NSR Query Results

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NSR database version of April 29, 2024.

Search: Author = Y.B.Ostapenko

Found 31 matches.

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1999GO10      Yad.Fiz. 62, No 6, 965 (1999); Phys.Atomic Nuclei 62, 901 (1999)

A.A.Goverdovsky, V.V.Ketlerov, V.F.Mitrofanov, Yu.B.Ostapenko, V.A.Khryachkov

Cold Fission of Neptunium: The role of an unpaired proton

NUCLEAR REACTIONS ²³⁷Np(n, F), E=1, 5 MeV; measured fission fragments mass, energy distributions; deduced role of unpaired proton.

1998GO13      Pisma Zh.Eksp.Teor.Fiz. 67, 752 (1998); JETP Lett. 67, 793 (1998)

A.A.Goverdovsky, V.V.Ketlerov, V.F.Mitrofanov, Yu.B.Ostapenko, V.A.Khryachkov

Observation of Truly Cold Fragmentation of a Heavy Nucleus

NUCLEAR REACTIONS ²³²Th(n, F), E=5 MeV; measured fragments mass-energy-charge correlations; deduced cold fragmentation for Te/Sr pair.

doi: 10.1134/1.567750
Citations: PlumX Metrics

1997GO17      Yad.Fiz. 60, No 9, 1586 (1997); Phys.Atomic Nuclei 60, 1441 (1997)

A.A.Goverdovsky, V.A.Khryachkov, V.V.Ketlerov, V.F.Mitrofanov, Yu.B.Ostapenko

Temperature Effects in Prescission-Deformation Spectra of ²³⁸Np Fission Fragments

NUCLEAR REACTIONS ²³⁷Np(n, F), E=1, 18 MeV; measured fission fragment mass, kinetic energy distributions; deduced prescission temperature effects.

1997KE06      Nucl.Phys. A621, 243c (1997)

V.V.Ketlerov, A.A.Goverdovsky, V.A.Khryachkov, V.F.Mitrofanov, Yu.B.Ostapenko, R.C.Haight, P.E.Koehler, S.M.Grimes, R.S.Smith

Detailed Study of Double-Differential Cross-Sections for the ¹⁷O(n, α)¹⁴C Reaction

NUCLEAR REACTIONS ¹⁷O(n, γ), E < 1.01 MeV; measured α spectra, σ(θ).

doi: 10.1016/S0375-9474(97)00246-7
Citations: PlumX Metrics

1994BO53      Ann.Nucl.Energy 21, 585 (1994)

G.S.Boikov, V.D.Dmitriev, G.A.Kudyaev, V.M.Maslov, Yu.B.Ostapenko, M.I.Svirin, G.N.Smirenkin

Peculiarities in the Neutron Spectra Accompanying Neutron-Induced Emission Fission of Actinide Nuclei

NUCLEAR REACTIONS ²³²Th, ^235,238U, ²³⁷Np(n, F), E=2.9-14.7 MeV; measured neutron spectra following fission; deduced nonequilibrium neutron emission evidence. Statistical model with, without nonequilibrium emission.

doi: 10.1016/0306-4549(94)90068-X
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41171.

1994GO51      Proc.Intern.Conf.Nuclear Data for Science and Technology, Gatlinburg, Tennesse, 9-13 May, 1994, J.K.Dickens, Ed., American Nuclear Society, Vol.1, p.117 (1994)

A.A.Goverdovski, V.A.Khryachkov, V.V.Ketlerov, V.F.Mitrofanov, H.Vonach, R.C.Haight, Yu.B.Ostapenko

(n, α) reaction studies using a gridded ionization chamber

NUCLEAR REACTIONS ⁵⁸Ni(n, α), E=-1.0 eV-6.8 MeV; measured products , ⁵⁵Fe, ⁴He; deduced σ, σ(E), σ(θ). Data were imported from EXFOR entry 41561.

1994KU47      At.Energ. 76, 201 (1994); Sov.At.Energy 76, 199 (1994)

G.A.Kudyaev, Yu.B.Ostapenko, G.N.Smirenkin

Theoretical Estimate of the Fast-Neutron Fission Cross Sections of ^235,238U

NUCLEAR REACTIONS ^235,238U(n, F), E=fast; analyzed fission σ(E).

