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Article type: Cover
2005 Volume 112 Issue 2 Pages
Cover1-
Published: November 20, 2005
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Article type: Appendix
2005 Volume 112 Issue 2 Pages
App1-
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Article type: Appendix
2005 Volume 112 Issue 2 Pages
B1-B8
Published: November 20, 2005
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Teiji Kunihiro
Article type: Article
2005 Volume 112 Issue 2 Pages
B9-B10
Published: November 20, 2005
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S. Fujii, R. Okamoto, K. Suzuki
Article type: Article
2005 Volume 112 Issue 2 Pages
B11-B13
Published: November 20, 2005
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Recent results of the microscopic nuclear structure calculation within the framework of the unitary-model-operator approach are reported. Calculated ground-state and single-particle energies for nuclei around ^<16>O and ^<40>Ca using modern NN interactions are shown.
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S. X. Nakamura, H. Toki, K. Ikeda, S. Sugimoto
Article type: Article
2005 Volume 112 Issue 2 Pages
B14-B16
Published: November 20, 2005
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We propose a new type of effective interaction suitable for a model-space calculation of finite nuclei. Starting with a realistic NN-potential, we reduce its model-space with the use of a unitary transformation thereby obtaining the effective NN-potential. The unitary operator is chosen so that only the hardcore in the central force is eliminated; the tensor force is essentially invariant. We expect that the tensor force can be taken into account to a good extent by using a parity-mixed single-particle state in a model-space calculation.
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Thomas Papenbrock
Article type: Article
2005 Volume 112 Issue 2 Pages
B17-B19
Published: November 20, 2005
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Structure calculations of ground states and excited states of atomic nuclei usually involve very large configuration spaces, and it thus becomes important to determine the most relevant configurations. The density matrix renormalization group and the wave function factorization are two related approximation methods that significantly truncate the configuration space of the nuclear shell model while keeping a very small truncation error.
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T. Duguet, K. Bennaceur, P. Bonche
Article type: Article
2005 Volume 112 Issue 2 Pages
B20-B26
Published: November 20, 2005
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Several pairing schemes currently used to describe superfluid nuclei through Hartree-Fock-Bogolyubov (HFB) calculations are briefly reviewed. We put a particular emphasis on the regularization recipes used in connection with zero-range forces and on the density dependence which usually complement their definition. Regarding the chosen regularization process, the goal is not only to identify the impact it may or may not have on pairing properties of nuclei through spherical ID HFB calculations but also to assess its tractability for systematic axial 2D and 3D mean-field and beyond-mean-field calculations.
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E. Vigezzi, P. Avogadro, F. Barranco, R.A. Broglia, P.F. Bortignon, G. ...
Article type: Article
2005 Volume 112 Issue 2 Pages
B27-B31
Published: November 20, 2005
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N. Michel, W. Nazarewicz, M. Pioszajczak
Article type: Article
2005 Volume 112 Issue 2 Pages
B32-B34
Published: November 20, 2005
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Gamow states expansions have become a tool of choice to describe nuclei close to drip lines, as they properly incorporate continuum effects already on the level of single-particle basis. For example, resonant expansions have been used with RPA, HF, HF+BCS approaches and in the shell model within the traditional core/valence space framework. However, a resonant HFB theory still remains to be formulated, as well as a no-core shell model for nuclear resonant states. In this paper, we discuss the Gamow-Hartree-Fock-Bogoliubov (GHFB) problem with a positive chemical potential. It will be shown that a modification of both standard HF/HFB theories and underlying interactions is necessary to be able to perform calculations for unbound nuclei in GHFB and eventually Gamow QRPA (GQRPA).
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J. Dobaczewski, P.J. Borycki, W. Nazarewicz, M.V. Stoitsov
Article type: Article
2005 Volume 112 Issue 2 Pages
B35-
Published: November 20, 2005
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We show that due to the energy cutoff in the Hartree-Fock-Bogoliubov quasiparticle space, the Bogoliubov transformation becomes non-unitary. We propose a method of restoring the unitarity by introducing a truncated single-particle Hilbert space, in which the HFB equations are to be solved.
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Naoki Tajima
Article type: Article
2005 Volume 112 Issue 2 Pages
B36-B38
Published: November 20, 2005
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Advantages of a new method to obtain solutions of the Hartree-Fock-Bogoliubov (HFB) equation directory in the HFB canonical form are discussed in comparison with the ordinary method in which the solutions are expressed as the vacuum of Bogoliubov quasiparticles. A byproduct and necessary special cares are also described.
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J. Engel
Article type: Article
2005 Volume 112 Issue 2 Pages
B39-B43
Published: November 20, 2005
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A nonzero atomic electric-dipole moment (EDM) at a level not far from current experimental limits would signify time-reversal violation from outside the Standard Model. EDMs are enhanced in atoms that have octupole-deformed nuclei. I report calculations of the time-reversal-violating nuclear Schiff moment - the quantity that induces an atomic EDM - in the octupole-deformed nucleus ^<225>Ra as well as in ^<199>Hg, a symmetrically shaped isotope with the best current experimental limit on its atomic EDM. Although the two calculations are very different, both include important effects of core polarization and estimates of uncertainty. The results are encouraging for EDM experiments in the light actinides.
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H. Nakada
Article type: Article
2005 Volume 112 Issue 2 Pages
B44-B46
Published: November 20, 2005
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Algorithms for the self-consistent mean-field (Hartree-Fock-Bogoliubov as well as Hartree-Fock) calculations using the Gaussian expansion method have been developed. These algorithms are advantageous in giving appropriate asymptotics and in handling various interactions including finite-range ones. The methods are demonstrated by the calculations for oxygen isotopes and for N=16,32 nuclei.
