Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction

V. K. Utyonkov; N. T. Brewer; Yu Ts Oganessian; K. P. Rykaczewski; F. Sh Abdullin; S. N. Dmitriev; R. K. Grzywacz; M. G. Itkis; K. Miernik; A. N. Polyakov; J. B. Roberto; R. N. Sagaidak; I. V. Shirokovsky; M. V. Shumeiko; Yu S. Tsyganov; A. A. Voinov; V. G. Subbotin; A. M. Sukhov; A. V. Karpov; A. G. Popeko; A. V. Sabel'Nikov; A. I. Svirikhin; G. K. Vostokin; J. H. Hamilton; N. D. Kovrizhnykh; L. Schlattauer; M. A. Stoyer; Z. Gan; W. X. Huang; L. Ma

doi:10.1103/PhysRevC.97.014320

Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction

V. K. Utyonkov, N. T. Brewer, Yu Ts Oganessian, K. P. Rykaczewski, F. Sh Abdullin, S. N. Dmitriev, R. K. Grzywacz, M. G. Itkis, K. Miernik, A. N. Polyakov, J. B. Roberto, R. N. Sagaidak, I. V. Shirokovsky, M. V. Shumeiko, Yu S. Tsyganov, A. A. Voinov, V. G. Subbotin, A. M. Sukhov, A. V. Karpov, A. G. PopekoA. V. Sabel'Nikov, A. I. Svirikhin, G. K. Vostokin, J. H. Hamilton, N. D. Kovrizhnykh, L. Schlattauer, M. A. Stoyer, Z. Gan, W. X. Huang, L. Ma

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Abstract

We present new results from investigations of the Pu240+Ca48 reaction at a projectile energy of 250 MeV. Three new decay chains of Fl285 were detected with decay properties mostly consistent with those measured in earlier studies. An additional chain was observed where the nuclei may decay through energy levels different from those of the other six chains registered so far. The cross section of the Pu240(Ca48,3n)Fl285 reaction was measured to be 0.58-0.33+0.60pb, which is a factor of about 4-5 lower than that measured in the previous experiment at 245 MeV beam energy [V. K. Utyonkov et al., Phys. Rev. C 92, 034609 (2015).PRVCAN0556-281310.1103/PhysRevC.92.034609], consistent with expectations. The origin of an additional chain consisting of a recoil, α particle, and fission event is analyzed. The assignment of 25 short-lived SF events observed in this experiment is also discussed.

Original language	English
Article number	014320
Journal	Physical Review C
Volume	97
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.97.014320
State	Published - Jan 30 2018

Funding

We would like to express our gratitude to the personnel of the U400 cyclotron and the associates of the ion-source group for obtaining intense beams. The used in this research was partially supplied by the United States Department of Energy Office of Science by the Isotope Development and Production for Research and Applications Program in the Office of Nuclear Physics. These studies were supported by the Russian Foundation for Basic Research, including recent Grants No. 13-02-12052 and No. 16-52-55002. Research at ORNL was supported by the U.S. DOE Office of Nuclear Physics under DOE Contract No. DE-AC05-00OR22725 with UT Battelle, LLC. Research at LLNL was supported by LDRD Program Project No. 08-ERD-030, under DOE Contract No. DE-AC52-07NA27344 with Lawrence Livermore National Security, LLC. This work was also supported by the U.S. DOE through Grant No. DE-FG-05-88ER40407 (Vanderbilt University) and by the National Natural Science Foundation of China (Grant No. 11661131003).

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Utyonkov, V. K., Brewer, N. T., Oganessian, Y. T., Rykaczewski, K. P., Abdullin, F. S., Dmitriev, S. N., Grzywacz, R. K., Itkis, M. G., Miernik, K., Polyakov, A. N., Roberto, J. B., Sagaidak, R. N., Shirokovsky, I. V., Shumeiko, M. V., Tsyganov, Y. S., Voinov, A. A., Subbotin, V. G., Sukhov, A. M., Karpov, A. V., ... Ma, L. (2018). Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction. Physical Review C, 97(1), Article 014320. https://doi.org/10.1103/PhysRevC.97.014320

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title = "Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction",

abstract = "We present new results from investigations of the Pu240+Ca48 reaction at a projectile energy of 250 MeV. Three new decay chains of Fl285 were detected with decay properties mostly consistent with those measured in earlier studies. An additional chain was observed where the nuclei may decay through energy levels different from those of the other six chains registered so far. The cross section of the Pu240(Ca48,3n)Fl285 reaction was measured to be 0.58-0.33+0.60pb, which is a factor of about 4-5 lower than that measured in the previous experiment at 245 MeV beam energy [V. K. Utyonkov et al., Phys. Rev. C 92, 034609 (2015).PRVCAN0556-281310.1103/PhysRevC.92.034609], consistent with expectations. The origin of an additional chain consisting of a recoil, α particle, and fission event is analyzed. The assignment of 25 short-lived SF events observed in this experiment is also discussed.",