1993KU03      Yad.Fiz. 56, No 1, 51 (1993); Phys.Atomic Nuclei 56, 29 (1993)

G.A.Kudyaev, Yu.B.Ostapenko, V.V.Pashkevich, M.I.Svirin, G.N.Smirenkin

Description and Analysis of the Chance Structure in the Cross Section for Neutron-Induced Emission Fission of ^233-238U

NUCLEAR REACTIONS ^{233,235,238,236,234,232}U(n, F), E ≤ 20 MeV; ²³⁸U(n, 2n'), E ≤ 20 MeV; analyzed fission σ(E). ²³⁹U deduced fission mechanism.

1991BO17      Yad.Fiz. 53, 628 (1991); Sov.J.Nucl.Phys. 53, 392 (1991)

G.S.Boikov, V.D.Dmitriev, G.A.Kudyaev, Yu.B.Ostapenko, M.I.Svirin, G.N.Smirenkin

Spectrum of Neutrons Accompanying Fission of ²³²Th, ²³⁵U, and ²³⁸U by 2.9-MeV and 14.7-MeV Neutrons (Below and Above the Threshold of Emission Fission)

NUCLEAR REACTIONS ²³²Th, ^235,238U(n, F), E=2.9, 14.7 MeV; measured fission neutron spectra; deduced emission mechanism features.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41110.

1991BO25      Z.Phys. A340, 79 (1991)

G.S.Boikov, V.D.Dmitriev, G.A.Kudyaev, Yu.B.Ostapenko, M.I.Svirin, G.N.Smirenkin

New Data on Prefission Neutrons

NUCLEAR REACTIONS ²³²Th, ^235,238U(n, F), E=2.9, 14.7 MeV; measured neutron spectra following fission; deduced fission dynamics role.

doi: 10.1007/BF01284483
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41110.

1991RA17      Yad.Fiz. 53, 1200 (1991); Sov.J.Nucl.Phys. 53, 741 (1991)

E.M.Rastopchin, S.I.Mulgin, Yu.B.Ostapenko, V.V.Pashkevich, M.I.Svirin, G.N.Smirenkin

Statistical and Dynamical Aspects of Preactinide Fissility

NUCLEAR STRUCTURE ^{186,187,188,191}Os, ^193,196,197Pt, ^{198,199,200,202}Hg, ^{206,205,207,208}Pb, ¹⁷³Lu, ²¹²Po; A=160-220; analyzed fission data; deduced fissility features.

NUCLEAR REACTIONS Ag(³He, F), E not given; ¹⁹⁷Au(α, F), E=32.6-47.5 MeV; analyzed fission data; deduced fissility features.

1989RA05      Yad.Fiz. 49, 24 (1989)

E.M.Rastopchin, Yu.B.Ostapenko, M.I.Svirin, G.N.Smirenkin

Nuclear Surface Effect on Level Density and Fusion Probability

NUCLEAR STRUCTURE ¹⁷⁹Ta; analyzed neutron resonance level density, fissionability; deduced asymptotic parameter role.

1988KU04      Yad.Fiz. 47, 341 (1988)

G.A.Kudyaev, Yu.B.Ostapenko, M.I.Svirin, G.N.Smirenkin

A Possibility of Determination of the Level Density Asymptotic Parameter

NUCLEAR STRUCTURE ²¹³At, ^212,210,208Po, ²⁰⁷Bi, ²⁰¹Tl; analyzed fissionability; deduced level density asymptotic parameter.

1988KU13      Yad.Fiz. 47, 1540 (1988)

G.A.Kudyaev, Yu.B.Ostapenko, E.M.Rastopchin, G.N.Smirenkin

Fissionability of Nuclei and Damping of Rotational Contribution to Level Density

NUCLEAR STRUCTURE ¹⁸⁹Ir, ¹⁷⁹Ta, ¹⁷³Lu; analyzed fission probability; deduced rotational mode contribution to level density.

1987KU11      Yad.Fiz. 45, 1534 (1987)

G.A.Kudyaev, Yu.B.Ostapenko, G.N.Smirenkin

Thresholds and Saddle Shapes in Symmetrical and Asymmetrical Fission in the Ra Range

NUCLEAR REACTIONS ²²⁶Ra(n, F), (³He, dF), ²²⁷Ac(n, F), E=7-10 MeV; analyzed fission fragment angular anisotropies, fissionabilities. ²²⁷Ra, ^228,227Ac deduced thresholds, saddle shapes. Statistical approach.

