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190 results on '"Svirikhin, A. I."'

2. Analysis of the shape of multiplicity distributions of prompt neutrons emitted in spontaneous fission

Author

Mukhin, R. S., Isaev, A. V., Andreev, A. V., Chelnokov, M. L., Chepigin, V. I., Devaraja, H. M., Gall, B., Hauschild, K., Izosimov, I. N., Kuznetsova, A. A., Lopez-Martens, A., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Rahmatinejad, A., Sailaubekov, B., Shneidman, T. M., Sokol, E. A., Svirikhin, A. I., Tezekbayeva, M. S., and Yeremin, A. V.

Published
2024
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3. Study of the production and decay properties of neutron-deficient nobelium isotopes

Author

Tezekbayeva, M. S., Yeremin, A. V., Svirikhin, A. I., Lopez-Martens, A., Chelnokov, M. L., Chepigin, V. I., Isaev, A. V., Izosimov, I. N., Karpov, A. V., Kuznetsova, A. A., Malyshev, O. N., Mukhin, R. S., Popeko, A. G., Popov, Yu. A., Rachkov, V. A., Sailaubekov, B. S., Sokol, E. A., Hauschild, K., Jacob, H., Chakma, R., Dorvaux, O., Forge, M., Gall, B., Kessaci, K., Andel, B., Antalic, S., Bronis, A., and Mosat, P.

Subjects
Nuclear Experiment
Abstract

The new neutron-deficient isotope $^{249}$No was synthesized for the first time in the fusion-evaporation reaction $^{204}$Pb($^{48}$Ca,3n)$^{249}$No. After separation, using the kinematic separator SHELS, the new isotope was identified with the GABRIELA detection system through genetic correlations with the known daughter and granddaughter nuclei $^{245}$Fm and $^{241}$Cf. The alpha-decay activity of $^{249}$No has an energy of 9129(22)$~$keV and half-life 38.3(2.8) ms. An upper limit of 0.2\% was measured for the fission branch of $^{249}$No. Based on the present data and recent information on the decay properties of $^{253}$Rf and aided by Geant4 simulations, the ground state of $^{249}$No is assigned the 5/2$^+$[622] neutron configuration and a partial decay scheme from $^{253}$Rf to $^{245}$Fm could be established. The production cross-section was found to be $\sigma$(3n)=0.47(4) nb at a mid-target beam energy of 225.4 MeV, which corresponds to the maximum of the calculated excitation function. Correlations of the $^{249}$No alpha activity with subsequent alpha decays of energy 7728(20) keV and half-life $1.2_{-0.4}^{+1.0}$ min provided a firm measurement of the electron-capture or $\beta^{+}$ branch of $^{245}$Fm to $^{245}$Es. The excitation function for the 1n, 2n and 3n evaporation channels was measured. In the case of the 2n-evaporation channel $^{250}$No, a strong variation of the ground state and isomeric state populations as a function of bombarding energy could be evidenced.

Published
2022
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4. Spontaneous fission of 246Fm

Author

Isaev, A. V., Mukhin, R. S., Andreev, A. V., Bychkov, M. A., Chelnokov, M. L., Chepigin, V. I., Devaraja, H. M., Dorvaux, O., Forge, M., Gall, B., Hauschild, K., Izosimov, I. N., Kessaci, K., Kuznetsova, A. A., Lopez-Martens, A., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Rahmatinejad, A., Sailaubekov, B., Shneidman, T. M., Sokol, E. A., Svirikhin, A. I., Testov, D. A., Tezekbayeva, M. S., Yeremin, A. V., Zamyatin, N. I., and Zhumadilov, K. Sh.

Subjects
Nuclear Experiment
Abstract

An experiment on the study of the $^{246}$Fm spontaneous fission was conducted using the SHELS separator. The isotope was synthesized in the complete fusion reaction of $^{40}$Ar beam ions and $^{208}$Pb target nuclei. The neutron yields of $^{246}$Fm spontaneous fission ($\overline{\nu} = 3.79\pm0.30$, $\sigma^{2}_{\nu} = 2.1$) were obtained using the SFiNx detector system. The multiplicity distribution of emitted prompt neutrons was restored using the Tikhonov method of statistical regularisation ($\overline{\nu}_{r} = 3.79\pm0.20$, $\sigma^{2}_{\nu r} = 2.8$). The spontaneous fission branching ratio ($b_{SF} = 0.061\pm0.005$) and the half-life ($T_{1/2} = 1.50^{+0.08}_{-0.07}$ s) of the isotope were determined. The experimental data were compared with scission point model predictions. Excellent convergence was observed in the average number of neutrons per spontaneous fission process. However, the forms of the experimental and model prompt neutron multiplicity distributions differ significantly.

