Browsing Artículos (Física Atómica, Molecular y Nuclear) by Title
Now showing items 150169 of 794

Decay of metastable states: Mean relaxation time formulation [Article]
(AIP Publishing, 199904)The mean relaxation time formalism introduced by Nadler and Schulten [J. Chem. Phys. 82, 151 (1985)] in their generalized moment expansion method is extended to a general diffusion process in arbitrary dimensions. The ...

Decoherence as a signature of an excitedstate quantum phase transition [Article]
(American Physical Society, 2008)We analyze the decoherence induced on a single qubit by the interaction with a twolevel boson system with critical internal dynamics. We explore how the decoherence process is affected by the presence of quantum phase ...

Decoherence due to an excitedstate quantum phase transition in a twolevel boson model [Article]
(American Physical Society, 2009)The decoherence induced on a single qubit by its interaction with the environment is studied. The environment is modeled as a scalar twolevel boson system that can go through either firstorder or continuousexcitedstate ...

Deltaisobar relativistic meson exchange currents in quasielastic electron scattering [Article]
(Elsevier, 2003)We study the role of the Δisobar current on the response functions for high energy inclusive quasielastic electron scattering from nuclei. We consider a general Lagrangian which is compatible with contact invariance and ...

Density dependence of 2p2h mesonexchange currents [Article]
(American Physical Society, 20170612)We analyze the density dependence of the contribution of mesonexchange currents to the leptonnucleus inclusive cross section in the twoparticle twohole channel. The model is based on the relativistic Fermi gas, where ...

Density functional theory study of the nematicisotropic transition in an hybrid cel [Article]
(AIP Publishing, 2005)We have employed the density functional theory formalism to investigate the nematic–isotropic capillary transitions of a nematogen confined by walls that favor antagonist orientations to the liquid crystal molecules ...

Derivation of a Langevin equation in a system with multiple scales: the case of negative temperatures [Article]
(American Physical Society, 2019)We consider the problem of building a continuous stochastic model, i.e., a Langevin or FokkerPlanck equation, through a wellcontrolled coarsegraining procedure. Such a method usually involves the elimination of the fast ...

Describing resonances in a discrete basis [Article]
(American Physical Society, 20040301)The problem of describing resonances when the continuum is represented by a discrete set of normalizable states is addressed. In particular, here the description of resonances in a transformed harmonic oscillator basis is ...

Description of the 11Li(p,d)10Li transfer reaction using structure overlaps from a full threebody model [Article]
(Elsevier, 2017)Recent data on the differential angular distribution for the transfer reaction 11Li(p,d)10Li at E/A=5.7 MeV in inverse kinematics are analyzed within the DWBA reaction framework, using the overlap functions calculated ...

Determination of the 12C nuclear density through heavyion elastic scattering experiments [Article]
(American Physical Society, 2002)Precise elastic scattering differential cross sections have been measured for the 12C158Ni,208Pb systems at subbarrier energies. The corresponding bare potentials have been determined at interaction distances larger than ...

Determination of U isotopic ratios in environmental samples by ICPMS [Article]
(2000)Inductively coupled plasma mass spectrometry (ICPMS) has been used for the determination of trace elements in a variety of materials. For uranium, the concentration of 238U can be measured with a detection limit of ...

Determining astrophysical threebody radiative capture reaction rates from inclusive Coulomb breakup measurements [Article]
(American Physical Society, 20160412)A relationship between the Coulomb inclusive breakup probability and the radiative capture reaction rate for weakly bound threebody systems is established. This direct link provides a robust procedure to estimate the ...

DHalo nuclei follow rutherford elastic scattering at energies below the barrier? the case of 11Li [Article]
(American Physical Society, 20121226)The first measurement of the elastic scattering of the halo nucleus 11Li and its core 9Li on 208Pb at energies near the Coulomb barrier is presented. The 11Li+208Pb elastic scattering shows a strong reduction with respect ...

Dipolar origin of the gasliquid coexistence of the hardcore 1:1 electrolyte model [Article]
(American Physical Society, 2002)We present a systematic study of the effect of the ion pairing on the gasliquid phase transition of hardcore 1:1 electrolyte models. We study a class of dipolar dimer models that depend on a parameter Rc , the ...

Direct reactions of weaklybound nuclei within a one dimensional model [Article]
(Institute of Physics, 2018)A line of research has been developed to describe structure and dynamics of weaklybound systems with one or more valence particles. To simplify the problem we are assuming particles moving in one dimension and, despite ...

Direct versus sequential fourparticle transfer in heavy ion collisions with superfluid nuclei: Sn+Sn reaction [Article]
(American Physical Society, 1988)The direct transfer of four nucleons in reactions with superfluid systems is compared with the feeding of the same final channel by a successive transfer of correlated nucleon pairs. A quantitative analysis is carried out ...

Discontinuities in the level density of small quantum dots under strong magnetic fields [Article]
(American Physical Society, 2002)Exact diagonalization studies of the level density in a sixelectron quantum dot under magnetic fields around 7 T ("filling factor" around 1/2) are reported. In any spinpolarization channel, two regimes are visible in the ...

Disentangling phase transitions and critical points in the protonneutron interacting boson model by catastrophe theory [Article]
(Elsevier, 2014)We introduce the basic concepts of catastrophe theory needed to derive analytically the phase diagram of the proton–neutron interacting boson model (IBM2). Previous studies [1–3] were based on numerical solutions. We here ...