Study of the properties of the superheavy nuclei Z = 117 produced in the 249Bk + 48Ca reaction

Yu Ts Oganessian; F. Sh Abdullin; C. Alexander; J. Binder; R. A. Boll; S. N. Dmitriev; J. Ezold; K. Felker; J. M. Gostic; R. K. Grzywacz; J. H. Hamilton; R. A. Henderson; M. G. Itkis; K. Miernik; D. Miller; K. J. Moody; A. N. Polyakov; A. V. Ramayya; J. B. Roberto; M. A. Ryabinin; K. P. Rykaczewski; R. N. Sagaidak; D. A. Shaughnessy; I. V. Shirokovsky; M. V. Shumeiko; M. A. Stoyer; N. J. Stoyer; V. G. Subbotin; A. M. Sukhov; Yu S. Tsyganov; V. K. Utyonkov; A. A. Voinov; G. K. Vostokin

doi:10.1051/epjconf/20146602073

Study of the properties of the superheavy nuclei Z = 117 produced in the ²⁴⁹Bk + ⁴⁸Ca reaction

Yu Ts Oganessian, F. Sh Abdullin, C. Alexander, J. Binder, R. A. Boll, S. N. Dmitriev, J. Ezold, K. Felker, J. M. Gostic, R. K. Grzywacz, J. H. Hamilton, R. A. Henderson, M. G. Itkis, K. Miernik, D. Miller, K. J. Moody, A. N. Polyakov, A. V. Ramayya, J. B. Roberto, M. A. RyabininK. P. Rykaczewski, R. N. Sagaidak, D. A. Shaughnessy, I. V. Shirokovsky, M. V. Shumeiko, M. A. Stoyer, N. J. Stoyer, V. G. Subbotin, A. M. Sukhov, Yu S. Tsyganov, V. K. Utyonkov, A. A. Voinov, G. K. Vostokin

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Abstract

The reaction of ²⁴⁹Bk with ⁴⁸Ca have been reinvestigated to provide new evidence for the discovery of element 117 on a larger number of events. The experiments were performed at five projectile energies and with a total beam dose of ⁴⁸Ca of about 4.6×10¹⁹. Two isotopes ^293,294117 were synthesized in the ²⁴⁹Bk+⁴⁸Ca reaction, providing excitation functions and α-decay spectra of the produced isotopes that establishes these nuclei to be the products of the 4n- and 3n-evaporation channels, respectively. Decay properties of ^293,294117 and of all the daughter products agree with the data of the experiment in which these nuclei were synthesized for the first time in 2010. The new ²⁸⁹115 events, populated by α decay of ²⁹³117, demonstrate the same decay properties as those observed for ²⁸⁹115 produced in the ²⁴³Am(⁴⁸Ca,2n) reaction thus providing crossbombardment evidence. In addition, a single decay of ²⁹⁴118 was observed from the reaction with ²⁴⁹Cf - a result of the in-growth of ²⁴⁹Cf in the ²⁴⁹Bk target.

Original language	English
Article number	02073
Journal	EPJ Web of Conferences
Volume	66
DOIs	https://doi.org/10.1051/epjconf/20146602073
State	Published - 2014
Event	2013 International Nuclear Physics Conference, INPC 2013 - Firenze, Italy Duration: Jun 2 2013 → Jun 7 2013

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Oganessian, Y. T., Abdullin, F. S., Alexander, C., Binder, J., Boll, R. A., Dmitriev, S. N., Ezold, J., Felker, K., Gostic, J. M., Grzywacz, R. K., Hamilton, J. H., Henderson, R. A., Itkis, M. G., Miernik, K., Miller, D., Moody, K. J., Polyakov, A. N., Ramayya, A. V., Roberto, J. B., ... Vostokin, G. K. (2014). Study of the properties of the superheavy nuclei Z = 117 produced in the ²⁴⁹Bk + ⁴⁸Ca reaction. EPJ Web of Conferences, 66, Article 02073. https://doi.org/10.1051/epjconf/20146602073

@article{19403dcf6f1f428f96f6d12fe081e05d,

title = "Study of the properties of the superheavy nuclei Z = 117 produced in the 249Bk + 48Ca reaction",

abstract = "The reaction of 249Bk with 48Ca have been reinvestigated to provide new evidence for the discovery of element 117 on a larger number of events. The experiments were performed at five projectile energies and with a total beam dose of 48Ca of about 4.6×1019. Two isotopes 293,294117 were synthesized in the 249Bk+48Ca reaction, providing excitation functions and α-decay spectra of the produced isotopes that establishes these nuclei to be the products of the 4n- and 3n-evaporation channels, respectively. Decay properties of 293,294117 and of all the daughter products agree with the data of the experiment in which these nuclei were synthesized for the first time in 2010. The new 289115 events, populated by α decay of 293117, demonstrate the same decay properties as those observed for 289115 produced in the 243Am(48Ca,2n) reaction thus providing crossbombardment evidence. In addition, a single decay of 294118 was observed from the reaction with 249Cf - a result of the in-growth of 249Cf in the 249Bk target.",