Published
2022

5. Fission properties of $^{253}$Rf and the stability of neutron-deficient Rf isotopes

Author

Lopez-Martens, A., Hauschild, K., Svirikhin, A. I., Asfari, Z., Chelnokov, M. L., Chepigin, V. I., Dorvaux, O., Forge, M., Gall, B., Isaev, A. V., Izosimov, I. N., Kessaci, K., Kuznetsova, A. A., Malyshev, O. N., Mukhin, R. S, Popeko, A. G., Popov, Yu. A., Sailaubekov, B., Sokol, E. A., Tezekbayeva, M. S., and Yeremin, A. V.

Subjects
Nuclear Experiment
Abstract

An analysis of recent experimental data [J. Khuyagbaatar et al., Phys. Rev. C 104, L031303 (2021)] has established the existence of two fissioning states in $^{253}$Rf: the ground state and a low-lying isomeric state, most likely involving the same neutron single-particle configurations as in the lighter isotone $^{251}$No. The ratio of fission half-lives measured in $^{253}$Rf was used to predict the fission properties of the 1/2$^{+}$ isomeric state in $^{251}$No and draw conclusions as to the stability against fission of even lighter Rf systems. This paper focusses again on the fission properties of $^{253}$Rf and their impact on the stability of other neutron deficient isotopes, using new and improved data collected from two experiments performed at the Flerov Laboratory of Nuclear Reactions in Dubna, Russia. Two fission activities with half-lives of 52.8(4.4)$~\mu$s and 9.9(1.2) ms were measured in the case of $^{253}$Rf, confirming the results of J. Kkuyagbaatar et al. A third state, at much higher excitation energy, was also observed through the detection of its electromagnetic decay to the 52.8$~\mu$s state. This observation leads to the opposite quantum-configuration assignments for the fissioning states as compared to the ones established by J. Khuyagbaatar et al., namely that the higher-spin state has the shortest fission half-life. This inversion of the ratio of fission hindrances between the low and high-spin states is corroborated in the isotone $^{251}$No by the non observation of any substantial fission branch from the low-spin isomer.

Published
2022
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6. Alpha-decay spectroscopy of $^{257}$Rf

Author

Hauschild, K., Lopez-Martens, A., Chakma, R., Dorvaux, O., Gall, B., Chelnokov, M. L., Chepigin, V. I., Isaev, A. V., Izosimov, I. N., Katrasev, D. E., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Sokol, E. A., Svirikhin, A. I., Yeremin, A. V., Ackermann, D., Piot, J., Mosat, P., and Andel, B.

Subjects
Nuclear Experiment
Abstract

The decay properties of the ground state and excited states of $^{257}$Rf have been investigated with the detector array GABRIELA at the FLNR, Dubna. The electromagnetic decay of a new excited state in $^{253}$No has been observed. The state lies 750 keV above the ground state and is favourably populated in the alpha decay of the low-lying spin isomer of $^{257}$Rf. It decays to the 9/2$^-$ ground state by an M1 transition and is assigned the 11/2$^-$[725] Nilsson configuration. The presence of this state suggests a possible reinterpretation of the decay of the high-K isomer in $^{253}$No., Comment: 7 pages, 4 figures

Published
2021
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7. New front and back-end electronics for the upgraded GABRIELA detection system

Author

Hauschild, K., Chakma, R., Lopez-Martens, A., Rezynkina, K., Alaphillipe, V., Gibelin, L., Karkour, N., Linget, D., Yeremin, A. V., Popeko, A. G., Malyshev, O. N., Chepigin, V. I., Svirikhin, A. I., Isaev, A. V., Sokol, E. A., Chelnokov, M. L., Popov, Yu. A., Katrasev, D. E., Kuznetsov, A. N., Kuznetsova, A. A., Tezekbayeva, M. S., Dorvaux, O., Gall, B. J. P., Brionnet, P., Kessaci, K., and Mathieu, C.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The GABRIELA [1] set-up is used at the FLNR to perform detailed nuclear structure studies of transfermium nuclei. Following the modernization of the VASSILISSA separator (SHELS) [2] the GABRIELA detection system has also been upgraded. The characteristics of the upgraded detection system will be presented along with results from some recent electronics tests., Comment: 6 pages, 3 figure, 1 table uncorrected pre-print of EXON 2018 conference proceedings

