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NSR database version of May 2, 2024.

Search: Author = O.A.Rumyantsev

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2000MA86      Bull.Rus.Acad.Sci.Phys. 64, 409 (2000)

E.V.Mazepa, O.A.Rumyantsev, M.H.Urin

2νβb-Decay Rate of the ⁴⁸Ca Nucleus

RADIOACTIVITY ⁴⁸Ca(2β^-); calculated 2ν-accompanied 2β decay amplitude. Comparison with data.

1999GO34      Bull.Rus.Acad.Sci.Phys. 63, 703 (1999)

M.L.Gorelik, A.G.Zvenigorodsky, O.A.Rumyantsev, M.H.Urin

Partial Proton Widths of Isobaric Analog Resonances in Spherical Nuclei with Nucleon Pairing

NUCLEAR STRUCTURE ^{113,115,117,119,121,123,125}Sn, ^{125,127,129,131}Te; calculated proton widths and spectroscopic factors of isobaric analog resonances. Shell model plus random phase approximation calculations, comparison with experimental values.

1998MU34      Bull.Rus.Acad.Sci.Phys. 62, 1740 (1998)

S.E.Muraviev, O.A.Rumyantsev, M.G.Urin

On Decay Characteristics of Analogue and Gamow-Teller Resonances

1998RU08      Phys.Lett. 443B, 51 (1998)

O.A.Rumyantsev, M.H.Urin

The Strength of the Analog and Gamow-Teller Giant Resonances and Hindrance of the 2νββ-Decay Rate

RADIOACTIVITY ⁷⁶Ge, ⁸²Se, ⁹⁶Zr, ¹⁰⁰Mo, ¹¹⁶Cd, ^128,130Te, ¹³⁶Xe, ¹⁵⁰Nd(2β^-); ⁷⁸Kr, ⁹⁶Ru, ¹⁰⁶Cd, ¹²⁴Xe, ¹³⁰Ba, ¹³⁶Ce(2EC), (β⁺EC); calculated 2ν-accompanied decay T_1/2, Gamow-Teller matrix elements; deduced decay rate hindrance mechanism.

doi: 10.1016/S0370-2693(98)01291-X
Citations: PlumX Metrics

1996RU04      Yad.Fiz. 59, No 2, 223 (1996); Phys.Atomic Nuclei 59, 205 (1996)

O.A.Rumyantsev, M.G.Urin

Violation of SU(4) Symmetry in Nuclei and Rate of 2νββ Decay

NUCLEAR STRUCTURE ⁷⁶Ge, ⁸²Se, ⁹⁶Zr, ¹⁰⁰Mo, ¹¹⁶Cd, ^128,130Te, ¹³⁶Xe, ¹⁵⁰Nd; calculated 2ν-accompanied 2β-decay T_1/2, Gamow-Teller, analog states; deduced mean spin-orbit field role in SU(4) symmetry violation. Shell model.

1996RU21      Bull.Rus.Acad.Sci.Phys. 60, 1682 (1996)

O.A.Rumyantsev, M.G.Urin

Approximate Symmetries in Nuclei and the 2νββ Decay Rate

RADIOACTIVITY ⁸²Se, ⁹⁶Zr, ¹⁰⁰Mo, ¹¹⁶Cd, ¹³⁰Te, ¹²⁸Te, ¹³⁶Xe, ¹⁵⁰Nd, ⁷⁶Ge(2β); ⁷⁸Kr, ¹⁰⁶Cd, ⁹⁶Ru, ¹²⁴Xe, ¹³⁰Ba, ¹³⁶Ce(2EC), (EC), (β⁺), ¹²⁴Xe; calculated Gamow-Teller amplitude, T_1/2 for 2ν-accompanied two-β-decay. Approximation symmetries approach, comparison with experimental data.

1995RU18      Pisma Zh.Eksp.Teor.Fiz. 61, 356 (1995); JETP Lett. 61, 361 (1995)

O.A.Rumyantsev, M.G.Urin

Partial Conservation of Spin-Isospin SU(4) Symmetry in Nuclei in Connection with the Rate of 2νββ Decay

RADIOACTIVITY ⁴⁸Ca, ⁷⁶Ge, ⁸²Se, ⁹⁶Zr, ¹⁰⁰Mo, ¹¹⁶Cd, ^128,130Te, ¹³⁶Xe, ¹⁵⁰Nd(2β); calculated 2ν-accompanied 2β-decay T_1/2, decay amplitude. Partial SU(4)(στ) symmetry conservation.

