The study of the (n, ?) and (n, ? ?) reactions on143Nd

Aldea, L.; Kardon, B.; Schult, O.W.B.; Seyfarth, H.; Wüst, N.

doi:10.1007/bf01409520

Cited by 10 publications

(5 citation statements)

References 12 publications

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“…Several such experiments have been performed with consistent results [1][2][3]. The γα cascades are seen as a continuum distribution in the α spectrum between peaks corresponding to population of the ground and the 1.5 MeV 2+ first excited state of 140 Ce (Fig.1).…”

Section: Introductionsupporting

confidence: 60%

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E1andM1 γ-strength functions inNd144

Voinov

Grimes

2015

Phys. Rev. C

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Both E1 and M1 γ strength functions below the neutron separation energy were analyzed based on experimental data from 143 Nd(n, γ) 144 Nd and 143 Nd(n, γα) 140 Ce reactions. It is confirmed that the commonly adopted E1 model based on the temperature dependence of the width of the giant dipole resonance works well. The popular M1 strength function due to the spin-flip magnetic resonance located at around neutron binding energy is not capable of reproducing experimental data. The low energy enhancement of the M1 strength or the energy independent model of Weisskopf, both leading to the low energy strength sizable to E1 one, fit experimental data best.

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Section: Introductionsupporting

confidence: 60%

“…Model calculations were tested against both the experimental α spectrum from 143 Nd(n, γα) [2] and the experimental γ-spectrum from 143 Nd(n, γ) reactions [25] measured with thermal and 15-90 keV neutrons respectively. The comparison presented in Fig.…”

Section: Methods Of Analysismentioning

confidence: 99%

E1andM1 γ-strength functions inNd144

Voinov

Grimes

2015

Phys. Rev. C

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“…3) in KMF-type analyses [47], agreement to the low energy data near 5 MeV is reached in spite of the large value for Γ . For even lower energy it was proposed to add a component to the Lorentzian which violates the Axel-Brink hypothesis; this has allowed to assign E1-character to the data from 143 Nd(n, γα) [125][126][127] with their strength observed even below 1 MeV. But this neglects the fact, that M1 radiation should be favored [128], similar to what was indicated theoretically for 94−96 Mo [129].…”

Section: Even-even Nucleimentioning

confidence: 76%

Breaking of axial symmetry in excited heavy nuclei as identified in giant dipole resonance data

2017

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Abstract. A recent theoretical prediction of a breaking of axial symmetry in quasi all heavy nuclei is confronted to a new critical analysis of photon strength functions of nuclei in the valley of stability. For the photon strength in the isovector giant dipole resonance (IVGDR) regime a parameterization of GDR shapes by the sum of three Lorentzians (TLO) is extrapolated to energies below and above the IVGDR. The impact of non-GDR modes adding to the low energy slope of photon strength is discussed including recent data on photon scattering and other radiative processes. These are shown to be concentrated in energy regions where various model calculations predict intermediate collective strength; thus they are obviously separate from the IVGDR tail. The triple Lorentzian (TLO) ansatz for giant dipole resonances is normalized in accordance to the dipole sum rule. The nuclear droplet model with surface dissipation accounts well for positions and widths without local, nuclide specific, parameters. Very few and only global parameters are needed when a breaking of axial symmetry already in the valley of stability is admitted and hence a reliable prediction for electric dipole strength functions also outside of it is expected.

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“…The catalytic properties of supported gold catalysts depend on the crystallite size of active metal and the type of metal oxide as supports [2]. Theoretical background of the extended X-ray absorption fine structure (EXAFS) and the X-ray diffraction (XRD) analyses, including the main mathematical properties of the generalized Fermi function (GFF), used for approximation and deconvolution of the experimental X-ray line profiles (XRLP) were presented in papers [3][4][5]. SimPeak computer package program was used for data analysis of the X-ray Photoelectron Spectroscopy (XPS) spectra.…”

Section: Introductionmentioning

confidence: 99%