Published
2019
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8. The SFiNx Detector System

Author

Isaev, A. V., Yeremin, A. V., Zamyatin, N. I., Izosimov, I. N., Kuznetsova, A. A., Malyshev, O. N., Mukhin, R. S., Popeko, A. G., Popov, Yu. A., Sailaubekov, B., Svirikhin, A. I., Sokol, E. A., Tezekbayeva, M. S., Testov, D. A., Chelnokov, M. L., Chepigin, V. I., Antalic, S., Mosat, P., Brionnet, P., Gall, B., Dorvaux, O., Kessaci, K., Sellam, A., Lopez-Martens, A., and Hauschild, K.

Published
2022
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11. Prompt neutron emission in the spontaneous fission of 246Fm

Author

Isaev, A. V., Mukhin, R. S., Andreev, A. V., Bychkov, M. A., Chelnokov, M. L., Chepigin, V. I., Devaraja, H. M., Dorvaux, O., Forge, M., Gall, B., Hauschild, K., Izosimov, I. N., Kessaci, K., Kuznetsova, A. A., Lopez-Martens, A., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Rahmatinejad, A., Sailaubekov, B., Shneidman, T. M., Sokol, E. A., Svirikhin, A. I., Testov, D. A., Tezekbayeva, M. S., Yeremin, A. V., Zamyatin, N. I., and Zhumadilov, K. Sh.

Published
2022
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12. Comparative Study of Spontaneous-Fission Characteristics of 252No and 254No Isotopes

Author

Isaev, A. V., Andreev, A. V., Chelnokov, M. L., Chepigin, V. I., Izosimov, I. N., Kuznetsova, A. A., Malyshev, O. N., Mukhin, R. S., Popeko, A. G., Popov, Y. A., Shneidman, T. M., Sokol, E. A., Svirikhin, A. I., Tezekbayeva, M. S., Yeremin, A. V., Zamyatin, N. I., Brionnet, P., Dorvaux, O., Gall, B., Kessaci, K., Sellam, A., Hauschild, K., Lopez-Martens, A., Antalic, S., and Mosat, P.

Published
2021
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13. The New 249No Isotope

Author

Svirikhin, A. I., Yeremin, A. V., Zamyatin, N. I., Izosimov, I. N., Isaev, A. V., Kuznetsova, A. A., Malyshev, O. N., Mukhin, R. S., Popeko, A. G., Popov, Y. A., Sokol, E. A., Sailaubekov, B., Tezekbayeva, M. S., Chelnokov, M. L., Chepigin, V. I., Andel, B., Antalic, S., Bronis, A., Mosat, P., Gall, B., Dorvaux, O., Lopez-Martens, A., and Hauschild, K.

Published
2021
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15. Prompt neutrons accompanying the spontaneous fission of 250No

Author

Sailaubekov, Bekzat, primary, Isaev, Andrey V., additional, Svirikhin, Alexander I., additional, Mukhin, Roman S., additional, Chelnokov, Maxim L., additional, Chepigin, Victor I., additional, Devaraja, Haleshappa M., additional, Izosimov, Igor N., additional, Kuznetsova, Alena A., additional, Malyshev, Oleg N., additional, Popeko, Andrey G., additional, Popov, Yury A., additional, Sokol, Eugene A., additional, Tezekbayeva, Merey S., additional, Yeremin, Alexander V., additional, Lopez-Martens, Araceli, additional, and Hauschild, Karl, additional

Published
2024
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16. Alpha-decay spectroscopy of 257Rf

Author

Hauschild, K., Lopez-Martens, A., Chakma, R., Chelnokov, M. L., Chepigin, V. I., Isaev, A. V., Izosimov, I. N., Katrasev, D. E., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Sokol, E. A., Svirikhin, A. I., Tezekbayeva, M. S., Yeremin, A. V., Asfari, Z., Dorvaux, O., Gall, B. J. P., Kessaci, K., Ackermann, D., Piot, J., Mosat, P., and Andel, B.