author = "Utyonkov, {V. K.} and Brewer, {N. T.} and Oganessian, {Yu Ts} and Rykaczewski, {K. P.} and Abdullin, {F. Sh} and Dmitriev, {S. N.} and Grzywacz, {R. K.} and Itkis, {M. G.} and K. Miernik and Polyakov, {A. N.} and Roberto, {J. B.} and Sagaidak, {R. N.} and Shirokovsky, {I. V.} and Shumeiko, {M. V.} and Tsyganov, {Yu S.} and Voinov, {A. A.} and Subbotin, {V. G.} and Sukhov, {A. M.} and Karpov, {A. V.} and Popeko, {A. G.} and Sabel'Nikov, {A. V.} and Svirikhin, {A. I.} and Vostokin, {G. K.} and Hamilton, {J. H.} and Kovrizhnykh, {N. D.} and L. Schlattauer and Stoyer, {M. A.} and Z. Gan and Huang, {W. X.} and L. Ma",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = jan,

day = "30",

doi = "10.1103/PhysRevC.97.014320",

language = "English",

volume = "97",

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Utyonkov, VK, Brewer, NT, Oganessian, YT, Rykaczewski, KP, Abdullin, FS, Dmitriev, SN, Grzywacz, RK, Itkis, MG, Miernik, K, Polyakov, AN, Roberto, JB, Sagaidak, RN, Shirokovsky, IV, Shumeiko, MV, Tsyganov, YS, Voinov, AA, Subbotin, VG, Sukhov, AM, Karpov, AV, Popeko, AG, Sabel'Nikov, AV, Svirikhin, AI, Vostokin, GK, Hamilton, JH, Kovrizhnykh, ND, Schlattauer, L, Stoyer, MA, Gan, Z, Huang, WX & Ma, L 2018, 'Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction', Physical Review C, vol. 97, no. 1, 014320. https://doi.org/10.1103/PhysRevC.97.014320

TY - JOUR

T1 - Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction

AU - Utyonkov, V. K.

AU - Brewer, N. T.

AU - Oganessian, Yu Ts

AU - Rykaczewski, K. P.

AU - Abdullin, F. Sh

AU - Dmitriev, S. N.

AU - Grzywacz, R. K.

AU - Itkis, M. G.

AU - Miernik, K.

AU - Polyakov, A. N.

AU - Roberto, J. B.

AU - Sagaidak, R. N.

AU - Shirokovsky, I. V.

AU - Shumeiko, M. V.

AU - Tsyganov, Yu S.

AU - Voinov, A. A.

AU - Subbotin, V. G.

AU - Sukhov, A. M.

AU - Karpov, A. V.

AU - Popeko, A. G.

AU - Sabel'Nikov, A. V.

AU - Svirikhin, A. I.

AU - Vostokin, G. K.

AU - Hamilton, J. H.

AU - Kovrizhnykh, N. D.

AU - Schlattauer, L.

AU - Stoyer, M. A.

AU - Gan, Z.

AU - Huang, W. X.

AU - Ma, L.

PY - 2018/1/30

Y1 - 2018/1/30

N2 - We present new results from investigations of the Pu240+Ca48 reaction at a projectile energy of 250 MeV. Three new decay chains of Fl285 were detected with decay properties mostly consistent with those measured in earlier studies. An additional chain was observed where the nuclei may decay through energy levels different from those of the other six chains registered so far. The cross section of the Pu240(Ca48,3n)Fl285 reaction was measured to be 0.58-0.33+0.60pb, which is a factor of about 4-5 lower than that measured in the previous experiment at 245 MeV beam energy [V. K. Utyonkov et al., Phys. Rev. C 92, 034609 (2015).PRVCAN0556-281310.1103/PhysRevC.92.034609], consistent with expectations. The origin of an additional chain consisting of a recoil, α particle, and fission event is analyzed. The assignment of 25 short-lived SF events observed in this experiment is also discussed.

AB - We present new results from investigations of the Pu240+Ca48 reaction at a projectile energy of 250 MeV. Three new decay chains of Fl285 were detected with decay properties mostly consistent with those measured in earlier studies. An additional chain was observed where the nuclei may decay through energy levels different from those of the other six chains registered so far. The cross section of the Pu240(Ca48,3n)Fl285 reaction was measured to be 0.58-0.33+0.60pb, which is a factor of about 4-5 lower than that measured in the previous experiment at 245 MeV beam energy [V. K. Utyonkov et al., Phys. Rev. C 92, 034609 (2015).PRVCAN0556-281310.1103/PhysRevC.92.034609], consistent with expectations. The origin of an additional chain consisting of a recoil, α particle, and fission event is analyzed. The assignment of 25 short-lived SF events observed in this experiment is also discussed.

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U2 - 10.1103/PhysRevC.97.014320

DO - 10.1103/PhysRevC.97.014320

M3 - Article

AN - SCOPUS:85041556202

SN - 2469-9985

VL - 97

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 014320

ER -

Neutron-deficient superheavy nuclei obtained in the Pu 240 + Ca 48 reaction

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