-Pospiech, P., Torres de Heidenreich, T., Traut, T., Trautmann, N., Thürler, A., Ward, A., Wiehl, N., Khuyagbaatar, J., Kratz, J. V., Sarmiento, L. G., Yakushev, A., and Ackermann, D.

Subjects
Physics, Subatomic Physics
Abstract

GSI Scientific Report 2014 - GSI Report 2015-1

Published
2015

62. Chemical Study of Fl, Cn, their Lighter Homologs and Rn at TASCA

Author

Yakushev, A., Lens, L., Di Nitto, A., Eberhardt, K., Even, J., Fan, F., Golubev, P., Haba, H., Hartmann, Willi, Herzberg, R., Hessberger, F., Hoffmann, J., Düllmann, C. E., Hübner, A., Jäger, E., Jadambaa, K., Kindler, B., Kratz, J. V., Krier, J., Kurz, N., Lahiri, S., Lommel, B., Maiti, M., Ackermann, D., Mistry, A., Mokry, C., Moody, K., Nagame, Y., Omtvedt, J. P., Papadakis, P., Qin, Z., Rudolph, D., Runke, J., Rusanov, I., Asai, M., Sarmiento, L. G., Sato, T., Schädel, M., Scharrer, P., Schausten, B., Shaughnessy, D., Steiner, J., Thörle-Pospiech, P., Trautmann, N., Uusitalo, J., Ballof, J., Ward, D., Wegrzecki, M., Whiel, N., Yakusheva, V., Block, M., Brand, H., Cox, D. M., and Despotopulos, J.

Subjects
Physics, Subatomic Physics
Abstract

GSI Scientific Report 2014 - GSI Report 2015-1

Published
2015

63. Online chemical study of Pb, Hg and Tl on SiO$_2$ and Au surfaces at TASCA

Author

Lens, L., Ballof, J., Hübner, A., Jäger, E., Jadambaa, Khuyagbaatar, Kindler, B., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Mokry, C., Runke, J., Yakushev, A., Scharrer, P., Schausten, B., Steiner, J., Thörle-Pospiech, P., Wegrzecki, M., Wiehl, N., Yakusheva, V., Düllmann, C. E., Brand, H., Derkx, X., Di Nitto, A., Even, J., Hartmann, W., and Hessberger, Fritz-Peter

Subjects
Physics
Abstract

GSI Scientific Report 2014 - GSI Report 2015-1

Published
2015
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64. ⁴⁸Ca+²⁴⁹Bk Fusion Reaction Leading to Element Z=117: Long-Lived alpha-Decaying ²⁷⁰Db and Discovery of ²⁶⁶Lr

Author

Khuyagbaatar, J, Yakushev, A, Duellmann, Ch E, 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, Huebner, A, Jaeger, 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, Schaedel, M, Schausten, B, Semchenkov, A, Shaughnessy, DA, Steinegger, P, Steiner, J, Tereshatov, EE, Thoerle-Pospiech, P, Tinschert, K, De Heidenreich, T Torres, Trautmann, N, Tuerler, A, Uusitalo, J, Ward, DE, Wegrzecki, M, Wiehl, N, Van Cleve, SM, and Yakusheva, V

Published
2014

65. Element 115 studied with TASISpec

Author

Rudolph, D., Forsberg, U., Gross, C. J., Herzberg, R.-D., Heßberger, F., Khuyagbaatar, J., Kratz, J. V., Rykaczewski, K., Schädel, M., Aberg, S., Ackermann, D., Block, M., Golubev, P., Brand, H., Carlsson, B. G., Cox, D., Derkx, X., Eberhardt, K., Even, J., Fahlander, C., Gerl, J., Jäger, E., Kindler, B., Sarmiento, L. G., Krier, J., Kojouharov, I., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Papadakis, P., Ragnarsson, I., Yakushev, A., Runke, J., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Torres, T., Traut, T., Trautmann, N., Türler, A., Ward, A., Ward, D. E., Andersson, L.-L., Wiehl, N., Di Nitto, A., Düllmann, C. E., Gates, J. M., and Gregorich, K. E.