Published
2022
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19. Analysis of the shape of multiplicity distributions of prompt neutrons emitted in spontaneous fission

Author

Mukhin, R. S., primary, Isaev, A. V., additional, Andreev, A. V., additional, Chelnokov, M. L., additional, Chepigin, V. I., additional, Devaraja, H. M., additional, Gall, B., additional, Hauschild, K., additional, Izosimov, I. N., additional, Kuznetsova, A. A., additional, Lopez-Martens, A., additional, Malyshev, O. N., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Rahmatinejad, A., additional, Sailaubekov, B., additional, Shneidman, T. M., additional, Sokol, E. A., additional, Svirikhin, A. I., additional, Tezekbayeva, M. S., additional, and Yeremin, A. V., additional

Published
2023
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20. Prompt neutrons accompanying the spontaneous fission of 250No.

Author

Sailaubekov, Bekzat, Isaev, Andrey V., Svirikhin, Alexander I., Mukhin, Roman S., Chelnokov, Maxim L., Chepigin, Victor I., Devaraja, Haleshappa M., Izosimov, Igor N., Kuznetsova, Alena A., Malyshev, Oleg N., Popeko, Andrey G., Popov, Yury A., Sokol, Eugene A., Tezekbayeva, Merey S., Yeremin, Alexander V., Lopez-Martens, Araceli, and Hauschild, Karl

Abstract

This paper describes the experiment conducted on the SHELS (Separator for Heavy Element Spectroscopy) separator [1] aimed at studying the properties of spontaneous fission of 250No. A separator detection system consists of a time-of-flight system and SFiNx (Spontaneous Fission, Neutrons and x-rays) detection system [2] is described. The SFiNx detection system consists of an assembly of double-sided Si detectors, around which 116 proportional neutron counters filled with 3He are placed. During experiment, 1366 events of spontaneous fission of 250No were registered. The average number of neutrons per one fission ( v ¯ = 4.24 ± 0.13) and the distribution of neutron multiplicities were obtained, and the half-lives of the 250No were measured for the ground T1/2 = (3.89 ± 0.17) µs and isomeric states T1/2 = (39.14 ± 3.34) µs. [ABSTRACT FROM AUTHOR]

Published
2024
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21. GABRIELA : a new detector array for gamma-ray and conversion electron spectroscopy of transfermium elements

Author

Hauschild, K., Yeremin, A. V., Lopez-Martens, A., Dorvaux, O., Belozerov, A. V., Briancon, C., Chelnokov, M. L., Chepigin, V. I., Garcia-Santamaria, S. A., Gorshkov, V. A., Hanappe, F., Kabachenko, A. P., Korichi, A., Malyshev, O. N., Oganessian, Yu. Ts., Popeko, A. G., Rowley, N., Shutov, A. V., Stuttge, L., and Svirikhin, A. I.

Subjects
Nuclear Experiment
Abstract

With the aid of the Geant4 Monte Carlo simulation package a new detection system has been designed for the focal plane of the recoil separator VASSILISSA situated at the Flerov Laboratory of Nuclear Reactions, JINR, Dubna. GABRIELA (Gamma Alpha Beta Recoil Investigations with the Electromagnetic Analyser VASSILISSA) has been optimised to detect the arrival of reaction products and their subsequent radioactive decays involving the emission of alpha- and beta-particles, fission fragments, gamma- and X-rays, and conversion electrons. The new detector system is described and the results of the first commissioning experiments are presented., Comment: 24 pages, Submitted to NIM A

Published
2006
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22. Prompt Neutrons from Spontaneous 254Rf Fission

Author

Svirikhin, A. I., Andreev, A. V., Yeremin, A. V., Zamyatin, N. I., Izosimov, I. N., Isaev, A. V., Kuznetsov, A. N., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Popov, Y. A., Sokol, E. A., Tezekbayeva, M. S., Chelnokov, M. L., Chepigin, V. I., Schneidman, T. M., Andel, B., Antalic, S., Bronis, A., Mosat, P., Gall, B., Dorvaux, O., Retailleau, B. M., Hauschild, K., Lopez-Martenz, A., Chauveau, P., Stefanova, E., and Tonev, D.

