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Search: Author = S.Kamerdzhiev

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2022KA54      Phys.Atomic Nuclei 85, 425 (2022)

S.P.Kamerdzhiev, M.I.Shitov

Characteristics of Pygmy and Giant Resonances within a Microscopic Model for Taking into Account Complex Configurations: Formalism

doi: 10.1134/S1063778822050052
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2022SH13      Phys.Atomic Nuclei 85, 42 (2022)

M.I.Shitov, D.A.Voitenkov, S.P.Kamerdzhiev, S.V.Tolokonnikov

Self-Consistent Calculations of Probabilities for Transitions between 3^-₁ and 2⁺₁ One-Phonon States in Tin Isotopes

NUCLEAR STRUCTURE ^{118,120,122,124}Sn; calculated probabilities for transitions between low-lying one-phonon states in nuclei where there is pairing, B(E1). Self-consistent approach based on the DF3-a Fayans energy density functional.

doi: 10.1134/S1063778822010124
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2021KA49      Phys.Atomic Nuclei 84, 649 (2021)

S.P.Kamerdzhiev, M.I.Shitov

Microscopic Model to Take into Account Complex Configurations for Pygmy and Giant Resonances

doi: 10.1134/S1063778821050082
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2020KA57      Eur.Phys.J. A 56, 265 (2020)

S.P.Kamerdzhiev, M.I.Shitov

Microscopic theory of pygmy- and giant resonances: accounting for complex 1p1h(X)phonon configurations

doi: 10.1140/epja/s10050-020-00224-7
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2018KA45      JETP Lett. 108, 155 (2018)

S.P.Kamerdzhiev, D.A.Voitenkov, E.E.Saperstein, S.V.Tolokonnikov

Self-Consistent Calculations of the Quadrupole Moments of the Lowest 3^- States in Sn and Pb Isotopes

NUCLEAR STRUCTURE ^{100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132}Sn, ^{190,192,194,196,198,200,202,204,206,208,210,212}Pb; calculated energies and B(E3). Comparison with available data.

doi: 10.1134/S0021364018150079
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2018LA07      Phys.Rev. C 97, 054329 (2018)

A.C.Larsen, J.E.Midtbo, M.Guttormsen, T.Renstrom, S.N.Liddick, A.Spyrou, S.Karampagia, B.A.Brown, O.Achakovskiy, S.Kamerdzhiev, D.L.Bleuel, A.Couture, L.Crespo Campo, B.P.Crider, A.C.Dombos, R.Lewis, S.Mosby, F.Naqvi, G.Perdikakis, C.J.Prokop, S.J.Quinn, S.Siem

Enhanced low-energy γ-decay strength of ⁷⁰Ni and its robustness within the shell model

RADIOACTIVITY ⁷⁰Co(β^-)[from ⁹Be(⁸⁶Kr, X), E=140 MeV/nucleon followed by fragment separation using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, summed γ energies, β^-γ-coin using double-sided silicon strip detector (DSSD) for electrons placed in the center of the Summing NaI (SuN) total absorption spectrometer for γ radiation. ⁷⁰Ni; deduced nuclear level density (NLD) and γ-strength function (γSF) using β-Oslo method. Comparison with previous experimental results, and with HFB+c calculations.

NUCLEAR STRUCTURE ⁷⁰Ni; calculated levels, J, π, B(E2), level densities, γSF, summed γSF, and M1 γ strengths for A=56-76 Ni isotopes. Quasiparticle time-blocking approximation and large-scale shell-model calculations with CA48MH1G and JUN45 interactions. Comparison with experimental results.

doi: 10.1103/PhysRevC.97.054329
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2017KA54      JETP Lett. 106, 139 (2017)

S.P.Kamerdzhiev, D.A.Voitenkov, E.E.Saperstein, S.V.Tolokonnikov, M.I.Shitov

Self-consistent description of EL transitions between one-phonon states in magic nuclei

NUCLEAR STRUCTURE ¹³²Sn, ²⁰⁸Pb; calculated energy levels, J, π, B(E2) using quantum theory of many-body systems.

doi: 10.1134/S0021364017150085
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2017SA24      J.Phys.(London) G44, 065104 (2017)

E.E.Saperstein, S.Kamerdzhiev, D.S.Krepish, S.V.Tolokonnikov, D.Voitenkov

The first self-consistent calculation of quadrupole moments of odd semi-magic nuclei accounting for phonon-induced corrections

NUCLEAR MOMENTS ^{111,113,115,117,119,121,123,125,127}In, ^{115,117,119,121,123}Sb; calculated quadrupole moments. Comparison with experimental data.

doi: 10.1088/1361-6471/aa65f5
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2016AC03      JETP Lett. 104, 374 (2016)

O.I.Achakovskiy, S.P.Kamerdzhiev, V.I.Tselyaev

Radiative strength function and the pygmy dipole resonance in ²⁰⁸Pb and ⁷⁰Ni

NUCLEAR REACTIONS ²⁰⁸Pb, ⁷⁰Ni(γ, X), (³He, ³He'), E<10 MeV; analyzed available data; ²⁰⁸Pb, ⁷⁰Ni. deduced the pygmy-resonance parameters and the E1 strength function.

doi: 10.1134/S0021364016180053
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2016KA64      Phys.Atomic Nuclei 79, 567 (2016)

S.P.Kamerdzhiev, O.I.Achakovskiy, A.V.Avdeenkov, S.Goriely

On microscopic theory of radiative nuclear reaction characteristics

NUCLEAR REACTIONS ⁷²Ni(γ, x), E=5-14 MeV; calculated photoabsorption σ. ^115,119Sn(n, γ)(n, γ), E=0.007-10 MeV;¹²¹Sn, ²⁰⁸Pb(n, γ), E=0.001-10 MeV; calculated σ. ⁶⁷Ni, ^117,119Sn(n, γ), E≈50, 560 keV; calculated γ multiplicity, σ(Εγ). Different approaches and data and some results taken from publications.