Subjects
Physics
Abstract

GSI Scientific Report 2013 - GSI Report 2014-1

Published
2014
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66. 48Ca+249Bk Fusion Reaction Leading to Element Z=117: Long-Lived α-Decaying 270Db and Discovery of 266Lr

Author

Khuyagbaatar, J., Yakushev, A., Düllmann, Ch. 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, Claes, Forsberg, Ulrika, Gates, J. M., Gharibyan, N., Golubev, Pavel, 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, Dirk, Runke, J., Rykaczewski, K. P., Sarmiento, Luis, 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., and Yakusheva, V.

Subjects
superheavy elements, element 117, Subatomic Physics, alpha-decay
Abstract

The superheavy element with atomic number Z=117 was produced as an evaporation residue in the (48)Ca+(249)Bk 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 (270)Db (Z = 105) was observed, which populated the new isotope (266)Lr (Z = 103). The identification of the long-lived (T(1/2) = 1.0(-0.4)(+1.9) h) α-emitter (270)Db marks an important step towards the observation of even more long-lived nuclei of superheavy elements located on an "island of stability."

Published
2014

67. 48Ca+249Bk Fusion Reaction Leading to Element Z = 117: Long-Lived alpha-Decaying 270Db and Discovery of 266Lr

Author

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

Subjects
540 Chemistry, 570 Life sciences, biology
Published
2014
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68. Ca-48+Bk-249 Fusion Reaction Leading to Element Z=117: Long-Lived alpha-Decaying (270)Db and Discovery of Lr-266

Author

Khuyagbaatar, J, Yakushev, A, Duellmann, Ch E, 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, Huebner, A, Jaeger, E, Kindler, B, Kratz, JV, Krier, J, Kurz, N, Laatiaoui, Mustapha, 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, Schaedel, M, Schausten, B, Semchenkov, A, Shaughnessy, DA, Steinegger, P, Steiner, J, Tereshatov, EE, Thoerle-Pospiech, P, Tinschert, K, Torres De Heidenreich, T, Trautmann, N, Tuerler, A, Uusitalo, J, Ward, DE, Wegrzecki, M, Wiehl, N, Van Cleve, SM, and Yakusheva, V

Subjects
superheavy nuclei, separator, gsi, tasca, ca-48-inducted reactions, heaviest elements
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 294117 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.” ispartof: Physical Review Letters vol:112 issue:17 ispartof: location:United States status: published

Published
2014

69. Study of the $^{48}Ca + ^{249}Bk$ fusion reaction leading to element $Z = 117$: long-lived $\alpha$-decaying $^{270}Db$ and discovery of $^{266}Lr$

Author

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., Golubev, P., Gregorich, K. E., Hamilton, J. H., Hartmann, W., Herzberg, R.-D., Heßberger, F., 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., 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., and Yakusheva, V.

Subjects
Physics
Abstract

GSI Scientific Report 2013 - GSI Report 2014-1

Published
2014

70. New Short-Lived IsotopeU221and the Mass Surface NearN=126

Author

Khuyagbaatar, J., primary, Yakushev, A., additional, Düllmann, Ch. E., additional, Ackermann, D., additional, Andersson, L.-L., additional, Block, M., additional, Brand, H., additional, Cox, D. M., additional, Even, J., additional, Forsberg, U., additional, Golubev, P., additional, Hartmann, W., additional, Herzberg, R.-D., additional, Heßberger, F. P., additional, Hoffmann, J., additional, Hübner, A., additional, Jäger, E., additional, Jeppsson, J., additional, Kindler, B., additional, Kratz, J. V., additional, Krier, J., additional, Kurz, N., additional, Lommel, B., additional, Maiti, M., additional, Minami, S., additional, Mistry, A. K., additional, Mrosek, Ch. M., additional, Pysmenetska, I., additional, Rudolph, D., additional, Sarmiento, L. G., additional, Schaffner, H., additional, Schädel, M., additional, Schausten, B., additional, Steiner, J., additional, De Heidenreich, T. Torres, additional, Uusitalo, J., additional, Wegrzecki, M., additional, Wiehl, N., additional, and Yakusheva, V., additional

Published
2015
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71. The Superheavy Element Search Campaigns at TASCA