Published
2019
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23. Measurement of the Production Cross Sections for Isotopes of Transfermium Elements in Complete Fusion Reactions with the Subsequent Evaporation of a Proton and Neutrons

Author

Yeremin, A. V., Tezekbayeva, M. S., Popeko, A. G., Malyshev, O. N., Lopez-Martens, A., Hauschild, K., Dorvaux, O., Gall, B., Isaev, A. V., Karpov, A. V., Kuznetsov, A. N., Kuznetsova, A. A., Popov, Yu. A., Svirikhin, A. I., Sokol, E. A., Chelnokov, M. L., Chepigin, V. I., and Moshat, P.

Published
2019
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25. Short-Lived Isotopes of Transfermium Elements: Studying Characteristics of Spontaneous Fissioning

Author

Svirikhin, A. I., Yeremin, A. V., Andreev, A. V., Izosimov, I. N., Isaev, A. V., Kuznetsov, A. N., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Popov, Y. A., Sokol, E. A., Chelnokov, M. L., Chepigin, V. I., Schneidman, T. M., Gall, B., Dorvaux, O., Brione, P., Hauschild, K., Lopez-Martenz, A., Rezynkina, K., Mullins, S., Jones, P., Mosat, P., Andel, B., Kalaninova, Z., Asfari, M. Z., Yoshihiro, N., Piot, J., Stefanova, E., and Tonev, D.

Published
2018
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26. Investigation of isomeric states in Rf255

Author

Chakma, R., primary, Lopez-Martens, A., additional, Hauschild, K., additional, Yeremin, A. V., additional, Malyshev, O. N., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Svirikhin, A. I., additional, Chepigin, V. I., additional, Sokol, E. A., additional, Isaev, A. V., additional, Kuznetsova, A. A., additional, Chelnokov, M. L., additional, Tezekbayeva, M. S., additional, Izosimov, I. N., additional, Dorvaux, O., additional, Gall, B., additional, and Asfari, Z., additional

Published
2023
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27. Characteristics of spontaneous fission of 250No

Author

Svirikhin, A. I., Andreev, A. V., Yeremin, A. V., Izosimov, I. N., Isaev, A. V., Kuznetsov, A. N., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Popov, Y. A., Sokol, E. A., Chelnokov, M. L., Chepigin, V. I., Schneidman, T. M., Gall, B., Dorvaux, O., Brione, P., Hauschild, K., Lopez-Martenz, A., Rezynkina, K., Mullins, S., Jones, P., and Mosat, P.

Published
2017
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28. Interaction of elemental mercury with selenium surfaces: model experiments for investigations of superheavy elements copernicium and flerovium

Author

Chiera, N. M., Aksenov, N. V., Albin, Y. V., Bozhikov, G. A., Chepigin, V. I., Dmitriev, S. N., Dressler, R., Eichler, R., Lebedev, V. Ya., Madumarov, A., Malyshev, O. N., Piguet, D., Popov, Y. A., Sabelnikov, A. V., Steinegger, P., Svirikhin, A. I., Türler, A., Vostokin, G. K., Vögele, A., and Yeremin, A. V.

Published
2017
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29. Prompt neutron emission in the spontaneous fission of $$^{246}$$Fm

Author

Isaev, A. V., primary, Mukhin, R. S., additional, Andreev, A. V., additional, Bychkov, M. A., additional, Chelnokov, M. L., additional, Chepigin, V. I., additional, Devaraja, H. M., additional, Dorvaux, O., additional, Forge, M., additional, Gall, B., additional, Hauschild, K., additional, Izosimov, I. N., additional, Kessaci, K., additional, Kuznetsova, A. A., additional, Lopez-Martens, A., additional, Malyshev, O. N., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Rahmatinejad, A., additional, Sailaubekov, B., additional, Shneidman, T. M., additional, Sokol, E. A., additional, Svirikhin, A. I., additional, Testov, D. A., additional, Tezekbayeva, M. S., additional, Yeremin, A. V., additional, Zamyatin, N. I., additional, and Zhumadilov, K. Sh., additional

Published
2022
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31. Experimental tests of the modernized VASSILISSA separator (SHELS) with the use of accelerated 50Ti ions

Author

Yeremin, A. V., Popeko, A. G., Malyshev, O. N., Gall, B., Asfari, Z., Lopez-Martens, A., Hauschild, K., Dorvaux, O., Gikal, B. N., Bogomolov, S. L., Loginov, V. N., Bondarchenko, A. E., Chepigin, V. I., Svirikhin, A. I., Isaev, A. V., Sokol, E. A., Chelnokov, M. L., Kuznetsov, A. N., Kuznetsova, A. A., Popov, Yu. A., Rezynkina, K., Dechery, F., Andel, B., Hofmann, S., Maurer, J., Heinz, S., and Rubert, J.