NUCLEAR STRUCTURE ^58,68,72Ni; calculated pygmy dipole resonance energy, fraction of EWSR. ¹³²Sn, ²⁰⁸Pb; calculated E1 photon strength function. ^{58,60,62,68,72}Ni;^{110,112,116,118,120,122,124,132,136}Sn, ²⁰⁸Pb; calculated γ radiative width Γ_γ for s-wave neutrons. Different approaches and data and some results taken from publications.

doi: 10.1134/S106377881604013X
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2015AC01      Phys.Rev. C 91, 034620 (2015)

O.Achakovskiy, A.Avdeenkov, S.Goriely, S.Kamerdzhiev, S.Krewald

Impact of phonon coupling on the photon strength function

NUCLEAR STRUCTURE ^{110,112,116,118,120,122,124,132,136}Sn, ^58,62,68,72Ni; calculated E1 strength function, average radiative width. QRPA, quasiparticle time blocking approximation. Comparison with experimental data.

NUCLEAR REACTIONS ^115,119Sn(n, γ), E=0.007-10 MeV; calculated σ(E).QRPA, Quasiparticle time blocking approximation. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.034620
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2014AC01      Eur.Phys.J. A 50, 6 (2014)

O.I.Achakovskiy, S.P.Kamerdzhiev, E.E.Saperstein, S.V.Tolokonnikov

Magnetic moments of odd-odd spherical nuclei

NUCLEAR STRUCTURE ^14,15,16N, ^15,17O, ^16,17,18,19F, ^38,39,40K, ^39,41Ca, ^40,42Sc, ^40,41,42Sc, ^{54,55,56,57,58,59,60,61}Co, ^{55,56,57,58,59,61}Ni, ^56,57,58Cu, ⁸⁷Kr, ^89,91Zr, ⁸⁹Y, ^87,90,91Nb, ^91,93Mo, ^93,94Tc, ⁹⁵Ru, ^{105,107,109,111,131,132}In, ^{107,111,113,115,123,125,127,132,133}Sn, ^{113,115,117,123,125,126,127,128,129,132,133,134}Sb, ^135,137Xe, ^136,137,138Cs, ^137,139Ba, ^138,139,140La, ^139,141Ce, ¹⁴³Nd, ^141,142Pr, ^143,145,147Sm, ^144,145,146Eu, ¹⁴⁷Gd, ^{191,193,195,197,199,201,203,205,206,208}Tl, ^{193,195,197,199,201,203,205,207,209,211}Pb, ^{201,202,203,204,205,206,207,208,209,210,211,212}Bi, ²¹¹Rn, ²¹³Ra, ^212,213Fr; calculated ground state and excited state μ. Compared with other calculations and available data. ⁵⁸Co, ^106,110In, ¹²⁴Sb, ^{194,196,198,200,202,204}Tl; calculated ground state μ obtained by mixing of two configurations. Compared to data. ^{55,56,57,59,60}Co, ^57,61Ni; calculated μ. Compared with published shell model calculations. Self-consistent TFFS (Theory of Finite Fermi Systems).

doi: 10.1140/epja/i2014-14006-1
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2014SA54      Phys.Atomic Nuclei 77, 1033 (2014)

E.E.Saperstein, O.I.Achakovskiy, S.P.Kamerdzhiev, S.Krewald, J.Speth, S.V.Tolokonnikov

Phonon coupling effects in magnetic moments of magic and semimagic nuclei

NUCLEAR STRUCTURE ^{188,190,192,194,196,198,200,202,204,206,207,208,209}Pb, ^{187,189,191,193,195,197,199,201,203,205,207}Tl, ²⁰⁹Bi, ^{100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134}Sn, ^{105,107,109,111,113,115,117,119,121,123,125,127}In, ^{115,117,119,121,123,125,127,129,131,133}Sb; calculated energy levels, J, π, magnetic moments, B(E2). Comparison with experimental data.

doi: 10.1134/S1063778814080122
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2013SA42      Europhys.Lett. 103, 42001 (2013)

E.E.Saperstein, S.Kamerdzhiev, S.Krewald, J.Speth, S.V.Tolokonnikov

A model for phonon coupling contributions to electromagnetic moments of odd spherical nuclei

NUCLEAR STRUCTURE ^{187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211}Tl, ^{99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131}In, ^{101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133}Sb; calculated magnetic moments. Theory of Finite Fermi Systems (TFFS), comparison with experimental data.

doi: 10.1209/0295-5075/103/42001
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2012TO07      Eur.Phys.J. A 48, 70 (2012)

S.V.Tolokonnikov, S.Kamerdzhiev, S.Krewald, E.E.Saperstein, D.Voitenkov

Quadrupole moments of spherical semi-magic nuclei within the self-consistent Theory of Finite Fermi Systems

NUCLEAR MOMENTS ^39,41Ca, ^85,87Kr, ^87,89Sr, ^89,91Zr, ^{101,103,105,107,109,111,113,115,117,119,121,123,125,127,129,131}Sn, ^135,137Xe, ^137,139Ba, ^141,143Nd, ^143,145Sm, ¹⁴⁷Gd, ^{197,199,201,205,211}Pb, ³⁹K, ⁴¹Sc, ⁸⁷Rb, ^{105,107,109,111,113,115,117,119,121,123,125,127}In, ^{115,119,121,123}Sb, ¹³⁷Cs, ¹³⁹La, ¹⁴¹Pr, ¹⁴⁵Eu, ²⁰⁵Tl, ^{203,205,207,209,213}Bi; calculated quadrupole moments using self-consistent Finite Fermi Systems with two different functionals. Compared with data.

doi: 10.1140/epja/i2012-12070-1
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2012VO03      Phys.Rev. C 85, 054319 (2012)