Author

Khuyagbaatar, J., Yakushev, A., Düllmann, C. E., Nitsche, H., Roberto, J., Ackermann, D., L Andersson, L., Asai, M., Brand, H., Block, M., Cox, D. M., Dasgupta, M., Derkx, X., Di Nitto, A., Dvorak, J., Eberhardt, K., Ellison, P. A., Esker, N. E., Even, J., Evers, M., Claes Fahlander, Ulrika Forsberg, Gates, J. M., Gharibyan, N., Gregorich, K. E., Pavel Golubev, Gothe, O., Hamilton, J. H., Hinde, D. J., Willi Hartmann, D Herzberg, R., Fritz-Peter Hessberger, Hoffmann, J., Hollinger, R., Hübner, A., Jäger, E., Jeppsson, J., Kindler, B., Klein, S., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lahiri, S., Lommel, B., Maiti, M., Miernik, K., Minami, S., Mistry, A., Mokry, C., Omtvedt, J. P., Pang, G. K., Papadakis, P., Pysmenetska, I., Renisch, D., Dirk Rudolph, Runke, J., Rykaczewski, K., Luis Sarmiento, Schädel, M., Schausten, B., Shaughnessy, D. A., Semchenkov, A., Steiner, J., Steinegger, P., Thörle-Pospiech, P., Tereshatov, E. E., Torres Heidenreich, T., Trautmann, N., Türler, A., Uusitalo, J., Daniel Ward, Wiehl, N., Wegrzecki, M., and Yakusheva, V.

Published
2013

72. Superheavy Element Flerovium is the Heaviest Volatile Metal

Author

Yakushev, A., Gates, J. M., Gorshkov, A., Graeger, R., Ackermann, D., Block, M., Brüchle, W., Düllmann, C. E., Essel, H. G., Fritz-Peter Hessberger, Hübner, A., Jäger, E., Khuyagbaatar, J., Kindler, B., Krier, J., Kurz, N., Lommel, B., Schädel, M., Schausten, B., Schimpf, E., Eberhardt, K., Eibach, M., Even, J., Hild, D., Kratz, J. V., Niewisch, L. J., Runke, J., Thörle-Pospiech, P., Wiehl, N., Dvorak, J., Nitsche, H., Omtvedt, J. P., Semchenkov, A., Ulrika Forsberg, Dirk Rudolph, Uusitalo, J., L Andersson, L., D Herzberg, R., Parr, E., Qin, Z., and Wegrzecki, M.

Published
2013

73. The reactions $^{50}$Ti+$^{206,208}$Pb studied at TASCA

Author

Khuyagbaatar, J., Yakushev, A., Kindler, B., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Omtvedt, J. P., Runke, J., Schädel, M., Schausten, B., Steiner, J., Ackermann, D., Türler, A., Wiehl, N., Yakusheva, V., Uusitalo, J., Andersson, L.-L., Block, M., Düllmann, C. E., Even, J., Hessberger, Fritz-Peter, Hübner, A., and Jäger, E.

Published
2013

74. Carbonyl Complex Formation of Short-Lived Ir and Re Isotopes

Author

Even, J., Yakushev, A., Krier, J., Niewisch, L., Nitsche, H., Pysmenetska, I., Schädel, M., Schausten, B., Türler, A., Wiehl, N., Wittwer, D., Düllmann, C. E., Dvorak, J., Eichler, R., Gothe, O., Hild, D., Jäger, E., Khuyagbaatar, J., and Kratz, J. V.

Published
2013

75. First Superheavy Element Experiments at the GSI Recoil Separator TASCA: The Production and Decay of Element 114 in the 244Pu(48Ca,3-4n) Reaction

Author

Gates, J. M., Duellmann, Ch E., Schaedel, M., Yakushev, A., Tuerler, A., Eberhardt, K., Kratz, J. V., Ackermann, D., Andersson, L. -L., Block, M., Bruechle, W., Dvorak, J., Essel, H. G., Ellison, P. A., Even, J., Forsberg, Ulrika, Gellanki, Jnaneswari, Gorshkov, A., Graeger, R., Gregorich, K. E., Hartmann, W., Herzberg, R. -D., Hessberger, F. P., Hild, D., Huebner, A., Jaeger, E., Khuyagbaatar, J., Kindler, B., Krier, J., Kurz, N., Lahiri, S., Liebe, D., Lommel, B., Maiti, M., Nitsche, H., Omtvedt, J. P., Parr, E., Rudolph, Dirk, Runke, J., Schaffner, H., Schausten, B., Schimpf, E., Semchenkov, A., Steiner, J., Thoerle-Pospiech, P., Uusitalo, J., Wegrzecki, M., and Wiehl, N.