Published
2015
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32. First experimental tests of the modernized VASSILISSA separator

Author

Yeremin, A. V., Popeko, A. G., Malyshev, O. N., Lopez-Martens, A., Hauschild, K., Dorvaux, O., Gall, B., Chepigin, V. I., Svirikhin, A. I., Isaev, A. V., Sokol, E. A., Chelnokov, M. L., Kuznetsov, A. N., Kuznetsova, A. A., Belozerov, A. V., Rezynkina, K., Dechery, F., Le Blanc, F., Piot, J., Gehlot, J., Tonev, D., Stefanova, E., Pantelika, D., Nita, C., Andel, B., Mulins, S., Jones, P., and Ntshangase, S.

Published
2015
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33. Study of the production and decay properties of neutron-deficient nobelium isotopes

Author

Tezekbayeva, M. S., primary, Yeremin, A. V., additional, Svirikhin, A. I., additional, Lopez-Martens, A., additional, Chelnokov, M. L., additional, Chepigin, V. I., additional, Isaev, A. V., additional, Izosimov, I. N., additional, Karpov, A. V., additional, Kuznetsova, A. A., additional, Malyshev, O. N., additional, Mukhin, R. S., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Rachkov, V. A., additional, Sailaubekov, B. S., additional, Sokol, E. A., additional, Hauschild, K., additional, Jacob, H., additional, Chakma, R., additional, Dorvaux, O., additional, Forge, M., additional, Gall, B., additional, Kessaci, K., additional, Andel, B., additional, Antalic, S., additional, Bronis, A., additional, and Mosat, P., additional

Published
2022
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34. Spontaneous fission of 256Rf, new data

Author

Svirikhin, A. I., Yeremin, A. V., Izosimov, I. N., Isaev, A. V., Kuznetsov, A. N., Malyshev, O. N., Popeko, A. G., Popov, Yu. A., Sokol, E. A., Chelnokov, M. L., Chepigin, V. I., Andel, B., Asfari, M. Z., Gall, B., Yoshihiro, N., Kalaninova, Z., Mullins, S., Piot, J., Stefanova, E., and Tonev, D.

Published
2016
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35. Fission properties of Rf253 and the stability of neutron-deficient Rf isotopes

Author

Lopez-Martens, A., primary, Hauschild, K., additional, Svirikhin, A. I., additional, Asfari, Z., additional, Chelnokov, M. L., additional, Chepigin, V. I., additional, Dorvaux, O., additional, Forge, M., additional, Gall, B., additional, Isaev, A. V., additional, Izosimov, I. N., additional, Kessaci, K., additional, Kuznetsova, A. A., additional, Malyshev, O. N., additional, Mukhin, R. S., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Sailaubekov, B., additional, Sokol, E. A., additional, Tezekbayeva, M. S., additional, and Yeremin, A. V., additional

Published
2022
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37. Alpha-decay spectroscopy of $$^{257}$$Rf

Author

Hauschild, K., primary, Lopez-Martens, A., additional, Chakma, R., additional, Chelnokov, M. L., additional, Chepigin, V. I., additional, Isaev, A. V., additional, Izosimov, I. N., additional, Katrasev, D. E., additional, Kuznetsova, A. A., additional, Malyshev, O. N., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Sokol, E. A., additional, Svirikhin, A. I., additional, Tezekbayeva, M. S., additional, Yeremin, A. V., additional, Asfari, Z., additional, Dorvaux, O., additional, Gall, B. J. P., additional, Kessaci, K., additional, Ackermann, D., additional, Piot, J., additional, Mosat, P., additional, and Andel, B., additional

Published
2022
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38. Fine structure in the alpha decay of 224 U

Author

Lopez-Martens, A., Hauschild, K., Rezynkina, K., Dorvaux, O., Gall, B., Déchery, F., Faure, H., Yeremin, A. V., Chelnokov, M. L., Chepigin, V. I., Isaev, A. V., Izosimov, I. N., Katrasev, D. E., Kuznetsov, A. N., Kuznetsova, A. A., Malyshev, O. N., Popeko, A. G., Sokol, E. A., Svirikhin, A. I., Piot, J., and Rubert, J.