D.Voitenkov, S.Kamerdzhiev, S.Krewald, E.E.Saperstein, S.V.Tolokonnikov

Self-consistent calculations of quadrupole moments of the first 2⁺ states in Sn and Pb isotopes

NUCLEAR MOMENTS ^{100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134}Sn, ^{190,192,194,196,198,200,202,204,206,208}Pb; calculated static quadrupole moments of first 2+ states. Ground state correlations. Dependence of quadrupole moment on neutron access. Self-consistent calculations based on quasiparticle random-phase approximation (QRPA) and energy density functionals. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.054319
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2011AV04      Phys.Rev. C 83, 064316 (2011)

A.Avdeenkov, S.Goriely, S.Kamerdzhiev, S.Krewald

Self-consistent calculations of the strength function and radiative neutron capture cross section for stable and unstable tin isotopes

NUCLEAR STRUCTURE ^{100,110,112,114,120,124,132,136,142,150,156,166,176}Sn; calculated E1 strength functions, integral characteristics of GDR versus A, giant-dipole and pygmy-dipole resonances (GDR, PDR), neutron and proton transitional densities using self-consistent microscopic theory as well as standard quasiparticle random phase approximation (QRPA, QTBA). Comparison with experimental data. Discussed properties of GDR and PDR.

NUCLEAR REACTIONS ^123,131,149Sn(n, γ), E=0.001-10 MeV; calculated neutron capture cross sections obtained with E1 strength functions calculated within the QRPA, QTBA, and Kopecky-Uhl approaches.

doi: 10.1103/PhysRevC.83.064316
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2011AV09      J.Korean Phys.Soc. 59, 967s (2011)

A.Avdeenkov, S.Goriely, S.Kamerdzhiev

Impact of the Phonon Coupling on the Dipole Strength and Radiative Neutron Capture

NUCLEAR REACTIONS ^124,132,150Sn(γ, X), E=4-30 MeV;^123,131,149Sn(n, γ), E=1.E-3-10 MeV; calculated σ; deduced γ-ray strength functions. Self-consistent extended theory of finite Fermi systems (DTBA) with and without phonon coupling, TALYS code. Comparison with (Q)RPA and Kopecky-Uhl.

doi: 10.3938/jkps.59.967
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2011IS01      Phys.Rev. C 83, 034304 (2011)

J.Isaak, D.Savran, M.Fritzsche, D.Galaviz, T.Hartmann, S.Kamerdzhiev, J.H.Kelley, E.Kwan, N.Pietralla, C.Romig, G.Rusev, K.Sonnabend, A.P.Tonchev, W.Tornow, A.Zilges

Investigation of low-lying electric dipole strength in the semimagic nucleus ⁴⁴Ca

NUCLEAR REACTIONS ⁴⁴Ca(polarized γ, γ'), E = 6-10, 9.9 MeV; measured Eγ, Iγ, γ(θ), integrated cross sections, and polarization asymmetry at DHIPS facility using S-DALINAC accelerator, and at HIγS facility. ⁴⁴Ca; deduced levels, J, π, photon branching ratios, widths, B(E1) and B(M1) transition strengths. Comparisons with dipole strengths in ^40,48Ca and with microscopic calculations within the extended theory of finite Fermi systems. Dependence of total E1 strength on neutron number.

doi: 10.1103/PhysRevC.83.034304
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2011TO13      Phys.Rev. C 84, 064324 (2011)

S.V.Tolokonnikov, S.Kamerdzhiev, D.Voitenkov, S.Krewald, E.E.Saperstein

Effects of density dependence of the effective pairing interaction on the first 2⁺ excitations and quadrupole moments of odd nuclei

NUCLEAR STRUCTURE ^{182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214}Pb, ^{102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134}Sn; calculated level energies, B(E2) of first 2+ states, diagonal matrix elements of effective proton quadrupole field. ²⁰⁰Pb, ¹¹⁸Sn; calculated proton and neutron transition densities. ²⁰⁴Pb, ¹¹⁶Sn; calculated static proton and neutron effective fields. ^{105,107,109,111,113,115,117,119,121,123,125,127}In, ^{109,111,113,115,117,119,121}, ^123,125Sn, ^{115,117,119,121,123}Sb, ²⁰⁵Tl, ^{191,193,195,197,199,201,203,205,209}Pb, ^203,205,209Bi; calculated quadrupole moments. Self-consistent theory of finite Fermi systems based on energy density functionals. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.064324
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2010AV04      Phys.Atomic Nuclei 73, 1119 (2010)

A.V.Avdeenkov, S.Goriely, S.P.Kamerdzhiev

Impact of the phonon coupling on the radiative neutron capture

NUCLEAR REACTIONS ^123,149Sn(n, γ), E<10 MeV; ^124,150Sn(γ, X), E<28 MeV; calculated σ; deduced phonon contribution to pigmy-dipole resonance and radiative neutron capture σ. Extended theory of Finite fermi Systems (ETFFS).

doi: 10.1134/S1063778810070057
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2009AV04      Phys.Atomic Nuclei 72, 1332 (2009); Yad.Fiz. 72, 1385 (2009)

A.V.Avdeenkov, S.P.Kamerdzhiev

Pygmy dipole resonance in nuclei

NUCLEAR REACTIONS ¹²⁴Sn(α, αγ), E = 0-30 MeV; calculated photoabsorption σ, isoscalar and isovector strength functions, energies and B(E1) for pygmy and dipole resonances.

doi: 10.1134/S1063778809080080
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2009TS03      Phys.Rev. C 79, 034309 (2009)

V.Tselyaev, J.Speth, S.Krewald, E.Litvinova, S.Kamerdzhiev, N.Lyutorovich, A.Avdeenkov, F.Grummer

Description of the giant monopole resonance in the even-A ^112-124Sn isotopes within a microscopic model including quasiparticle-phonon coupling