Subjects
Subatomic Physics
Abstract

Experiments with the new recoil separator, Transactinide Separator and Chemistry Apparatus (TASCA), at the GSI were performed by using beams of Ca-48 to irradiate targets of Pb206-208, which led to the production of No252-254 isotopes. These studies allowed for evaluation of the performance of TASCA when coupled to a new detector and electronics system. By following these studies, the isotopes of element 114 ((288-291)114) were produced in irradiations of Pu-244 targets with Ca-48 beams at compound nucleus excitation energies around 41.7 and 37.5 MeV, demonstrating TASCA's ability to perform experiments with picobarn-level cross sections. A total of 15 decay chains were observed and were assigned to the decay of 288-291114. A new a-decay branch in (281)Ds was observed, leading to the new nucleus (277)Hs.

Published
2011

76. Selected spectroscopic results on element 115 decay chains

Author

Rudolph, D., primary, Forsberg, U., additional, Golubev, P., additional, Sarmiento, L. G., additional, Yakushev, A., additional, Andersson, L.-L., additional, Di Nitto, A., additional, Düllmann, Ch. E., additional, Gates, J. M., additional, Gregorich, K. E., additional, Gross, C. J., additional, Herzberg, R.-D., additional, Heßberger, F. P., additional, Khuyagbaatar, J., additional, Kratz, J. V., additional, Rykaczewski, K., additional, Schädel, M., additional, Åberg, S., additional, Ackermann, D., additional, Block, M., additional, Brand, H., additional, Carlsson, B. G., additional, Cox, D., additional, Derkx, X., additional, Eberhardt, K., additional, Even, J., additional, Fahlander, C., additional, Gerl, J., additional, Jäger, E., additional, Kindler, B., additional, Krier, J., additional, Kojouharov, I., additional, Kurz, N., additional, Lommel, B., additional, Mistry, A., additional, Mokry, C., additional, Nitsche, H., additional, Omtvedt, J. P., additional, Papadakis, P., additional, Ragnarsson, I., additional, Runke, J., additional, Schaffner, H., additional, Schausten, B., additional, Thörle-Pospiech, P., additional, Torres, T., additional, Traut, T., additional, Trautmann, N., additional, Türler, A., additional, Ward, A., additional, Ward, D. E., additional, and Wiehl, N., additional

Published
2014
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77. Ca48+Bk249Fusion Reaction Leading to ElementZ=117: Long-Livedα-DecayingDb270and Discovery ofLr266

Author

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

Published
2014
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78. Spectroscopy of Element 115 Decay Chains

Author

Rudolph, D., primary, Forsberg, U., additional, Golubev, P., additional, Sarmiento, L. G., additional, Yakushev, A., additional, Andersson, L.-L., additional, Di Nitto, A., additional, Düllmann, Ch. E., additional, Gates, J. M., additional, Gregorich, K. E., additional, Gross, C. J., additional, Heßberger, F. P., additional, Herzberg, R.-D., additional, Khuyagbaatar, J., additional, Kratz, J. V., additional, Rykaczewski, K., additional, Schädel, M., additional, Åberg, S., additional, Ackermann, D., additional, Block, M., additional, Brand, H., additional, Carlsson, B. G., additional, Cox, D., additional, Derkx, X., additional, Eberhardt, K., additional, Even, J., additional, Fahlander, C., additional, Gerl, J., additional, Jäger, E., additional, Kindler, B., additional, Krier, J., additional, Kojouharov, I., additional, Kurz, N., additional, Lommel, B., additional, Mistry, A., additional, Mokry, C., additional, Nitsche, H., additional, Omtvedt, J. P., additional, Papadakis, P., additional, Ragnarsson, I., additional, Runke, J., additional, Schaffner, H., additional, Schausten, B., additional, Thörle-Pospiech, P., additional, Torres, T., additional, Traut, T., additional, Trautmann, N., additional, Türler, A., additional, Ward, A., additional, Ward, D. E., additional, and Wiehl, N., additional

Published
2013
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79. Study of the average charge states of 188Pb and 252,254No ions at the gas-filled separator TASCA

