119772144
Microscopic study of the ground state properties of light nuclei
Ground state properties of light isotopes from helium to oxygen, such as binding energies, spin parities, rms radii, and halo phenomena are studied systematically by the Skyrme Hartree-Fock model with fit E{sub {sigma} } as the effective interaction. Since the particle number of the studied system is rather small, pairing interactions between identical nucleons are treated with the particle number conservation method. The results of the calculation show that most of the ground state properties can be well described. Some unsuccessful points of the calculation are pointed out. {copyright} {ital 1997} {ital The American Physical Society}
45513005
Cranking Bohr-Mottelson Hamiltonian applied to normal bands of odd-A nuclei.
Normal bands on the well-deformed odd-{ital A} nuclei are studied with the cranking Bohr-Mottelson Hamiltonian proposed by us. The condition of validity of the model and comparison with the Harris expansion are discussed. The phenomena of identical bands are briefly discussed with the help of the present model.
45685096
Cranking Bohr-Mottelson Hamiltonian applied to superdeformed bands in the A~150 region.
7274660
Cranking Bohr-Mottelson Hamiltonian applied to superdeformed bands in A~190 region.
Level spins and transition energies of 26 superdeformed bands in the A approximately 190 region are studied with the rotational spectral formula derived from the cranking Bohr-Mottelson Hamiltonian proposed by us with satisfactory results.
41310832
Coupling between rotational and vibrational motions with the cranking Bohr-Mottelson Hamiltonian.
A cranking Bohr-Mottelson Hamiltonian is proposed and a formula for the rotational spectrum is derived, showing explicitly the coupling between rotational and vibrational motions. The formula is applied to the rotational bands of even-even nuclei in the rare-earth and actinide regions. The ground-state rotational band (below backbending) and the associated [beta] and [gamma] bands can be represented by a single formula. Nuclear structure information on the parameters is discussed.
120698180
Identification of IRAS sources in the outer disk of the galaxy
14520300
Distance Determination of Variable Galactic Sources
We have developed a timing analysis method to determine the distances of variable galactic X-ray sources based on the method advanced by Trumper and Schonfelder in 1973. The light-curve of the halo produced by the scattering of X-rays off the interstellar dust is delayed and smeared by the dust grains. This method utilizes the differences between the power density spectra of the point source and the halo. We present the details of this method and our first applications of this method to the Chandra data of X-ray binary Cyg X-3.
119402342
ROSAC: Studying the clustering properties of X-ray selected AGNs
We present the first ROSAC results of an AGN clustering analysis. This study comprises a sample of 200 AGNs, 75% of which being at low redshifts z<0.5, in the Ursa Major constellation. The spatial 2-point-correlation function (SCF) as well as the minimal spanning tree (MST) technique were applied. Some evidence for clustering is found in the SCF, although with low significance. Using the MST technique, we could find two AGN groups. This result is preliminary and the exact significance will be tested with careful simulations.
121460689
Relativistic Hartree-Fock model with bare nucleon-nucleon interaction for neutron-rich matter
Abstract We study neutron-rich matter in the relativistic Hartree–Fock model (RHF) with the bare nucleon–nucleon interaction. As an important ingredient, we take into account the short range correlation in terms of the unitary correlation operator method (UCOM). We calculate the equations of state (EOS) of neutron-rich matter with Bonn potential. Our results on neutron-rich matter compare very nicely with those in the Relativistic Brueckner–Hartree–Fock (RBHF) theory. On the other hand, when we apply the RHF model with the UCOM on symmetric nuclear matter, the EOS is largely different from the RBHF result particularly in the low density region. This is because the other important ingredient as the tensor interaction plays important role in symmetric nuclear matter. We also discuss the proton and neutron Dirac masses in neutron-rich matter and find that the proton Dirac mass is larger than the neutron mass in agreement with the RBHF theory using projection techniques.
123272027
Extension of Hartree–Fock theory including tensor correlation in nuclear matter
Extension of Hartree–Fock theory including tensor correlation in nuclear matter Jinniu Hu1,2,∗,†, Hiroshi Toki1,∗,†, and Yoko Ogawa1,∗,† 1Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan 2State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China ∗E-mail: jinniuhu@rcnp.osaka-u.ac.jp (JH), toki@rcnp.osaka-u.ac.jp (HT), ogaway@rcnp.osaka-u.ac.jp (YO)