NUCLEAR STRUCTURE ⁹⁰Zr, ^{110,112,114,116,118,120,122,124,132}Sn, ¹⁴⁴Sm, ²⁰⁸Pb; calculated strength distribution, mean energies and widths of isoscalar giant-monopole resonances (ISGMR) using two microscopic models: quasiparticle random phase approximation (QRPA) and quasiparticle time blocking approximation (QTBA) with self-consistence scheme based on Hartree-Fock+Bardeen-Cooper-Schrieffer (HF+BCS) approximation and Skyrme energy functional. Comparison with experimental data.

doi: 10.1103/PhysRevC.79.034309
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2008KA40      Eur.Phys.J. A 37, 333 (2008)

S.Kamerdzhiev, E.E.Saperstein

Interaction of the single-particle and collective degrees of freedom in non-magic nuclei: The role of phonon tadpole terms

doi: 10.1140/epja/i2008-10628-0
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2008LY03      Eur.Phys.J. A 37, 381 (2008)

N.Lyutorovich, J.Speth, A.Avdeenkov, F.Grummer, S.Kamerdzhiev, S.Krewald, V.I.Tselyaev

Self-consistent calculations within the Green's function method including particle-phonon coupling and the single-particle continuum

NUCLEAR STRUCTURE ¹³²Sn, ²⁰⁸Pb; calculated levels, J, π, B(E1), GDR, photoabsorption σ, isoscalar/isovector quadrupole strength distributions using a quasiparticle time blocking approximation. Comparison with RPA and data.

doi: 10.1140/epja/i2008-10638-x
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2007TE05      Phys.Lett. B 647, 104 (2007)

G.Tertychny, V.Tselyaev, S.Kamerdzhiev, F.Grummer, S.Krewald, J.Speth, A.Avdeenkov, E.Litvinova

Microscopic description of the low lying and high lying electric dipole strength in stable Ca isotopes

NUCLEAR STRUCTURE ^40,44,48Ca; calculated B(E1), electric dipole strength distribution, GDR. Extended theory of finite Fermi systems.

doi: 10.1016/j.physletb.2007.01.069
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2007TE08      Nucl.Phys. A788, 159c (2007)

G.Tertychny, V.Tselyaev, S.Kamerdzhiev, F.Grummer, S.Krewald, J.Speth, E.Litvinova, A.Avdeenkov

Pygmy dipole resonance in stable Ca isotopes

NUCLEAR STRUCTURE ^40,44,48Ca; calculated B(E1), electric dipole strength distribution, transition densities. Extended theory of finite Fermi systems using RPA. Comparison with data.

doi: 10.1016/j.nuclphysa.2007.01.077
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2006KA17      Phys.Atomic Nuclei 69, 418 (2006); Yad.Fiz. 69, 442 (2006)

S.P.Kamerdzhiev, S.F.Kovalev

Photonuclear Data and Modern Physics of Giant Resonances

NUCLEAR STRUCTURE ^40,44,48Ca, ⁵⁰Ti, ⁵²Cr, ⁵⁴Fe, ⁹⁰Zr, ^104,120,132Sn, ¹⁴⁰Ce, ^206,208Pb; calculated resonance properties, strength distributions, photoabsorption σ.

doi: 10.1134/S1063778806030057
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2006KA34      Phys.Atomic Nuclei 69, 1110 (2006)

S.P.Kamerdzhiev

Extended Theory of Finite Fermi Systems for Magic and Nonmagic Nuclei

NUCLEAR REACTIONS ²⁰⁸Pb(e, e'), E=50 MeV; ²⁰⁸Pb(p, p'), E=200 MeV; analyzed particle spectra, isoscalar E2 strength function. ⁴⁰Ca(α, α'), E=240 MeV; calculated Eα, σ(θ=1.08°). Extended theory of finite Fermi systems, comparisons with data.

NUCLEAR STRUCTURE ^40,44,48Ca, ^104,120,132Sn; calculated pygmy resonance energies. RPA, extended theory of finite Fermi systems, comparisons with data.

doi: 10.1134/S1063778806070039
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2004HA51      Phys.Rev.Lett. 93, 192501 (2004)

T.Hartmann, M.Babilon, S.Kamerdzhiev, E.Litvinova, D.Savran, S.Volz, A.Zilges

Microscopic Nature of the Pygmy Dipole Resonance: The Stable Ca Isotopes

NUCLEAR REACTIONS ⁴⁴Ca(γ, γ'), E=9.9 MeV bremsstrahlung; measured Eγ, Iγ. ⁴⁴Ca deduced electric dipole strength distribution, pygmy dipole resonance features.

NUCLEAR STRUCTURE ^40,44,48Ca; analyzed B(E1), summed strength; deduced quasiparticle-phonon coupling contributions to pygmy dipole resonance. Microscopic model.

doi: 10.1103/PhysRevLett.93.192501
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2004KA06      Yad.Fiz. 67, 180 (2004); Phys.Atomic Nuclei 67, 183 (2004); Erratum Yad.Fiz. 67, 1632 (2004); Phys.Atomic Nuclei 67, 1610 (2004)

S.P.Kamerdzhiev, E.V.Litvinova

Green's Function Method in the Problem of Complex Configurations in Fermi Systems with pairing

NUCLEAR STRUCTURE ^104,120,132Sn; calculated dipole photoabsorption σ, isovector dipole resonance energies, widths; deduced pairing contributions. Green's function method.

doi: 10.1134/1.1644022
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2004KA11      Phys.Rep. 393, 1 (2004)

S.Kamerdzhiev, J.Speth, G.Tertychny

Extended theory of finite Fermi systems: collective vibrations in closed shell nuclei

doi: 10.1016/j.physrep.2003.11.001
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2003LI11      Yad.Fiz. 66, 584 (2003); Phys.Atomic Nuclei 66, 558 (2003)