Author

Khuyagbaatar, J., primary, Ackermann, D., additional, Andersson, L.-L., additional, Ballof, J., additional, Brüchle, W., additional, Düllmann, Ch.E., additional, Dvorak, J., additional, Eberhardt, K., additional, Even, J., additional, Gorshkov, A., additional, Graeger, R., additional, Heßberger, F.-P., additional, Hild, D., additional, Hoischen, R., additional, Jäger, E., additional, Kindler, B., additional, Kratz, J.V., additional, Lahiri, S., additional, Lommel, B., additional, Maiti, M., additional, Merchan, E., additional, Rudolph, D., additional, Schädel, M., additional, Schaffner, H., additional, Schausten, B., additional, Schimpf, E., additional, Semchenkov, A., additional, Serov, A., additional, Türler, A., additional, and Yakushev, A., additional

Published
2012
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80. First superheavy element experiments at the GSI recoil separator TASCA: The production and decay of element 114 in thePu244(Ca48,3-4n) reaction

Author

Gates, J. M., primary, Düllmann, Ch. E., additional, Schädel, M., additional, Yakushev, A., additional, Türler, A., additional, Eberhardt, K., additional, Kratz, J. V., additional, Ackermann, D., additional, Andersson, L.-L., additional, Block, M., additional, Brüchle, W., additional, Dvorak, J., additional, Essel, H. G., additional, Ellison, P. A., additional, Even, J., additional, Forsberg, U., additional, Gellanki, J., additional, Gorshkov, A., additional, Graeger, R., additional, Gregorich, K. E., additional, Hartmann, W., additional, Herzberg, R.-D., additional, Heßberger, F. P., additional, Hild, D., additional, Hübner, A., additional, Jäger, E., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Krier, J., additional, Kurz, N., additional, Lahiri, S., additional, Liebe, D., additional, Lommel, B., additional, Maiti, M., additional, Nitsche, H., additional, Omtvedt, J. P., additional, Parr, E., additional, Rudolph, D., additional, Runke, J., additional, Schaffner, H., additional, Schausten, B., additional, Schimpf, E., additional, Semchenkov, A., additional, Steiner, J., additional, Thörle-Pospiech, P., additional, Uusitalo, J., additional, Wegrzecki, M., additional, and Wiehl, N., additional

Published
2011
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81. Production and Decay of Element 114: High Cross Sections and the New NucleusHs277

Author

Düllmann, Ch. E., primary, Schädel, M., additional, Yakushev, A., additional, Türler, A., additional, Eberhardt, K., additional, Kratz, J. V., additional, Ackermann, D., additional, Andersson, L.-L., additional, Block, M., additional, Brüchle, W., additional, Dvorak, J., additional, Essel, H. G., additional, Ellison, P. A., additional, Even, J., additional, Gates, J. M., additional, Gorshkov, A., additional, Graeger, R., additional, Gregorich, K. E., additional, Hartmann, W., additional, Herzberg, R.-D., additional, Heßberger, F. P., additional, Hild, D., additional, Hübner, A., additional, Jäger, E., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Krier, J., additional, Kurz, N., additional, Lahiri, S., additional, Liebe, D., additional, Lommel, B., additional, Maiti, M., additional, Nitsche, H., additional, Omtvedt, J. P., additional, Parr, E., additional, Rudolph, D., additional, Runke, J., additional, Schausten, B., additional, Schimpf, E., additional, Semchenkov, A., additional, Steiner, J., additional, Thörle-Pospiech, P., additional, Uusitalo, J., additional, Wegrzecki, M., additional, and Wiehl, N., additional

Published
2010
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82. Experimental study of theU238(S36,3−5n)Hs269−271reaction leading to the observation ofHs270

Author

Graeger, R., primary, Ackermann, D., additional, Chelnokov, M., additional, Chepigin, V., additional, Düllmann, Ch. E., additional, Dvorak, J., additional, Even, J., additional, Gorshkov, A., additional, Heßberger, F. P., additional, Hild, D., additional, Hübner, A., additional, Jäger, E., additional, Khuyagbaatar, J., additional, Kindler, B., additional, Kratz, J. V., additional, Krier, J., additional, Kuznetsov, A., additional, Lommel, B., additional, Nishio, K., additional, Nitsche, H., additional, Omtvedt, J. P., additional, Petrushkin, O., additional, Rudolph, D., additional, Runke, J., additional, Samadani, F., additional, Schädel, M., additional, Schausten, B., additional, Türler, A., additional, Yakushev, A., additional, and Zhi, Q., additional