1994RU02      Phys.Rev. C49, 537 (1994)

O.A.Rumyantsev, M.H.Urin

Continuum Random Phase Approximation Self-Consistent Approaches to the Theory of Isobaric Analog Resonances

NUCLEAR STRUCTURE ⁴⁹Ca, ⁹¹Zr, ¹³⁹Ba, ^208,209Pb; calculated IAR proton partial widths. Continuum RPA, exact, approximate approaches.

doi: 10.1103/PhysRevC.49.537
Citations: PlumX Metrics

1993RU02      Yad.Fiz. 56, No 2, 99 (1993); Phys.Atomic Nuclei 56, 203 (1993)

O.A.Rumyantsev, M.G.Urin

On Self-Consistent Approaches to the Theory of Isobaric Analog Resonances

NUCLEAR REACTIONS ⁴⁸Ca, ⁹⁰Zr, ¹³⁸Ba, ^208,207Pb(p, p), ≈ resonance; calculated IAR proton widths. Self-consistent approach.

1993RU07      Bull.Rus.Acad.Sci.Phys. 57, 797 (1993)

O.A.Rumyantsev, M.G.Urin

Violation of SU(4) Symmetry in Nuclei and the Rate of Double β-Decay of ⁴⁸Ca Nucleus

RADIOACTIVITY ⁴⁸Ca(2β); calculated 2ν-accompanied 2β-decay rate. Approximate conservation of SU(4) symmetry.

1993RU08      Bull.Rus.Acad.Sci.Phys. 57, 1656 (1993)

O.A.Rumyantsev, M.G.Urin, G.A.Chekomazov

Two-Stage Nucleon Decay of Charge-Exchange Giant Resonances

NUCLEAR STRUCTURE ^207,209Tl, ^120,118Sn, ⁹¹Y; calculated direct IAR neutron decay partial width. ²⁰⁸Pb, ^118,120Sn; calculated direct Gamow-Teller resonance neutron decay partial widths. Shell model, two-stage decay.

1992RU08      Bull.Rus.Acad.Sci.Phys. 56, 1734 (1992)

O.A.Rumyantsev, M.G.Urin

Self-Consistent Approaches to the IAR Theory

NUCLEAR STRUCTURE ⁴⁹Ca, ⁹¹Zr, ¹³⁹Ba, ^208,209Pb; calculated IAR proton decay width Γp. Various self-consistent approaches.

1991RU07      Izv.Akad.Nauk SSSR, Ser.Fiz. 55, 866 (1991); Bull.Acad.Sci.USSR, Phys.Ser. 55, No.5, 31 (1991)

O.A.Rumyantsev, M.G.Urin

Partial Cross Sections of (γp) Reaction with Excitation of the T(>) Component of E1 Giant Resonance

NUCLEAR REACTIONS, ICPND ⁴⁴Ca, ⁵⁸Ni, ⁹⁰Zr(γ, p), E ≤ 24 MeV; calculated σ(E). Generalized direct, semi-direct theory of nucleon capture.

1990GU34      Izv.Akad.Nauk SSSR, Ser.Fiz. 54, 891 (1990); Bull.Acad.Sci.USSR, Phys.Ser. 54, No.5, 75 (1990)

V.G.Guba, O.A.Rumyantsev, M.G.Urin

Partial Widths for the Direct Neutron Decay of Analog Resonances

NUCLEAR STRUCTURE ^209,207Tl, ^120,118Sn, ⁹¹Y; calculated IAR isospin forbidden neutron decay, Γn.

1987GU12      Phys.Lett. 192B, 17 (1987)

V.G.Guba, O.A.Rumyantsev, M.G.Urin

Partial E1-Radiation Widths of Isobaric Analog Resonances

NUCLEAR STRUCTURE ⁴⁹Sc, ⁸⁹Y, ¹⁴¹Pr, ²⁰⁷Pb, ²⁰⁹Bi, ¹³⁹La; calculated IAR dipole widths Γγ(E1), effective charges. Shell optical model.

doi: 10.1016/0370-2693(87)91133-6
Citations: PlumX Metrics

1984GU24      Izv.Akad.Nauk SSSR, Ser.Fiz. 48, 1986 (1984)

V.G.Guba, O.A.Rumyantsev, M.G.Urin

Partial E1-Radiation Widths of IAR

NUCLEAR STRUCTURE ⁴⁹Sc, ⁸⁹Y, ¹⁴¹Pr, ²⁰⁷Pb, ²⁰⁹Bi, ¹³⁹La; calculated IAR E1 transition Γγ.