E.V.Litvinova, S.P.Kamerdzhiev, V.I.Tselyaev

Temperature Generalization of the Quasiparticle Random-Phase Approximation with Allowance for a Continuum

NUCLEAR STRUCTURE ^104,120Sn; calculated dipole photoabsorption σ vs excitation energy, resonance features. Continuum quasiparticle RPA.

doi: 10.1134/1.1563722
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2002KA57      Phys.Rev. C66, 044304 (2002)

S.P.Kamerdzhiev, V.I.Tselyaev

Excitations of the unstable nuclei ⁴⁸Ni and ⁴⁹Ni

NUCLEAR STRUCTURE ^48,49Ni, ⁴⁸Ca, ⁴⁹Sc; calculated strength functions, resonance features. Continuum RPA and odd RPA.

doi: 10.1103/PhysRevC.66.044304
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2001KA06      Phys.Rev. C63, 034304 (2001)

S.P.Kamerdzhiev, R.J.Liotta, V.I.Tselyaev

Random Phase Approximation for Odd Nuclei and Its Application to the Description of the Electric Dipole Modes in ¹⁷O

NUCLEAR STRUCTURE ^16,17O; calculated E1 resonance photoabsorption σ. Generalization of RPA for odd nuclei.

doi: 10.1103/PhysRevC.63.034304
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2001KA33      Yad.Fiz. 64, No 4, 686 (2001); Phys.Atomic Nuclei 64, 627 (2001)

S.P.Kamerdzhiev, E.V.Litvinova

Some Problems in the Generalized Theory of Finite Fermi Systems

doi: 10.1134/1.1368221
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2001KA62      Eur.Phys.J. A 12, 285 (2001)

S.Kamerdzhiev, E.Litvinova, D.Zawischa

Quasiparticle-Phonon Interaction in Non-Magic Nuclei

doi: 10.1007/s100500170006
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2000KA22      Eur.Phys.J. A 7, 483 (2000)

S.Kamerdzhiev, J.Speth, G.Tertychny

Microscopic Analysis of the Breathing Mode in ⁴⁰Ca and ⁵⁸Ni

NUCLEAR REACTIONS ⁴⁰Ca, ⁵⁸Ni(α, α'), E=240 MeV; analyzed isoscalar monopole resonance transition densities. Microscopic model.

doi: 10.1007/s100500050421
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1999AV02      Yad.Fiz. 62, No 4, 610 (1999); Phys.Atomic Nuclei 62, 563 (1999)

A.V.Avdeenkov, S.P.Kamerdzhiev

Description of Excitations in Odd Nonmagic Nuclei by Green's Function Method

NUCLEAR STRUCTURE ^119,121Sn; calculated single-particle strength distributions, neutron states spectrocopic factors. Single-particle Green's function method.

1999AV03      Pisma Zh.Eksp.Teor.Fiz. 69, 669 (1999); JETP Lett. 69, 715 (1999)

A.V.Avdeenkov, S.P.Kamerdzhiev

On the Mechanisms of Superfluidity in Atomic Nuclei

doi: 10.1134/1.568080
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1999AV05      Phys.Lett. 459B, 423 (1999)

A.V.Avdeenkov, S.P.Kamerdzhiev

The Role of Ground State Correlations in the Single-Particle Strength of Odd Nuclei with Pairing

NUCLEAR STRUCTURE ^119,121Sn; calculated single-particle levels, spectroscopic factors; deduced role of ground-state correlations, quasiparticle-phonon interactions. Comparisons with data.

doi: 10.1016/S0370-2693(99)00719-4
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1998KA29      Phys.Rev. C58, 172 (1998)

S.Kamerdzhiev, R.J.Liotta, E.Litvinova, V.Tselyaev

Continuum Quasiparticle Random-Phase Approximation Description of Isovector E1 Giant Resonances

NUCLEAR STRUCTURE ^{100,104,120,132}Sn; calculated E1 photoabsorption σ; deduced continuum effect on giant resonances. Continuum RPA, forced consistency procedure.

doi: 10.1103/PhysRevC.58.172
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1998KA44      Acta Phys.Pol. B29, 2231 (1998)

S.Kamerdzhiev, J.Speth, G.Tertychny

Effects of the Quasiparticle-Phonon Interaction in Magic and Non-Magic Nuclei

NUCLEAR REACTIONS ⁴⁰Ca, ⁵⁸Ni(α, α'), E=240 MeV; analyzed E0 resonance strength distributions; deduced quasiparticle-phonon interaction role.

1998TS15      Bull.Rus.Acad.Sci.Phys. 62, 880 (1998)

V.I.Tselyaev, S.P.Kamerdzhiev, R.Liotta, E.V.Litvinova

Calculation of E1 Resonance by the ' QRPA + Continuum ' Model

NUCLEAR STRUCTURE ^104,120Sn; calculated isovector E1 resonance strength distribution; deduced role of single-particle continuum. QRPA plus continuum model.

1997AV07      Bull.Rus.Acad.Sci.Phys. 61, 1656 (1997)

A.V.Avdeenkov, S.P.Kamerdzhiev

Effect of Quasiparticle-Phonon Interaction on Single-Particle Filling Numbers for Nonmagic Nuclei

NUCLEAR STRUCTURE ⁸⁶Kr, ¹²⁰Sn, ²⁰⁸Pb; calculated single-particle occupancies; deduced quasiparticle-phonon interaction contribution. Green's function method.