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K. Mizuyama, M. Matsuo, Y. Serizawa
Article type: Article
2005 Volume 112 Issue 2 Pages
B47-B49
Published: November 20, 2005
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Takashi Nakatsukasa
Article type: Article
2005 Volume 112 Issue 2 Pages
B50-B53
Published: November 20, 2005
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Yoji Ohashi
Article type: Article
2005 Volume 112 Issue 2 Pages
B54-B58
Published: November 20, 2005
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Masayuki Matsuo
Article type: Article
2005 Volume 112 Issue 2 Pages
B59-B61
Published: November 20, 2005
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Janusz Skalski
Article type: Article
2005 Volume 112 Issue 2 Pages
B62-B66
Published: November 20, 2005
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We consider a variational search for instantons - imaginary-time mean fields, describing spontaneous fission, and generally quantum tunneling, within the mean-field theory. A formula for the decay exponent is given in terms of trial Hartree-Fock states. Exact for an instanton, it requires additional conditions to be imposed on trial paths to provide an upper bound for the instanton action.
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N. Hinohara
Article type: Article
2005 Volume 112 Issue 2 Pages
B67-B69
Published: November 20, 2005
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Using the multi-O(4) model as a simple model of oblate-prolate shape coexistence, we show that contribution from time-odd components of mean eld to mass parameter (inertia function) is very important for large amplitude collective motion.
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S. Shinohara, H. Ohta, K. Yabana, T. Nakatsukasa
Article type: Article
2005 Volume 112 Issue 2 Pages
B70-B72
Published: November 20, 2005
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We propose a new stochastic method to describe low-lying excited states of nite nuclei superposing multiple Slater determinants without assuming generator coordinates a priori. We examine accuracy of our method using the BKN interaction.
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Mitsuru TOHYAMA
Article type: Article
2005 Volume 112 Issue 2 Pages
B73-B75
Published: November 20, 2005
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M. Ito, K. Yabana
Article type: Article
2005 Volume 112 Issue 2 Pages
B76-
Published: November 20, 2005
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S. Ohkubo
Article type: Article
2005 Volume 112 Issue 2 Pages
B77-B78
Published: November 20, 2005
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N. W. Lwin, K. Hagino, N. Takigawa
Article type: Article
2005 Volume 112 Issue 2 Pages
B79-B81
Published: November 20, 2005
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In order to discuss a possibility of different deformation between proton and neutron in neutron-rich nuclei, we calculate the potential energy surface for carbon isotopes using the constrained relativistic mean field(RMF) method. For this purpose we introduce a double constrained both on proton and neutron quadrupole moments. We find a local minium where proton and neutron have different quadrupole moments.
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D. Abe, T. Matsuo, T. Otsuka
Article type: Article
2005 Volume 112 Issue 2 Pages
B82-
Published: November 20, 2005
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P.J. Borycki, J. Dobaczewski, W. Nazarewicz, M.V. Stoitsov
Article type: Article
2005 Volume 112 Issue 2 Pages
B83-B85
Published: November 20, 2005
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In this paper we investigate the stability of the regularization scheme with respect to the cut-off energy in greater detail for both spherical and deformed nuclei. Differences between the HFB results emerging from the pairing renormalization and pairing regularization procedures are analyzed.
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K. Hagino, H. Sagawa
Article type: Article
2005 Volume 112 Issue 2 Pages
B86-
Published: November 20, 2005
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T. Inakura
Article type: Article
2005 Volume 112 Issue 2 Pages
B87-
Published: November 20, 2005
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M. Ito, K. Yabana, K. Kato, K. Ikeda
Article type: Article
2005 Volume 112 Issue 2 Pages
B88-B90
Published: November 20, 2005
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Yoshiko Kanada-En'yo, Masaaki Kimura
Article type: Article
2005 Volume 112 Issue 2 Pages
B91-
Published: November 20, 2005
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Hirofumi Ohta, Takashi Nakatsukasa, Kazuhiro Yabana
Article type: Article
2005 Volume 112 Issue 2 Pages
B92-
Published: November 20, 2005
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Y. Serizawa, M. Matsuo
Article type: Article
2005 Volume 112 Issue 2 Pages
B93-
Published: November 20, 2005
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K. Zaizen, Y. Kiryu, Y. R. Shimizu
Article type: Article
2005 Volume 112 Issue 2 Pages
B94-
Published: November 20, 2005
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J. Terasaki, J. Engel
Article type: Article
2005 Volume 112 Issue 2 Pages
B95-
Published: November 20, 2005
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Masayuki Yamagami
Article type: Article
2005 Volume 112 Issue 2 Pages
B96-
Published: November 20, 2005
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New grid space representation for mean-field calculations, that is suitable for describing nuclei close to the neutron drip line, is proposed. By solving the deformed Hartree-Fock-Bogoliubov (HFB) equation in coordinate space, the applicability of the proposed method for halo nuclei is examined.
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Kenichi Yoshida
Article type: Article
2005 Volume 112 Issue 2 Pages
B97-
Published: November 20, 2005
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Satoshi Yoshida, Hiroyuki Sagawa
Article type: Article
2005 Volume 112 Issue 2 Pages
B98-
Published: November 20, 2005
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Article type: Appendix
2005 Volume 112 Issue 2 Pages
App2-
Published: November 20, 2005
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Article type: Appendix
2005 Volume 112 Issue 2 Pages
App3-
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Article type: Cover
2005 Volume 112 Issue 2 Pages
Cover2-
Published: November 20, 2005
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Article type: Cover
2005 Volume 112 Issue 2 Pages
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Published: November 20, 2005
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