Published
2010
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83. Cross section limits for theCm248(Mg25,4n−5n)Hs268,269reactions

Author

Dvorak, J., primary, Brüchle, W., additional, Düllmann, Ch. E., additional, Dvorakova, Z., additional, Eberhardt, K., additional, Eichler, R., additional, Jäger, E., additional, Nagame, Y., additional, Qin, Z., additional, Schädel, M., additional, Schausten, B., additional, Schimpf, E., additional, Schuber, R., additional, Semchenkov, A., additional, Thörle, P., additional, Türler, A., additional, Wegrzecki, M., additional, and Yakushev, A., additional

Published
2009
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84. Search for the “missing” α-decay branch in 239Cm

Author

Qin, Zhi, primary, Brüchle, W., additional, Ackermann, D., additional, Eberhardt, Klaus, additional, Heßberger, F. P., additional, Jäger, E., additional, Kratz, Jens Volker, additional, Kuusiniemi, P., additional, Liebe, D., additional, Münzenberg, G., additional, Nayak, Dalia, additional, Novikov, Yu. N., additional, Schädel, M., additional, Schausten, B., additional, Schimpf, E., additional, Semchenkov, A., additional, Sulignano, B., additional, Thörle, P., additional, and Wu, X.L., additional

Published
2008
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85. Observation of the3nEvaporation Channel in the Complete Hot-Fusion ReactionMg26+Cm248Leading to the New Superheavy NuclideHs271

Author

Dvorak, J., primary, Brüchle, W., additional, Chelnokov, M., additional, Düllmann, Ch. E., additional, Dvorakova, Z., additional, Eberhardt, K., additional, Jäger, E., additional, Krücken, R., additional, Kuznetsov, A., additional, Nagame, Y., additional, Nebel, F., additional, Nishio, K., additional, Perego, R., additional, Qin, Z., additional, Schädel, M., additional, Schausten, B., additional, Schimpf, E., additional, Schuber, R., additional, Semchenkov, A., additional, Thörle, P., additional, Türler, A., additional, Wegrzecki, M., additional, Wierczinski, B., additional, Yakushev, A., additional, and Yeremin, A., additional

Published
2008
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86. Electrodeposition methods in superheavy element chemistry

Author

Hummrich, H., primary, Banik, N. L., additional, Breckheimer, M., additional, Brüchle, W., additional, Buda, R., additional, Feist, F., additional, Jäger, E., additional, Kratz, Jens Volker, additional, Kuczewski, B., additional, Liebe, D., additional, Niewisch, L., additional, Schädel, M., additional, Schausten, B., additional, Schimpf, E., additional, and Wiehl, N., additional

Published
2008
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87. Doubly Magic NucleusHs162108270

Author

Dvorak, J., primary, Brüchle, W., additional, Chelnokov, M., additional, Dressler, R., additional, Düllmann, Ch. E., additional, Eberhardt, K., additional, Gorshkov, V., additional, Jäger, E., additional, Krücken, R., additional, Kuznetsov, A., additional, Nagame, Y., additional, Nebel, F., additional, Novackova, Z., additional, Qin, Z., additional, Schädel, M., additional, Schausten, B., additional, Schimpf, E., additional, Semchenkov, A., additional, Thörle, P., additional, Türler, A., additional, Wegrzecki, M., additional, Wierczinski, B., additional, Yakushev, A., additional, and Yeremin, A., additional

Published
2006
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88. An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf

Author

Kratz, J. V., primary, Nähler, A., additional, Rieth, U., additional, Kronenberg, A., additional, Kuczewski, B., additional, Strub, E., additional, Brüchle, W., additional, Schädel, M., additional, Schausten, B., additional, Türler, A., additional, Gäggeler, H. W., additional, Jost, D. T., additional, Gregorich, K. E., additional, Nitsche, H., additional, Laue, C., additional, Sudowe, R., additional, and Wilk, P. A., additional

Published
2003
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90. Fluoride complexation of rutherfordium (Rf, element 104)