Published
2014
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39. Evidence of high- K isomerism in No154102256

Author

Kessaci, K., primary, Gall, B. J. P., additional, Dorvaux, O., additional, Lopez-Martens, A., additional, Chakma, R., additional, Hauschild, K., additional, Chelnokov, M. L., additional, Chepigin, V. I., additional, Forge, M., additional, Isaev, A. V., additional, Izosimov, I. N., additional, Katrasev, D. E., additional, Kuznetsova, A. A., additional, Malyshev, O. N., additional, Mukhin, R., additional, Piot, J., additional, Popeko, A. G., additional, Popov, Yu. A., additional, Sokol, E. A., additional, Svirikhin, A. I., additional, Tezekbayev, M. S., additional, and Yeremin, A. V., additional

Published
2021
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40. Study of complete and incomplete fusion for loosely bound projectiles 6He and 6Li on 165Ho and 166Er targets

Author

Fomichev, A. S., Chudoba, V., Daniel, A. V., Golovkov, M. S., Gorshkov, V. A., Krupko, S. A., Oganessian, Yu. Ts., Popeko, G. S., Sidorchuk, S. I., Slepnev, R. S., Ter-Akopian, G. M., Wolski, R., Chepigin, V. I., Katrasev, D. E., Malyshev, O. N., Svirikhin, A. I., Yeremin, A. V., Briançon, Ch., Hauschild, K., Korichi, A., Ha, M. -H., Hanappe, F., Dorvaux, O., and Stuttge, L.

Published
2012
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48. Isomeric states in 253No

Author

Lopez-Martens, A., Hauschild, K., Yeremin, A. V., Dorvaux, O., Belozerov, A. V., Briançon, Ch., Chelnokov, M. L., Chepigin, V. I., Curien, D., Désesquelles, P., Gall, B., Gorshkov, V. A., Guttormsen, M., Hanappe, F., Kabachenko, A. P., Khalfallah, F., Korichi, A., Larsen, A. C., Malyshev, O. N., Minkova, A., Oganessian, Yu. Ts., Popeko, A. G., Rousseau, M., Rowley, N., Sagaidak, R. N., Sharo, S., Shutov, A. V., Siem, S., Stuttgé, L., Svirikhin, A. I., Syed, N. U. H., and Theisen, Ch.

Published
2007
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49. Stability of the heaviest elements : K isomer in 250No

Author

Kallunkathariyil, J., Sulignano, B., Greenlees, P. T., Khuyagbaatar, J., Theisen, Ch., Auranen, K., Badran, H., Bisso, F., Brionnet, P., Briselet, R., Drouart, A., Favier, Z., Goigoux, T., Grahn, T., Hauschild, K., Herzan, A., Heßberger, F. P., Jakobsson, U., Julin, R., Juutinen, S., Konki, J., Leino, M., Lightfoot, A., Pakarinen, J., Papadakis, P., Partanen, J., Peura, P., Rahkila, P., Rezynkina, K., Ruotsalainen, P., Sandzelius, M., Saren, J., Scholey, C., Siciliano, M., Sorri, J., Stolze, S., Svirikhin, A. I., Uusitalo, J., Vandebrouck, M., Ward, A., Wraith, C., and Zielińska, M.

Subjects
isomer decays, ydinfysiikka, nuclear structure and decays
Abstract

Decay spectroscopy of 250No has been performed using digital electronics and pulse-shape analysis of the fast nuclear decays for the first time. Previous studies of 250No reported two distinct fission decay lifetimes, related to the direct fission of the ground state and to the decay of an isomeric state but without the possibility to determine if the isomeric state decayed directly via fission or via internal electromagnetic transitions to the ground state. The data obtained in the current experiment allowed the puzzle to finally be resolved, attributing the shorter half-life of t1/2 = 3.8 ± 0.3 μs to the ground state and the longer half-life t1/2 = 34.9+3.9 −3.2 μs to the decay of an isomeric state. 250No becomes, thus, one of a very few examples of very heavy nuclei with an isomeric state living considerably longer than its ground state. This phenomenon has important consequences for the nuclear-structure models aiming to determine the borders of the island of stability of superheavy elements. peerReviewed

Published
2020

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