1997KA17      Phys.Rev. C55, 2101 (1997)

S.Kamerdzhiev, J.Lisantti, P.von Neumann-Cosel, A.Richter, G.Tertychny, J.Wambach

Fine Structure of the Giant Isoscalar Quadrupole Resonance in ²⁰⁸Pb Observed in High-Resolution (e, e') and (p, p') Experiments

NUCLEAR REACTIONS ²⁰⁸Pb(p, p'), E=200 MeV; measured proton spectra. ²⁰⁸Pb(e, e'), E=50 MeV; analyzed electron spectra. ²⁰⁸Pb deduced giant isoscalar quadrupole resonance fine structure. RPA modes coupled to surface vibration.

doi: 10.1103/PhysRevC.55.2101
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1997KA20      Yad.Fiz. 60, No 3, 572 (1997); Phys.Atomic Nuclei 60, 497 (1997)

S.P.Kamerdzhiev

Equations for Single-Particle Green's Functions in Nonmagic Nuclei

1997KA50      Bull.Rus.Acad.Sci.Phys. 61, 122 (1997)

S.P.Kamerdzhiev

Microscopic Theory of Giant Resonances (A Review)

NUCLEAR STRUCTURE ^40,48Ca, ²⁰⁸Pb, ^100,132Sn, ^56,78Ni, ¹⁶O; compiled, reviewed giant multipole resonance calculations; deduced models improvement related features.

1997KA57      Nucl.Phys. A624, 328 (1997)

S.Kamerdzhiev, J.Speth, G.Tertychny

Microscopic Description of the E0, E2 and E1 Giant Resonances in ⁴⁰Ca, ⁴⁸Ca and ⁵⁶Ni

NUCLEAR STRUCTURE ^40,48Ca, ⁵⁶Ni; calculated E0, E1, E2 giant resonances, strength functions, E1 transition densities; deduced ground-state correlations role. Continuum RPA, particle-hole-phonon coupling.

doi: 10.1016/S0375-9474(97)00315-1
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1997KA80      Fiz.Elem.Chastits At.Yadra 28, 333 (1997); Phys.Part.Nucl. 28, 134 (1997)

S.P.Kamerdzhiev, G.Ya.Tertychnyi, V.I.Tselyaev

The Method of Time-Ordered Graph Decoupling and Its Application to the Description of Giant Resonances in Magic Nuclei

NUCLEAR STRUCTURE ^40,48Ca, ⁵⁶Ni, ²⁰⁸Pb; calculated giant resonance E, Γ, photoabsorption σ. Time-ordered graph decoupling method.

1996AV07      Bull.Rus.Acad.Sci.Phys. 60, 1716 (1996)

A.V.Avdeenkov, S.P.Kamerdzhiev

On Application of the Optical Potential Theory to Calculation of Nucleon-Nucleus Cross Sections

NUCLEAR REACTIONS ¹²⁰Sn, ²⁰⁸Pb(n, γ)E=0-4 MeV; calculated optical potentials, s-wave absorption σ. Green function potential, particle+phonon states.

1996KA09      Nucl.Phys. A599, 373c (1996)

S.Kamerdzhiev, J.Speth

Distribution of Giant Resonance Strength in Stable and Unstable Nuclei

NUCLEAR REACTIONS ²⁰⁸Pb(γ, X), E ≤ 40 MeV; compiled, reviewed calculations of giant resonance photoabsorption σ(E). ²⁰⁸Pb(γ, n), E ≤ 22 MeV; calculated σ(E). Microscopic theory.

NUCLEAR STRUCTURE ^48,40Ca, ^56,78Ni, ^100,132Sn, ²⁰⁸Pb; compiled, reviewed calculations of B(M1).

doi: 10.1016/0375-9474(96)00080-2
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1996KA53      Bull.Rus.Acad.Sci.Phys. 60, 702 (1996)

S.P.Kamerdzhiev, E.V.Litvinova

Simple Model of Dynamic Correlation Effects in a Nuclear Ground State

NUCLEAR STRUCTURE ⁴⁰Ca, ¹⁶O; calculated levels, B(λ). Microscopic two-level model, ground state correlation effects.

1995KA35      Phys.Rev.Lett. 74, 3943 (1995)

S.Kamerdzhiev, J.Speth, G.Tertychny

Splitting of the Isoscalar E2 Giant Resonance and Evidence of Low-Lying E0 Strength in ⁴⁰Ca

NUCLEAR STRUCTURE ⁴⁰Ca; calculated E2, E0 giant resonances EWSR depletion, E2 transition strength function.

doi: 10.1103/PhysRevLett.74.3943
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1994KA04      Phys.Lett. 321B, 6 (1994)

S.Kamerdzhiev, O.Rosso, G.Tertychnyi, W.Unkelbach

On the Nature of Low-Lying 1⁺ Levels in Spherical Open-Shell Nuclei

NUCLEAR STRUCTURE ⁹⁶Zr; calculated levels, B(λ); deduced ground state correlations role. RPA, quasipaticle RPA, 1p1h coupling to phonon ground state correlations.

doi: 10.1016/0370-2693(94)90319-0
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1994KA10      Nucl.Phys. A569, 313c (1994)

S.Kamerdzhiev, G.Tertychnyi, J.Speth

Theoretical Description of Giant Resonances in Stable and Unstable Magic Nuclei

NUCLEAR REACTIONS ²⁰⁸Pb(γ, X), E ≤ 35 MeV; calculated photoabsorption σ(E). Microscopic approach, Green function method, RPA with complex configuration.