author = "Oganessian, {Yu Ts} and Abdullin, {F. Sh} and C. Alexander and J. Binder and Boll, {R. A.} and Dmitriev, {S. N.} and J. Ezold and K. Felker and Gostic, {J. M.} and Grzywacz, {R. K.} and Hamilton, {J. H.} and Henderson, {R. A.} and Itkis, {M. G.} and K. Miernik and D. Miller and Moody, {K. J.} and Polyakov, {A. N.} and Ramayya, {A. V.} and Roberto, {J. B.} and Ryabinin, {M. A.} and Rykaczewski, {K. P.} and Sagaidak, {R. N.} and Shaughnessy, {D. A.} and Shirokovsky, {I. V.} and Shumeiko, {M. V.} and Stoyer, {M. A.} and Stoyer, {N. J.} and Subbotin, {V. G.} and Sukhov, {A. M.} and Tsyganov, {Yu S.} and Utyonkov, {V. K.} and Voinov, {A. A.} and Vostokin, {G. K.}",

year = "2014",

doi = "10.1051/epjconf/20146602073",

language = "English",

volume = "66",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

publisher = "Italian Physical Society",

note = "2013 International Nuclear Physics Conference, INPC 2013 ; Conference date: 02-06-2013 Through 07-06-2013",

}

Oganessian, YT, Abdullin, FS, Alexander, C, Binder, J, Boll, RA, Dmitriev, SN, Ezold, J , Felker, K, Gostic, JM, Grzywacz, RK, Hamilton, JH, Henderson, RA, Itkis, MG, Miernik, K, Miller, D, Moody, KJ, Polyakov, AN, Ramayya, AV, Roberto, JB, Ryabinin, MA, Rykaczewski, KP, Sagaidak, RN, Shaughnessy, DA, Shirokovsky, IV, Shumeiko, MV, Stoyer, MA, Stoyer, NJ, Subbotin, VG, Sukhov, AM, Tsyganov, YS, Utyonkov, VK, Voinov, AA & Vostokin, GK 2014, 'Study of the properties of the superheavy nuclei Z = 117 produced in the ²⁴⁹Bk + ⁴⁸Ca reaction', EPJ Web of Conferences, vol. 66, 02073. https://doi.org/10.1051/epjconf/20146602073

TY - JOUR

T1 - Study of the properties of the superheavy nuclei Z = 117 produced in the 249Bk + 48Ca reaction

AU - Oganessian, Yu Ts

AU - Abdullin, F. Sh

AU - Alexander, C.

AU - Binder, J.

AU - Boll, R. A.

AU - Dmitriev, S. N.

AU - Ezold, J.

AU - Felker, K.

AU - Gostic, J. M.

AU - Grzywacz, R. K.

AU - Hamilton, J. H.

AU - Henderson, R. A.

AU - Itkis, M. G.

AU - Miernik, K.

AU - Miller, D.

AU - Moody, K. J.

AU - Polyakov, A. N.

AU - Ramayya, A. V.

AU - Roberto, J. B.

AU - Ryabinin, M. A.

AU - Rykaczewski, K. P.

AU - Sagaidak, R. N.

AU - Shaughnessy, D. A.

AU - Shirokovsky, I. V.

AU - Shumeiko, M. V.

AU - Stoyer, M. A.

AU - Stoyer, N. J.

AU - Subbotin, V. G.

AU - Sukhov, A. M.

AU - Tsyganov, Yu S.

AU - Utyonkov, V. K.

AU - Voinov, A. A.

AU - Vostokin, G. K.

PY - 2014

Y1 - 2014

N2 - The reaction of 249Bk with 48Ca have been reinvestigated to provide new evidence for the discovery of element 117 on a larger number of events. The experiments were performed at five projectile energies and with a total beam dose of 48Ca of about 4.6×1019. Two isotopes 293,294117 were synthesized in the 249Bk+48Ca reaction, providing excitation functions and α-decay spectra of the produced isotopes that establishes these nuclei to be the products of the 4n- and 3n-evaporation channels, respectively. Decay properties of 293,294117 and of all the daughter products agree with the data of the experiment in which these nuclei were synthesized for the first time in 2010. The new 289115 events, populated by α decay of 293117, demonstrate the same decay properties as those observed for 289115 produced in the 243Am(48Ca,2n) reaction thus providing crossbombardment evidence. In addition, a single decay of 294118 was observed from the reaction with 249Cf - a result of the in-growth of 249Cf in the 249Bk target.

AB - The reaction of 249Bk with 48Ca have been reinvestigated to provide new evidence for the discovery of element 117 on a larger number of events. The experiments were performed at five projectile energies and with a total beam dose of 48Ca of about 4.6×1019. Two isotopes 293,294117 were synthesized in the 249Bk+48Ca reaction, providing excitation functions and α-decay spectra of the produced isotopes that establishes these nuclei to be the products of the 4n- and 3n-evaporation channels, respectively. Decay properties of 293,294117 and of all the daughter products agree with the data of the experiment in which these nuclei were synthesized for the first time in 2010. The new 289115 events, populated by α decay of 293117, demonstrate the same decay properties as those observed for 289115 produced in the 243Am(48Ca,2n) reaction thus providing crossbombardment evidence. In addition, a single decay of 294118 was observed from the reaction with 249Cf - a result of the in-growth of 249Cf in the 249Bk target.

UR - http://www.scopus.com/inward/record.url?scp=84898729528&partnerID=8YFLogxK

U2 - 10.1051/epjconf/20146602073

DO - 10.1051/epjconf/20146602073

M3 - Conference article

AN - SCOPUS:84898729528

SN - 2101-6275

VL - 66

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 02073

T2 - 2013 International Nuclear Physics Conference, INPC 2013

Y2 - 2 June 2013 through 7 June 2013

ER -

Study of the properties of the superheavy nuclei Z = 117 produced in the ²⁴⁹Bk + ⁴⁸Ca reaction

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