1984IG02      Yad.Fiz. 40, 1404 (1984)

A.V.Ignatyuk, M.G.Itkis, I.A.Kamenev, S.I.Mulgin, V.N.Okolovich, Yu.B.Ostapenko, G.N.Smirenkin

Analysis of Fissility and Fission Barriers of Pre-Actinide Nuclei

NUCLEAR REACTIONS ²⁰⁹Bi, ^{204,206,207,208}Pb(e, F), E=30-50 MeV; analyzed fission yield vs E. Superfluid model.

NUCLEAR STRUCTURE A=170-213; analyzed fission data; deduced nuclear masses, deformation energy isospin parameter modification.

1983AN20      Yad.Fiz. 38, 832 (1983)

Kh.D.Androsenko, Yu.A.Nemilov, Yu.B.Ostapenko, V.A.Rubchenya, Yu.A.Selitsky, G.N.Smirenkin, V.B.Funstein, S.V.Khlebnikov, V.A.Yakovlev

Angular Anisotropy of Fragments in Neutron Induced Fission of ²²⁶Ra and ²²⁷Ac near the Threshold

NUCLEAR REACTIONS ²²⁶Ra, ²²⁷Ac(n, F), E=3.7-5 MeV; measured fission fragment σ(θ); deduced near barrier angular anisotropy energy, Z dependences. Other data input.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset40669.

1983OS06      Pisma Zh.Eksp.Teor.Fiz. 37, 556 (1983); JETP Lett.(USSR) 37, 666 (1983)

Yu.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Yu.M.Tsipenyuk

Search for an Isomer Shelf in ²³²Th Photofission

NUCLEAR REACTIONS ²³²Th(γ, F), E=3.3-4.8 MeV bremsstrahlung; measured fission fragment σ(θ), fission yield vs E; deduced no delayed fission, isomer shelf effects.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0075.

1981OS08      Phys.Rev. C24, 529 (1981)

Yu.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Yu.M.Tsypenyuk

Isomer Shelf in the Photofission of ²³²Th and ²³⁸U

NUCLEAR REACTIONS, Fission ²³²Th, ²³⁸U(γ, F), E=3-6 MeV; calculated fission yields, prompt, delayed fission probabilities. Doorway state model.

doi: 10.1103/PhysRevC.24.529
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0075.

1979ZH01      Yad.Fiz. 30, 634 (1979); Sov.J.Nucl.Phys. 30, 326 (1979)

V.E.Zhuchko, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Properties of the Angular Anisotropy of Deep Sub-Barrier Photofission Of Even-Even Nuclei

NUCLEAR REACTIONS ²³²Th, ^236,238U(γ, F), E=4-7 MeV bremsstrahlung; measured σ(fragment θ); deduced subbarrier photofission effects. Two-hump fission barrier model.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0077.

1978ZH03      Yad.Fiz. 28, 1170 (1978); Sov.J.Nucl.Phys. 28, 602 (1978)

V.E.Zhuchko, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Study of the Probability of Near-Threshold Fission of the Isotopes of Th, U, Np, Pu, and Am by Bremsstrahlung

NUCLEAR REACTIONS ²³²Th, ^{233,235,236,238}U, ²³⁷Np, ^239,241Pu, ²⁴¹Am(γ, F), E=4.4-7.0 MeV [from bremsstrahlung]; measured σ(fission); discussed resonance structure, effect of two-hump barrier. Compared fissility in (γ, F), (n, F), direct reactions.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0078.

1978ZH04      Yad.Fiz. 28, 1185 (1978); Sov.J.Nucl.Phys. 28, 611 (1978)

V.E.Zhuchko, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Experimental Investigation of the Isomeric-Shelf Phenomenon in the Photofission Cross Sections of Heavy Nuclei

NUCLEAR REACTIONS ²³²Th, ^236,238U, ²³⁷Np(γ, F), E=3.5-4.6 MeV; measured σ(fission). ^236,238U deduced evidence for resonance character of delayed fission.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0079.

