Search for new isotopes of element 112 by irradiation of 238U with 48Ca

Yu Ts Oganessian; A. V. Yeremin; G. G. Gulbekian; S. L. Bogomolov; V. I. Chepigin; B. N. Gikal; V. A. Gorshkov; M. G. Itkis; A. P. Kabachenko; V. B. Kutner; A. Yu Lavrentev; O. N. Malyshev; A. G. Popeko; J. Roháč; R. N. Sagaidak; S. Hofmann; G. Münzenberg; M. Veselsky; S. Saro; N. Iwasa; K. Morita

doi:10.1007/s100500050257

Search for new isotopes of element 112 by irradiation of ²³⁸U with ⁴⁸Ca

Yu Ts Oganessian, A. V. Yeremin, G. G. Gulbekian, S. L. Bogomolov, V. I. Chepigin, B. N. Gikal, V. A. Gorshkov, M. G. Itkis, A. P. Kabachenko, V. B. Kutner, A. Yu Lavrentev, O. N. Malyshev, A. G. Popeko, J. Roháč, R. N. Sagaidak, S. Hofmann, G. Münzenberg, M. Veselsky, S. Saro, N. IwasaK. Morita

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Abstract

The reaction ⁴⁸Ca+²³⁸U was investigated at the recoil separator VASSILISSA at the Flerov Laboratory of Nuclear Reactions, JINR Dubna, in attempts to synthesize new isotopes of element 112. The experiments were performed at two beam energies resulting in excitation energies of the compound nucleus of 33 and 39 MeV. The collected beam dose was 3.5×10¹⁸ and 2.2×10¹⁸, respectively. Two spontaneous fission events were observed at the lower beam energy, which tentatively were assigned to the new neutron rich isotope ²⁸³112 produced in the reaction ²³⁸U(⁴⁸Ca,3n)²⁸³112. The measured cross-section is (5.0 ^+6.3_-3.2) pb and the half-life is (81 ⁺¹⁴⁷_-32) s. No event was observed at the higher beam energy resulting in the upper cross-section limit of 7.3 pb.

Original language	English
Pages (from-to)	63-68
Number of pages	6
Journal	European Physical Journal A
Volume	5
Issue number	1
DOIs	https://doi.org/10.1007/s100500050257
Publication status	Published - 1999 Jan 1
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/s100500050257

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Oganessian, Y. T., Yeremin, A. V., Gulbekian, G. G., Bogomolov, S. L., Chepigin, V. I., Gikal, B. N., Gorshkov, V. A., Itkis, M. G., Kabachenko, A. P., Kutner, V. B., Lavrentev, A. Y., Malyshev, O. N., Popeko, A. G., Roháč, J., Sagaidak, R. N., Hofmann, S., Münzenberg, G., Veselsky, M., Saro, S., ... Morita, K. (1999). Search for new isotopes of element 112 by irradiation of ²³⁸U with ⁴⁸Ca. European Physical Journal A, 5(1), 63-68. https://doi.org/10.1007/s100500050257

Oganessian, YT, Yeremin, AV, Gulbekian, GG, Bogomolov, SL, Chepigin, VI, Gikal, BN, Gorshkov, VA, Itkis, MG, Kabachenko, AP, Kutner, VB, Lavrentev, AY, Malyshev, ON, Popeko, AG, Roháč, J, Sagaidak, RN, Hofmann, S, Münzenberg, G, Veselsky, M, Saro, S, Iwasa, N & Morita, K 1999, 'Search for new isotopes of element 112 by irradiation of ²³⁸U with ⁴⁸Ca', European Physical Journal A, vol. 5, no. 1, pp. 63-68. https://doi.org/10.1007/s100500050257

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title = "Search for new isotopes of element 112 by irradiation of 238U with 48Ca",

abstract = "The reaction 48Ca+238U was investigated at the recoil separator VASSILISSA at the Flerov Laboratory of Nuclear Reactions, JINR Dubna, in attempts to synthesize new isotopes of element 112. The experiments were performed at two beam energies resulting in excitation energies of the compound nucleus of 33 and 39 MeV. The collected beam dose was 3.5×1018 and 2.2×1018, respectively. Two spontaneous fission events were observed at the lower beam energy, which tentatively were assigned to the new neutron rich isotope 283112 produced in the reaction 238U(48Ca,3n)283112. The measured cross-section is (5.0 +6.3-3.2) pb and the half-life is (81 +147-32) s. No event was observed at the higher beam energy resulting in the upper cross-section limit of 7.3 pb.",

author = "Oganessian, {Yu Ts} and Yeremin, {A. V.} and Gulbekian, {G. G.} and Bogomolov, {S. L.} and Chepigin, {V. I.} and Gikal, {B. N.} and Gorshkov, {V. A.} and Itkis, {M. G.} and Kabachenko, {A. P.} and Kutner, {V. B.} and Lavrentev, {A. Yu} and Malyshev, {O. N.} and Popeko, {A. G.} and J. Roh{\'a}{\v c} and Sagaidak, {R. N.} and S. Hofmann and G. M{\"u}nzenberg and M. Veselsky and S. Saro and N. Iwasa and K. Morita",

year = "1999",

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doi = "10.1007/s100500050257",

language = "English",

volume = "5",

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T1 - Search for new isotopes of element 112 by irradiation of 238U with 48Ca

AU - Oganessian, Yu Ts

AU - Yeremin, A. V.

AU - Gulbekian, G. G.

AU - Bogomolov, S. L.

AU - Chepigin, V. I.

AU - Gikal, B. N.

AU - Gorshkov, V. A.

AU - Itkis, M. G.

AU - Kabachenko, A. P.

AU - Kutner, V. B.

AU - Lavrentev, A. Yu

AU - Malyshev, O. N.

AU - Popeko, A. G.

AU - Roháč, J.

AU - Sagaidak, R. N.

AU - Hofmann, S.

AU - Münzenberg, G.

AU - Veselsky, M.

AU - Saro, S.

AU - Iwasa, N.

AU - Morita, K.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - The reaction 48Ca+238U was investigated at the recoil separator VASSILISSA at the Flerov Laboratory of Nuclear Reactions, JINR Dubna, in attempts to synthesize new isotopes of element 112. The experiments were performed at two beam energies resulting in excitation energies of the compound nucleus of 33 and 39 MeV. The collected beam dose was 3.5×1018 and 2.2×1018, respectively. Two spontaneous fission events were observed at the lower beam energy, which tentatively were assigned to the new neutron rich isotope 283112 produced in the reaction 238U(48Ca,3n)283112. The measured cross-section is (5.0 +6.3-3.2) pb and the half-life is (81 +147-32) s. No event was observed at the higher beam energy resulting in the upper cross-section limit of 7.3 pb.

AB - The reaction 48Ca+238U was investigated at the recoil separator VASSILISSA at the Flerov Laboratory of Nuclear Reactions, JINR Dubna, in attempts to synthesize new isotopes of element 112. The experiments were performed at two beam energies resulting in excitation energies of the compound nucleus of 33 and 39 MeV. The collected beam dose was 3.5×1018 and 2.2×1018, respectively. Two spontaneous fission events were observed at the lower beam energy, which tentatively were assigned to the new neutron rich isotope 283112 produced in the reaction 238U(48Ca,3n)283112. The measured cross-section is (5.0 +6.3-3.2) pb and the half-life is (81 +147-32) s. No event was observed at the higher beam energy resulting in the upper cross-section limit of 7.3 pb.

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Search for new isotopes of element 112 by irradiation of ²³⁸U with ⁴⁸Ca

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