NUCLEAR STRUCTURE ⁴⁰Ca, ^56,78Ni, ^100,132Sn, ²⁰⁸Pb; calculated diverse giant resonance excitation functions, B(λ). Microscopic approach, Green function method, RPA with complex configuration.

doi: 10.1016/0375-9474(94)90122-8
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1994KA28      Nucl.Phys. A577, 641 (1994)

S.Kamerdzhiev, G.Tertychny, J.Speth, J.Wambach

The Role of 1p1h (x) Phonon Ground-State Correlations in the Isoscalar E0 Excitations of Magic Nuclei

NUCLEAR STRUCTURE ^40,48Ca, ²⁰⁸Pb, ⁵⁶Ni; calculated isoscalar E0 transition strength functions. Extended RPA, continuum effects.

doi: 10.1016/0375-9474(94)90937-7
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1993KA11      Nucl.Phys. A555, 90 (1993)

S.Kamerdzhiev, J.Speth, G.Tertychnyi, V.Tselyaev

Microscopic Description of the Giant Electric-Dipole Resonance in Magic Nuclei

NUCLEAR REACTIONS ^40,48Ca(γ, X), E=10-32 MeV; ²⁰⁸Pb(γ, X), E ≈ 6-20 MeV; calculated photoabsorption σ(E). ^40,48Ca, ²⁰⁸Pb deduced E1 resonances integral characteristics, giant resonances. Extended RPA approach.

doi: 10.1016/0375-9474(93)90315-O
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1993KA25      Z.Phys. A346, 253 (1993)

S.Kamerdzhiev, J.Speth, G.Tertychnyi, J.Wambach

M1 Resonances in Unstable Magic Nuclei

NUCLEAR STRUCTURE ⁴⁸Ca, ²⁰⁸Pb, ^56,78Ni, ^100,132Sn; calculated M1 transition strength distributions, B(M1). Microscopic approach, RPA configurations, single particle continuum.

doi: 10.1007/BF01292513
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1992KA04      Phys.Lett. 275B, 1 (1992)

S.Kamerdzhiev, D.Zawischa

Calculation of the Giant Dipole Resonance in Hot Nonspherical Heavy Nuclei with Realistic Forces

NUCLEAR STRUCTURE ¹⁶⁰Er; calculated B(E1) strength spectral distribution at different temperatures. Hot nuclei, quasiparticle RPA.

doi: 10.1016/0370-2693(92)90841-Q
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1992KA30      Phys.Lett. 287B, 293 (1992)

S.Kamerdzhiev, G.Tertychnyi, W.Unkelbach

Giant Dipole Resonance in ²⁰⁸Pb within the Approach Including 1p1h (x) Phonon Configurations and Continuum

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated E1 giant resonances, Γ, photoabsorption σ(E). RPA, 1p1h plus phonon configurations, continuum.

NUCLEAR REACTIONS ²⁰⁸Pb(γ, X), E=6-20 MeV; calculated giant resonances, E1 photoabsorption σ(E). RPA, 1p1h plus phonon configurations, continuum.

doi: 10.1016/0370-2693(92)90985-D
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1991KA26      Phys.Lett. 267B, 12 (1991)

S.P.Kamerdzhiev, G.Ya.Tertychnyi, V.I.Tselyaev

Calculations of E₁ Resonances in ⁴⁰Ca, ⁴⁸Ca and ²⁰⁸Pb Including 1p1h(x) Phonon Configurations

NUCLEAR STRUCTURE ^40,48Ca, ²⁰⁸Pb; calculated E1 resonances, Γ, sum rule strength. Microscopic model, (1px1h)+phonon configuration.

NUCLEAR REACTIONS ^40,48Ca(γ, X), E=8-32 MeV; ²⁰⁸Pb(γ, X), E ≈ 6-20 MeV; calculated absorption σ(E). Microscopic model, (1px1h)+phonon configuration.

doi: 10.1016/0370-2693(91)90515-R
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1991KA30      Pisma Zh.Eksp.Teor.Fiz. 53, 393 (1991); JETP Lett.(USSR) 53, 412 (1991)

S.P.Kamerdzhiev, G.Ya.Tertychnyi

Calculations of the E1 Resonance in ⁴⁸Ca in the 1P1H + 2P2H + Continuum Approximation

NUCLEAR REACTIONS ⁴⁸Ca(γ, X), E ≈ 12-26 MeV; calculated double photoabsorption σ(E). ⁴⁸Ca deduced E1 resonance, Γ. Finite Fermi system theory, RPA.

1991KA42      Izv.Akad.Nauk SSSR, Ser.Fiz. 55, 49 (1991); Bull.Acad.Sci.USSR, Phys.Ser. 55, No.1, 45 (1991)

S.P.Kamerdzhiev, V.I.Tselyaev

Effects from Ground-State 2p2h Correlation on the M1 Resonance in ²⁰⁸Pb

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated B(λ), isovector M1 resonance spreading width; deduced 2p-2h ground state correlation role. Microscopic model, 1p-1h coupling to phonon included.

1989KA28      Z.Phys. A334, 19 (1989)

S.P.Kamerdzhiev, V.N.Tkachev

A Microscopic Model Taking into Account 2p2h Configurations in Magic Nuclei. Calculations of M1 Excitations

NUCLEAR STRUCTURE ¹⁶O, ^40,42,44,48Ca, ⁵⁴Fe, ⁹⁰Zr, ²⁰⁸Pb; calculated B(λ). Green's function formalism, 2p-2h configurations, microscopic model.

1988KA36      Izv.Akad.Nauk SSSR, Ser.Fiz. 52, 874 (1988); Bull.Acad.Sci.USSR, Phys.Ser. 52, No.5, 38 (1988)

S.P.Kamerdzhiev, V.N.Tkachev

Calculating M1 Excitations in ⁴²Ca, ⁴⁴Ca, and ⁵⁴Fe Incorporating 1p1h (x) Phonon Configurations

NUCLEAR STRUCTURE ^42,44Ca, ⁵⁴Fe; calculated levels, B(λ). Phonon coupled to 1p-1h.

1986KA29      Yad.Fiz. 43, 1426 (1986)

S.P.Kamerdzhiev, V.N.Tkachev

Analysis of the Microscopic Model of taking 2p2h Configurations into Account

NUCLEAR STRUCTURE ⁴⁸Ca, ⁹⁰Zr, ²⁰⁸Pb; calculated levels, B(M1). Microscopic model.

1986KA48      Yad.Fiz. 44, 606 (1986)

S.P.Kamerdzhiev, V.I.Tselyaev

Single-Particle Characteristics in Problem taking Account of Complex Configurations

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated neutron energy levels. Single particle motion, quasiparticle-phonon interaction.