1978ZH07      Yad.Fiz. 27 1420 (1978); Phys.Atomic Nuclei 27, 746 (1978)

V.E.Zhuchko, Yu.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Yu.M.Tsipenyuk

Angular distribution of fragments from photofission of ²³⁵U

NUCLEAR REACTIONS ²³⁵U(γ, F), E<13.5 MeV; measured fission fragments; deduced σ(θ).

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0016.

1977ZH01      Phys.Lett. 68B, 323 (1977)

V.E.Zhuchko, A.V.Ignatyuk, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Deep Subbarrier Anomalies in the Photofission of Heavy Nuclei

NUCLEAR REACTIONS ^236,238U(e, F), E=3-7 MeV; measured fission yields.

doi: 10.1016/0370-2693(77)90485-3
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0080.

1977ZH06      Pisma Zh.Eksp.Teor.Fiz. 26, 718 (1977); JETP Lett.(USSR) 26, 553 (1978)

V.E.Zhuchko, S.P.Kapitza, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Quadrupole Photofission of ²³²Th and Role of Symmetry of the Nucleus in the Fission Process

NUCLEAR REACTIONS ²³²Th(γ, F), E=5-7 MeV; measured fragment σ(θ). Increased quadrupole component below photofission barriers.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0086.

1976ZH02      Nucl.Instrum.Methods 136, 373 (1976)

V.E.Zhuchko, Y.B.Ostapenko, A.S.Soldatov, Y.M.Tsipenyuk

Restoration of Photofission Cross-Sections from Bremsstrahlung Experiments

NUCLEAR REACTIONS ^235,238U(γ, F), E=3.6-7 MeV; calculated σ(E).

doi: 10.1016/0029-554X(76)90222-6
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0084.

1976ZH03      Pisma Zh.Eksp.Teor.Fiz. 24, 309 (1976); JETP Lett.(USSR) 24, 277 (1976)

V.E.Zhuchko, A.V.Ignatyuk, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Angular Distributions of Photofission Fragments of ²³⁸U in the Region Of the Isomer Shelf

NUCLEAR REACTIONS ²³⁸U(γ, F), E ≤ 5.2 MeV bremsstrahlung; measured fragment (θ). ²³⁸U deduced structure.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0083.

1975ZH02      Pisma Zh.Eksp.Teor.Fiz. 22, 255 (1975); JETP Lett.(USSR) 22, 118 (1976)

V.E.Zhuchko, A.V.Ignatyuk, Y.B.Ostapenko, G.N.Smirenkin, A.S.Soldatov, Y.M.Tsipenyuk

Isomer Shells in the Cross Section of Deep Subbarrier Photofission of Heavy Nuclei

NUCLEAR REACTIONS ²³²Th, ²³⁷Np, ²³⁸U(γ, F), E=3.8-5.5 MeV; measured yields; deduced isomer shelf characteristics.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0004.

1972SH16      Pisma Zh.Eksp.Teor.Fiz. 15, 323 (1972); JETP Lett.(USSR) 15, 228 (1972)

D.L.Shpak, A.I.Blokhin, Y.B.Ostapenko, G.N.Smirenkin

Angular Anisotropy of the Fragments from Fission of Th²³² and Pu²³⁸ by 13.40-14.80 MeV Neutrons

NUCLEAR REACTIONS, Fission ²³²Th, ²³⁸Pu(n, F), E=13.40-14.80 MeV; measured σ(E;θ(fragment)).

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset40111.

1971SH15      Yad.Fiz. 13, 950 (1971); Sov.J.Nucl.Phys. 13, 547 (1971)

D.L.Shpak, Y.B.Ostapenko, G.N.Smirenkin

Angular Anisotropy and Nucleon Pairing Effects in the Fission of Pu²³⁹ By Neutrons

NUCLEAR REACTIONS, Fission ²³⁹Pu(n, F), E=0.05-7.20 MeV; measured σ(E;θ(fragment)). ²⁴⁰Pu deduced transient states, fission barrier structure, superconducting phase transition.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset40124.

1969SH21      ZhETF Pisma v Redaktsiyu 10, 276 (1969); JETP Letters 10, 175 (1969)

D.L.Shpak, Y.B.Ostapenko, G.N.Smirenkin

Subbarrier Fission of Am²⁴¹ by Neutrons

NUCLEAR REACTIONS ²⁴¹Am(n, F), E=0.008-4 MeV; measured σ(E). ²⁴²Am deduced subbarrier fission structure.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset40010.