Author

Strub, E., primary, Kratz, Jens Volker, additional, Kronenberg, A., additional, Nähler, A., additional, Thörle, P., additional, Zauner, S., additional, Brüchle, W., additional, Jäger, E., additional, Schädel, M., additional, and Schausten, B., additional

Published
2000
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91. Chemical Properties of Element 105 in Aqueous Solution: Extraction of the Fluoride-, Chloride-, and Bromide Complexes of the Group-5 Elements into an Aliphatic Amine

Author

Paulus, W., primary, Kratz, J. V., additional, Strub, E., additional, Brüchle, W., additional, Pershina, V., additional, Schädel, M., additional, Schausten, B., additional, Adams, J. L., additional, Gregorich, Κ. E., additional, Hoffman, D. C., additional, Lane, M. R., additional, Laue, C., additional, Lee, D. M., additional, McGrath, C. A., additional, Shaughnessy, D. K., additional, Strellis, D. A., additional, and Sylwester, E. R., additional

Published
1999
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92. Extraction of the fluoride-, chloride- and bromide complexes of the elements Nb, Ta, Pa, and 105 into aliphatic amines

Author

Paulus, W., primary, Kratz, J.V., additional, Strub, E., additional, Zauner, S., additional, Brüchle, W., additional, Pershina, V., additional, Schädel, M., additional, Schausten, B., additional, Adams, J.L., additional, Gregorich, K.E., additional, Hoffman, D.C., additional, Lane, M.R., additional, Laue, C., additional, Lee, D.M., additional, McGrath, C.A., additional, Shaughnessy, D.K., additional, Strellis, D.A., additional, and Sylwester, E.R., additional

Published
1998
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93. Chromatographic studies of Rf (element 104) with tributylphosphate (TBP)

Author

Brüchle, W, primary, Jäger, E, additional, Pershina, V, additional, Schädel, M, additional, Schausten, B, additional, Günther, R, additional, Kratz, J.V, additional, Paulus, W, additional, Seibert, A, additional, Thörle, P, additional, Zauner, S, additional, Schumann, D, additional, Eichler, B, additional, Gäggeler, H, additional, Jost, D, additional, and Türler, A, additional

Published
1998
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94. Chromatographic Study of Rutherfordium (Element 104) in the System HCl/Tributylphosphate (TBP)

Author

Günther, R., primary, Paulus, W., additional, Kratz, J. V., additional, Seibert, A., additional, Thörle, P., additional, Zauner, S., additional, Brüchle, W., additional, Jäger, E., additional, Pershina, V., additional, Schädel, M., additional, Schausten, B., additional, Schumann, D., additional, Eichler, Β., additional, Gäggeler, H. W., additional, Jost, D. T., additional, and Türler, Α., additional

Published
1998
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96. First Aqueous Chemistry with Seaborgium (Element 106)

Author

Schädel, M., primary, Brüchle, W., additional, Schausten, B., additional, Schimpf, E., additional, Jäger, E., additional, Wirth, G., additional, Günther, R., additional, Kratz, J. V., additional, Paulus, W., additional, Seibert, A., additional, Thörle, P., additional, Trautmann, N., additional, Zauner, S., additional, Schumann, D., additional, Andrassy, M., additional, Misiak, R., additional, Gregorich, Κ. Ε., additional, Hoffman, D. C., additional, Lee, D. M., additional, Sylwester, E. R., additional, Nagame, Y., additional, and Oura, Y., additional

Published
1997
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97. Sorption of Subgroup IV, V and VI Elements on Ion Exchangers from HCl/HF Solutions. Model Experiments for Chemical Studies of the Elements 105 and 106 in Aqueous Solution

Author

Schumann, D., primary, Fischer, S., additional, Dressler, R., additional, Taut, St., additional, Nitsche, H., additional, Trautmann, N., additional, Schädel, M., additional, Brüchle, W., additional, Schausten, B., additional, Novgorodov, A. F., additional, Misiak, R., additional, Eichler, B., additional, Gäggeler, H., additional, Jost, D., additional, Türler, A., additional, and Bruchertseifer, H., additional

Published
1996
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98. Attempts to chemically investigate element 112

Author

Eichler, R., Brüchle, W., Buda, R., Bürger, S., Dressler, R., Düllmann, Ch. E., Dvorak, J., Eberhardt, K., Eichler, B., Folden, C. M., Gäggeler, H. W., Gregorich, K. E., Haenssler, F., Hoffman, D. C., Hummrich, H., Jäger, E., Kratz, J. V., Kuczewski, B., Liebe, D., Nayak, D., Nitsche, H., Piguet, D., Qin, Z., Rieth, U., Schädel, M., Schausten, B., Schimpf, E., Semchenkov, A., Soverna, S., Sudowe, R., Trautmann, N., Thörle, P., Türler, A., Wierczinski, B., Wiehl, N., Wilk, P. A., Wirth, G., Yakushev, A. B., and von Zweidorf, A.

