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18 results on '"Shirikova, N. Yu."'

1. Coriolis mixing of the K = 1 and K = 0 mixed symmetry states in the well deformed even–even nuclei.

Author

Shirikova, N. Yu., Sushkov, A. V., and Jolos, R. V.

Subjects
*SYMMETRY, *PHONONS, *ISOTOPES
Abstract

The Coriolis matrix elements responsible for mixing of the 1 + K = 1 and 1 + K = 0 states are calculated in the framework of the Quasiparticle Phonon Model for several Gd and Dy isotopes. In many considered cases these matrix elements are equal to several tens of keV and are comparable with energy distances between the mixed levels. The results obtained indicates that Gd isotopes could be more suitable for finding deviations from Alaga rules in M1 transitions from 1 + state to the states of the ground band. [ABSTRACT FROM AUTHOR]

Published
2022
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2. 76-Osmium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 76 (Osmium). The isotopes Os-184, Os-186, Os-187, Os-188, Os-189, Os-190, Os-192 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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3. 75-Rhenium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 75 (Rhenium). The isotopes Re-183, Re-185, Re-187, Re-189 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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4. 74-Tungsten.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 74 (Tungsten). The isotopes W-180, W-181, W-182, W-183, W-184, W-186 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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5. 72-Hafnium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 72 (Hafnium). The isotopes Hf-173, Hf-174, Hf-175, Hf-176, Hf-177, Hf-178, Hf-179, Hf-180 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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6. 71-Lutetium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 71 (Lutetium). The isotopes Lu-171, Lu-173, Lu-175, Lu-176, Lu-177 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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7. 70-Ytterbium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 70 (Ytterbium). The isotopes Yb-166, Yb-167, Yb-168, Yb-169, Yb-170, Yb-171, Yb-172, Yb-173, Yb-174, Yb-175, Yb-176 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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8. 69-Thulium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 69 (Thulium). The isotopes Tm-165, Tm-167, Tm-169, Tm-171 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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9. 68-Erbium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 68 (Erbium). The isotopes Er-161, Er-162, Er-163, Er-164, Er-165, Er-166, Er-167, Er-168, Er-169, Er-170 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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10. 67-Holmium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 67 (Holmium). The isotopes Ho-161, Ho-163, Ho-165, Ho-166 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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11. 66-Dysprosium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 66 (Dysprosium). The isotopes Dy-154, Dy-156, Dy-158, Dy-159, Dy-160, Dy-161, Dy-162, Dy-163, Dy-164, Dy-165 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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12. 64-Gadolinium.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides the data for atomic nuclei with atomic number Z = 64 (Gadolinium). The isotopes Gd-146, Gd-148, Gd-151, Gd-152, Gd-153, Gd-154, Gd-155, Gd-156, Gd-157, Gd-158, Gd-159, Gd-160 are considered. [ABSTRACT FROM AUTHOR]

Published
2004
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13. Introduction for Chapter 6.

Author

Martienssen, W., Schopper, H., Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

This document is part of Subvolume C 'Z = 63 - 100' of Volume 18 'Energy and Structure of Nuclear Levels'. It provides a description of the structure of excited states in deformed nuclei with atomic number Z = 63 - 76. Level schemes and tables used in the represention of the data are explained. [ABSTRACT FROM AUTHOR]

Published
2004
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14. E0 transitional density for nuclei between spherical and deformed shapes.

Author

Shirikova, N. Yu., Jolos, R. V., Pietralla, N., Sushkov, A. V., and Voronov, V. V.

Subjects
*ANALYTIC geometry, *COORDINATES, *NUCLEAR physics, *EIGENFUNCTIONS, *NUMERICAL solutions to boundary value problems
Abstract

The Generator Coordinate Method (GCM) is used to construct the effective nuclear density operator suitable for calculations of E0 transitional densities with collective eigenfunctions of the phenomenological Bohr Hamiltonian. For example, the 0+ gs $ \rightarrow$ 0+ 2 transitional density is calculated for the shape-phase transitional nucleus 150Nd using the eigenfunctions of the approximate X(5) solution of the Bohr Hamiltonian. [ABSTRACT FROM AUTHOR]

Published
2009
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15. On neutron number dependence of B(E1;0+ 1 → 1- 1) reduced transition probability.

Author

Jolos, R. V., Shirikova, N. Yu., and Voronov, V. V.

Subjects
*ATOMIC transition probabilities, *QUASIPARTICLES, *PHONONS, *NUCLEAR shell theory, *XENON isotopes
Abstract

A neutron number dependence of the E1 0+ 1 → 1- 1 reduced transition probability in spherical even-even nuclei is analysed within the Q-phonon approach in the fermionic space to describe the structure of collective states. Microscopic calculations of the E1 0+ 1 → 1- 1 transition matrix elements are carried out for the Xe isotopes based on the RPA for the ground-state wave function. A satisfactory description of the experimental data is obtained. [ABSTRACT FROM AUTHOR]

Published
2006
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16. Gamma Deexcitation of the [sup 180m]Ta Isomer.

Author

Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Subjects
NUCLEAR isomers, TANTALUM isotopes
Abstract

Vibrational states built on the K[sup π] = 9[sup -] isomer and on the ground state (K[sup π] = 1[sup +]) in [sup 180]Ta are calculated within the quasiparticle-phonon nuclear model using the [sup 178]Hf nucleus as a core. A procedure for calculating the rates of K-allowed γ-ray transitions from vibrational states built on the isomer to those built on the ground state is presented. The probabilities of two-step processes consisting of a dipole excitation of the isomer and successive E1 and E2 transitions from them to vibrational states built on the ground state of the [sup 180]Ta nucleus are calculated. Two-step transitions from the isomer to vibrational states below 2.7 MeV and to the vibrational states built on the ground state appear to be very weak. There are many E1 transitions from the vibrational states built on the isomer to the vibrational states built on the ground state. They are weak and cannot be responsible for the strong deexcitation of [sup 180m]Ta in the relevant (γ,γ) reaction. A decisive role is played by collective E2 transitions from dipole excitations in several excitation energy intervals ranging between 2.7 and 4.0 MeV. These highly intense K-allowed two-step γ-ray transitions can be responsible for the strong deexcitation of the [sup 180m]Ta state in the (γ,γ') reactions. [ABSTRACT FROM AUTHOR]

Published
2001
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18. Dipole γ-ray transition rates in 238U.

Author

Soloviev, V. G., Sushkov, A. V., and Shirikova, N. Yu.

Abstract

M1 and E1 transition rates from the ground to excited states and between excited states in 238U are calculated within the quasiparticle-phonon nuclear model with the wave functions consisting of one- and two-phonon terms. We show that there are relatively large M1 transitions between 2+ states in the low-energy region. The fragmentation of the one-phonon states strongly affects M1 and E1 strength distributions. The correlation takes place between E1 and E3 transition strengths. We show that there are fast E1 and M1 transitions between large components of the wave functions differing by an octupole or quadrupole phonon. [ABSTRACT FROM AUTHOR]

Published
1997
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