1985TK01      Yad.Fiz. 42, 832 (1985)

V.N.Tkachev, S.P.Kamerdzhiev

The ' 1p1h + Phonon ' Configuration Effect on M1 Excitations in Magic Nuclei

NUCLEAR STRUCTURE ^40,48Ca, ²⁰⁸Pb, ⁹⁰Zr; calculated levels, B(λ). Microscopic model.

1984KA08      Izv.Akad.Nauk SSSR, Ser.Fiz. 48, 97 (1984); Bull.Acad.Sci.USSR, Phys.Ser. 48, No.1, 95 (1984)

S.P.Kamerdzhiev, V.N.Tkachev

Calculation of M1-Resonance Characteristics in ²⁰⁸Pb and Estimate of 1p1h + 3₁^--Phonon Configurations

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated B(M1) distribution. Finite Fermi system, diagrammatic approach.

1984KA18      Phys.Lett. 142B, 225 (1984)

S.P.Kamerdzhiev, V.N.Tkachev

M1 Resonance Calculations in Magic Nuclei taking into Account 1p1h + Phonon Configurations

NUCLEAR STRUCTURE ^40,48Ca, ²⁰⁸Pb, ⁹⁰Zr; calculated M1 resonance characteristics, strength distribution, B(M1). Microscopic model, Green's function technique.

doi: 10.1016/0370-2693(84)91186-9
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1984KA39      Pisma Zh.Eksp.Teor.Fiz. 40, 31 (1984); JETP Lett.(USSR) 40, 756 (1984)

S.P.Kamerdzhiev, V.N.Tkachev

Calculated Properties of M1 Excitations in ⁴⁰Ca and ⁴⁸Ca

NUCLEAR STRUCTURE ^40,48Ca; calculated levels, B(M1) strength distribution. Microscopic model.

1977KA20      Acta Phys.Pol. B8, 415 (1977)

S.P.Kamerdzhiev, I.N.Borzov, V.N.Tkachev

M1 Resonance and Comparative Study of E1, E2 and M1 Resonances in Near-Threshold Region

NUCLEAR STRUCTURE ⁸⁸Sr, ⁹⁰Zr, ^{114,116,120,124,126}Sn, ¹⁴⁰Ce, ^202,204,208Pb; calculated M1 resonance characteristics.

NUCLEAR REACTIONS ⁹⁰Zr, ²⁰⁸Pb, ¹²⁰Sn(γ, γ); calculated E1, E2, M1 resonance contributions to absorption σ.

1976TK01      Yad.Fiz. 24, 715 (1976); Sov.J.Nucl.Phys. 24, 373 (1976)

V.N.Tkachev, I.N.Borzov, S.P.Kamerdzhiev

M1 Transitions in Spherical Nuclei

NUCLEAR STRUCTURE ⁸⁸Sr, ⁹⁰Zr, ¹⁴⁰Ce, ^{114,116,120,124,126}Sn, ¹⁴⁰Ce, ^202,204,208Pb; calculated M1 resonances, γ absorption σ, B(λ). ^207,209Pb, ²⁰⁹Bi, ²⁰⁷Tl; calculated μ, B(M1).

1975BO10      Yad.Fiz. 21, 31 (1975); Sov.J.Nucl.Phys. 21, 15 (1975)

I.N.Borzov, S.P.Kamerdzhiev

Electric Quadrupole Transitions in ⁸⁸Sr and ⁹⁰Zr

NUCLEAR STRUCTURE ⁸⁸Sr, ⁹⁰Zr; calculated levels, B(E2).

1973KA36      Phys.Lett. 47B, 147 (1973)

S.P.Kamerdzhiev

Electric Quadrupole Transitions in ¹²⁰Sn and ²⁰⁸Pb

NUCLEAR STRUCTURE ¹²⁰Sn, ²⁰⁸Pb; calculated levels, B(E2).

doi: 10.1016/0370-2693(73)90592-3
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1972KA32      Yad.Fiz. 15, 676 (1972); Sov.J.Nucl.Phys. 15, 379 (1972)

S.P.Kamerdzhiev

E1 and E2 Transitions in Medium and Heavy Spherical Nuclei

NUCLEAR STRUCTURE ^112,120,124Sn, ²⁰⁸Pb; calculated levels, B(E2); analyzed giant resonance structure.

1971KA37      Yad.Fiz. 13, 1335 (1971); Sov.J.Nucl.Phys. 13, 767 (1971)

S.P.Kamerdzhiev, L.V.Manakhov

Low-Lying 2⁺ Levels of Pb²⁰⁸

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated low-lying levels, B(E2).

1970KA24      Yad.Fiz. 11, 537 (1970); Sov.J.Nucl.Phys. 301 (1970)

S.V.Kamerdzhiev

Low-Lying 'Single-Phonon' 0⁺ Levels in Spherical Nuclei

NUCLEAR STRUCTURE ^118,120Sn, ¹⁴⁰Ce, ¹⁴²Nd, ^202,204Pb; calculated single-phonon o+ levels, B(E0).

1969KA30      Yadern.Fiz. 9, 324 (1969); Soviet J.Nucl.Phys. 9, 190 (1969)

S.P.Kamerdzhiev

Collective Oscillations of Nuclei in the Theory of Finite Fermi Systems

NUCLEAR STRUCTURE ¹²⁴Sn, ²⁰⁴Pb; calculated effective monopole, quadrupole charges.

1967KA21      Yadern.Fiz. 5, 971 (1967); Soviet J.Nucl.Phys. 5, 693 (1967)

S.P.Kamerdzhiev

E2 transition and Effective Quadrupole Charge in Odd Near-Magic Nuclei

Note: The following list of authors and aliases matches the search parameter S.Kamerdzhiev: , S.P.KAMERDZHIEV, S.V.KAMERDZHIEV