Abstract

Two experiments aiming at the chemical investigation of element 112 produced in the heavy ion induced nuclear fusion reaction of 48Ca with 238U were performed at the Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany. Both experiments were designed to determine the adsorption enthalpy of element 112 on a gold surface using a thermochromatography setup. The temperature range covered in the thermochromatography experiments allowed the adsorption of Hg at about 35 °C and of Rn at about -180 °C. Reports from the Flerov Laboratory for Nuclear Reactions (FLNR), Dubna, Russia claim production of a 5-min spontaneous fission (SF) activity assigned to 283112 for the 238U(48Ca,3n) 283112 reaction. Hence, Experiment I was designed to detect spontaneously fissioning (SF) isotopes of element 112 with half-lives (t1/2) longer than about 20 s. 11 high-energy events were detected. 7 events exhibit a deposition pattern resembling a chromatographic peak in the vicinity of Rn deposition. However, the energy of the events observed in Experiment I was lower than expected for a SF-decay of 283112. Therefore, these events could not be unambiguously attributed to the decay of 283112. In contradiction with earlier publications newer reports from FLNR Dubna claim that 283112 decays by α-particle emission (Eα= 9.5 MeV) with t1/2= 4 s followed by a SF-decay of 279Ds (t1/2= 0.2 s). Therefore, Experiment II was designed to be sensitive to both claimed decay properties of 283112. However, during this experiment neither short α-SF correlations nor SF coincidences were detected. The conclusion is that 283112 was not unambiguously detected, neither in Experiment I nor in Experiment II.

Published
2006
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100. Recoil-α-fission and recoil-α–α-fission events observed in the reaction 48Ca + 243Am

Author

Nazarewicz, W., Ward, A., Fahlander, C., Ragnarsson, I., Schädel, M., Torres, T., Türler, Andreas, Derkx, X., Kurz, N., Runke, J., Lommel, B., Block, M., Even, J., Mokry, C., Khuyagbaatar, J., Trautmann, N., Heßberger, F.P., Di Nitto, A., Gross, C.J., Ward, D.E., Eberhardt, K., Kojouharov, I., Ackermann, D., Forsberg, U., Rykaczewski, K., Wiehl, N., Sarmiento, L.G., Cox, D., Krier, J., Traut, T., Gerl, J., Brand, H., Gates, J.M., Gregorich, K.E., Schausten, B., Rudolph, D., Andersson, L.-L., Nitsche, H., Herzberg, R.-D., Omtvedt, J.P., Mistry, A., Papadakis, P., Düllmann, Ch.E., Schaffner, H., Åberg, S., Carlsson, B.G., Jäger, E., Yakushev, A., Dobaczewski, J., Golubev, P., Kratz, J.V., Kindler, B., Thörle-Pospiech, P., and Shi, Yue

Subjects
540 Chemistry, 570 Life sciences, biology, Nuclear Experiment, 7. Clean energy
Abstract

Products of the fusion-evaporation reaction 48Ca + 243Am were studied with the TASISpec set-up at the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. Amongst the detected thirty correlated α -decay chains associated with the production of element Z=115Z=115, two recoil-α -fission and five recoil-α–αα–α-fission events were observed. The latter five chains are similar to four such events reported from experiments performed at the Dubna gas-filled separator, and three such events reported from an experiment at the Berkeley gas-filled separator. The four chains observed at the Dubna gas-filled separator were assigned to start from the 2n-evaporation channel 289115 due to the fact that these recoil-α–αα–α-fission events were observed only at low excitation energies. Contrary to this interpretation, we suggest that some of these recoil-α–αα–α-fission decay chains, as well as some of the recoil-α–αα–α-fission and recoil-α-fission decay chains reported from Berkeley and in this article, start from the 3n-evaporation channel 288115.

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