Short-Lived Isotopes of Transfermium Elements: Studying Characteristics of Spontaneous Fissioning

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

doi:10.3103/S1062873818060308

Short-Lived Isotopes of Transfermium Elements: Studying Characteristics of Spontaneous Fissioning

作者: Svirikhin A.I.¹, Yeremin A.V.¹, Andreev A.V.¹, Izosimov I.N.¹, Isaev A.V.¹, Kuznetsov A.N.¹, Kuznetsova A.A.¹, Malyshev O.N.¹, Popeko A.G.¹, Popov Y.A.¹, Sokol E.A.¹, Chelnokov M.L.¹, Chepigin V.I.¹, Schneidman T.M.¹, Gall B.², Dorvaux O.², Brione P.², Hauschild K.³, Lopez-Martenz A.³, Rezynkina K.³, Mullins S.⁴, Jones P.⁴, Mosat P.⁵, Andel B.⁵, Kalaninova Z.⁵, Asfari M.Z.⁵, Yoshihiro N.⁶, Piot J.⁷, Stefanova E.⁸, Tonev D.⁸
隶属关系:
1. Joint Institute for Nuclear Research
2. IPHC
3. CSNSM
4. iThemba LABS
5. Comenius University
6. Kyushu University
7. GANIL
8. INRNE
期: 卷 82, 编号 6 (2018)
页面: 632-636
栏目: Article
URL: https://journals.rcsi.science/1062-8738/article/view/185403
DOI: https://doi.org/10.3103/S1062873818060308
ID: 185403

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series of experiments performed in 2014–2015 using the SHELS separator and a beam of multicharged ions from the U-400 accelerator at the Flerov Laboratory of Nuclear Reactions (Joint Institute for Nuclear Research) in Dubna is described. In preparation for a large program of experiments with a beam of highly charged ions of ⁵⁰Ti, an experiment is performed to study the spontaneous fissioning (SF) of short-lived neutron-deficient isotope ²⁵⁶Rf formed in complete fusion reaction⁵⁰Ti + ²⁰⁸Pb = ²⁵⁶Rf + 2n. The half-life of ²⁵⁶Rf is measured along with the probability of its SF decay. The average number of neutrons per one event of ²⁵⁶Rf SF (\(\bar v\)= 4.47 ± 0.09) is obtained for the first time. The results from experiments to study the SF of short-lived neutron-deficient isotopes synthesized in complete fusion reaction ⁴⁸Ca + ²⁰⁴Pb → ²⁵²No* are presented as well. Two short-lived activities attributed to the SF of the ground and isomeric states of ²⁵⁰No are revealed. The half-life, total kinetic energies of fission fragments, and neutron multiplicities are measured for the obtained short-lived nuclei. The average numbers of neutrons per one SF event are \(\bar v\)= 4.38 ± 0.13 and \(\bar v\)= 3.90 ± 0.20, respectively, for SF activity with t_1/2 = 5.1 ± 0.3 and t_1/2 = 36 ± 3 μs.

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Short-Lived Isotopes of Transfermium Elements: Studying Characteristics of Spontaneous Fissioning

全文:

详细

作者简介

A. Svirikhin

A. Yeremin

A. Andreev

I. Izosimov

A. Isaev

A. Kuznetsov

A. Kuznetsova

O. Malyshev

A. Popeko

Y. Popov

E. Sokol

M. Chelnokov

V. Chepigin

T. Schneidman

B. Gall

O. Dorvaux

P. Brione

K. Hauschild

A. Lopez-Martenz

K. Rezynkina

S. Mullins

P. Jones

P. Mosat

B. Andel

Z. Kalaninova

M. Asfari

N. Yoshihiro

J. Piot

E. Stefanova

D. Tonev

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