Level densities of transitional Sm nuclei

Capote, R.; Ventura, A.; Cannata, F.; Quesada, J.

doi:10.1103/physrevc.71.064320

Cited by 15 publications

(6 citation statements)

References 40 publications

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“…E shell = E tot − E LDM where E tot is the experimental total binding energy [103] (or theory [100] if not available experimentally) and E LDM is the phenomenological binding energy of the spherical liquid drop given by The vibrational state density ω vib (E x , M, π) is then folded in with the incoherent particle-hole state density ω ph (E x , M, π) as was suggested in [104]. This folding procedure corresponds to the well known adiabatic approximation and implies that no coupling occurs between the vibrational excitations and the incoherent particle-hole excitations.…”

Section: Microscopic Combinatorial Level Densities (Hfbm)mentioning

confidence: 99%

EMPIRE-3.2 Malta modular system for nuclear reaction calculations and nuclear data evaluation Users Manual

Herman¹,

Capote²,

Sin³

et al. 2013

Self Cite

106

104

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EMPIRE is a modular system of nuclear reaction codes, comprising various nuclear models, and designed for calculations over a broad range of energies and incident particles. The system can be used for theoretical investigations of nuclear reactions as well as for nuclear data evaluation work. Photons, nucleons, deuterons, tritons, helions ( 3 He), α's, and light or heavy ions can be selected as projectiles. The energy range starts just above the resonance region in the case of a neutron projectile, and extends up to few hundred MeV for heavy ion induced reactions. The code accounts for the major nuclear reaction models, such as optical model, Coupled Channels and DWBA (ECIS06 and OPTMAN), Multi-step Direct (ORION + TRISTAN), NVWY Multi-step Compound, exciton model (PCROSS), hybrid Monte Carlo simulation (DDHMS), and the full featured Hauser-Feshbach model including width fluctuations and the optical model for fission. Heavy ion fusion cross section can be calculated within the simplified coupled channels approach (CCFUS). A comprehensive library of input parameters based on the RIPL-3 library covers nuclear masses, optical model parameters, ground state deformations, discrete levels and decay schemes, level densities, fission barriers, and γ-ray strength functions. Effects of the dynamic deformation of a fast rotating nucleus can be taken into account in the calculations (BARFIT, MOMFIT).The results can be converted into the ENDF-6 format using the accompanying EM-PEND code. Modules of the ENDF Utility Codes and the ENDF Pre-Processing codes are applied for ENDF file verification. The package contains the full EXFOR library of experimental data in computational format C4 that are automatically retrieved during the calculations.EMPIRE contains the resonance module that retrieves data from the electronic version of the Atlas of Neutron Resonances by Mughabghab (not provided with the EMPIRE distribution), to produce resonance section and related covariances for the ENDF-6 formatted files. EMPIRE can be used to determine covariances of the calculated data using either sensitivity matrices along with the KALMAN code or employing Monte Carlo approach to produce model generated covariances. In both cases experimental data can be taken into account, either directly (KALMAN) or by feeding the EMPIRE calculated Monte Carlo modelling covariance as a prior to the least square fitting GANDR system. Publication quality graphs can be obtained using the powerful and flexible plotting package ZVView. Interactive plots with ZVView comparing experimental results with calculations can be produced with ENDVER modules.The backbone of the EMPIRE system are bash-shell UNIX scripts that provide for seamless console operation of EMPIRE on Linux, Mac OS X, and Microsoft Windows with GNU gfortran compiler installed. Additionally, the graphical interface, provides for an easy operation of the system on Linux, Mac OS X and virtual Linux machines running on Microsoft Windows. was implemented in the HMS-EMPIRE. This version also included combi...

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Section: Microscopic Combinatorial Level Densities (Hfbm)mentioning

confidence: 99%

EMPIRE-3.2 Malta modular system for nuclear reaction calculations and nuclear data evaluation Users Manual

Herman¹,

Capote²,

Sin³

et al. 2013

Self Cite

106

104

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“…We have calculated E2 transition properties of 144−145 Nd in the framework of IBM-2. Even-even Sm [4,59,60,[65][66][67][68] and Ce [5,6,69,70] we show the B(E2;…”

Section: Resultsmentioning

confidence: 64%

IBM-2 calculations of some even–even neodymium nuclei

Türkan¹,

Inci²

2007

Phys. Scr.

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In this study, we determined the most appropriate Hamiltonian that is needed for present calculations of nuclei in the A≅130 region by the view of projection of IBM-2 parameters onto IBM-1. The interacting boson model has been widely used for describing the quadrupole collective states of the medium heavy nuclei and no distinction is made between proton and neutron variables when the first version of the model (IBM-1) is applied. So, triaxiality can be described explicitly, through the introduction of cubic terms in the boson operators. However, the microscopic foundations state certainly that it is very important to describe the proton and neutron variables explicitly. This is also a generalized definition of the second version of the IBA-model (IBM-2 model). Using the best-fitted values of parameters in the Hamiltonian of the IBM-2, we have calculated energy levels and B(E2) values for a number of transitions in 144,146,148,150,152,154Nd. The results were compared with the previous experimental and theoretical data and it is observed that they are in good agreement. Many B(E2) values that are still not known so far are stated and the set of parameters used in these calculations is the best approximation that has been carried out so far. It has turned out that the interacting boson approximation (IBA) is fairly reliable for the calculation of spectra in the entire set of 144,146,148,150,152,154Nd isotopes.

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“…The second cause is due to the NLD behaviour at low energies. The introduction of low-lying collective discrete states within the pairing gap by a convolution of collective and single-particle states [10] should improve the situation. More reliable conclusions are expected after asymmetry NLD enhancements for both the inner and outer barriers are considered.…”

Section: Discussionmentioning

confidence: 99%

Neutron-induced fission cross section on actinides using microscopic fission energy surfaces

Sin

Capote

Goriely

et al. 2007

Nd2007

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Abstract. Microscopic Hartree-Fock-Bogolyubov (HFB) calculations are now available and can provide all the nuclear ingredients required to describe the fission path from the equilibrium deformation up to the nuclear scission point. The aim of this paper is to apply the basic features of the optical model for fission, using the full microscopic information obtained from HFB models to calculate neutron-induced fission cross sections on selected actinide nuclei. This approach includes not only the details of the energy surface along the fission path, but also the estimate of the nuclear level density derived within the combinatorial approach on the basis of the same HFB single-particle properties, in particular at the fission saddle points. The sensitivity of the calculated fission transmission coefficients to different model approximations is studied and the predictive power of such a microscopic approach tested.

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Level densities of transitional Sm nuclei

Cited by 15 publications

References 40 publications

EMPIRE-3.2 Malta modular system for nuclear reaction calculations and nuclear data evaluation Users Manual

EMPIRE-3.2 Malta modular system for nuclear reaction calculations and nuclear data evaluation Users Manual

IBM-2 calculations of some even–even neodymium nuclei

Neutron-induced fission cross section on actinides using microscopic fission energy surfaces

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