Dynamics of low-energy nuclear forces for electromagnetic and weak reactions with the deuteron in the Nambu-Jona-Lasinio model of light nuclei

Ivanov, A. N.; Troitskaya, N. I.; Faber, M.

doi:10.1007/s100530050030

Cited by 7 publications

(8 citation statements)

References 50 publications

(200 reference statements)

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“…͑4͒. 26 At the surface, the threshold peak for DEA will be shifted downward in energy due to surface polarization energy shifts so that the peak of the electron capture cross section 0 is shifted to lower energy-in the present case, to an energy below the vacuum level-and so is not directly accessible to our external electron beam. This results in R c decreasing in Eq.…”

Section: A Methyl Iodide On Krypton Filmsmentioning

confidence: 78%

Electron transfer reactions for image and image-derived states in dielectric thin films

Jensen

Sanche

2008

The Journal of Chemical Physics

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We have studied the cross section for electron trapping that occurs at the surfaces and interfaces of a variety of thin dielectric films (n-octane, methanol, n-butanol, and difluoromethane) that are grown on Kr buffer films. When such films are bombarded with electrons of very low incident energies (E less, similar 300 meV), charging cross sections up to the order of 10(-14) cm(2) are measured for submonolayer quantities of a variety of coadsorbed molecules: CH(3)I, CH(3)Br, CH(3)Cl, and CO(2). These huge cross sections are ascribed to the formation of image states at the dielectric film interfaces, which trap incoming electrons and, via coupling to the adsorbate electron affinity levels, dramatically enhance the capture probability. We have also shown that thin film dielectric layer structures can be created which display image-derived states, such as a "quantum well" in a sandwich structure with two "electron barrier" layers surrounding a Kr and adsorbate spacer film. These phenomena are shown to be of a general nature, occurring for a wide variety of molecular thin films, and depend on the dielectric constant and electron affinity of the selected species. We also report the absolute cross section for dissociative electron attachment of submonolayer CH(3)I adsorbed on Kr thin films.

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Section: A Methyl Iodide On Krypton Filmsmentioning

confidence: 78%

Electron transfer reactions for image and image-derived states in dielectric thin films

Jensen

Sanche

2008

The Journal of Chemical Physics

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“…In this letter we investigate the non-nucleonic degrees of freedom in terms of the ∆(1232) resonance and calculate the contribution of the ∆∆ component to the deuteron in the Nambu-Jona-Lasinio model of light nuclei or differently the nuclear Nambu-JonaLasinio (NNJL) model [4,5]. As has been shown in Ref.…”

Section: Introductionmentioning

confidence: 90%

“…As has been shown in Ref. [5] for the description of the experimental value of the cross section for the neutron-proton radiative capture for thermal neutrons the parameter Z should be equal to Z = 0.473. This agrees with the experimental bound [9].…”

Section: Introductionmentioning

confidence: 99%

“…As has been shown in Refs. [5] the NNJL model describes good low-energy nuclear forces for electromagnetic and weak nuclear reactions with the deuteron of astrophysical interest such as the neutron-proton radiative capture n + p → D + γ, the solar proton burning p + p → D + e + + ν e , the pep-process p + e − + p → D + ν e and reactions of the disintegration of the deuteron by neutrinos and anti-neutrinos caused by charged ν e + D → e − + p + p, ν e + D → e + + n + n and neutral ν e (ν e ) + D → ν e (ν e ) + n + p weak currents. A phenomenological Lagrangian of the npD interaction is defined by [4] …”

Section: Introductionmentioning

confidence: 99%

“…In the NNJL model [5] the ∆(1232) resonance is the Rarita-Schwinger field [6] ∆ a µ (x), the isotopical index a runs over a = 1, 2, 3, having the following free Lagrangian [7,8]:…”

Section: Introductionmentioning

confidence: 99%

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On the ΔΔ component of the deuteron in the Nambu-Jona-Lasinio model of light nuclei

2000

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The dependence of low-energy electron attachment to CF3Br on electron and vibrational energy

Marienfeld

Sunagawa²,

Fabrikant³

et al. 2006

The Journal of Chemical Physics

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In a joint experimental and theoretical effort, we have studied dissociative electron attachment (DEA) to the CF3Br molecule at electron energies below 2 eV. Using two variants of the laser photoelectron attachment method with a thermal gas target (T(G) = 300 K), we measured the energy dependent yield for Br- formation over the range E = 3-1200 meV with resolutions of about 3 meV (E < 200 meV) and 35 meV. At the onsets for excitation of one and two quanta for the C-Br stretching mode nu3, downward cusps are detected. With reference to the recommended thermal (300 K) attachment rate coefficient k(A)(CF3Br) = 1.4 x 10(-8) cm3 s(-1), absolute cross sections have been determined for Br- formation. In addition, we studied Br- and (CF3Br)Br- formations with a seeded supersonic target beam (10% CF3Br in helium carrier gas, with a stagnation pressure of 1-4 bars and nozzle temperatures of 300 and 600 K) and found prominent structure in the anion yields due to cluster formation. Using the microwave pulse radiolysis swarm technique, allowing for controlled variation of the electron temperature by microwave heating, we studied the dependence of the absolute DEA rate coefficient on the mean electron energy E over the range of 0.04-2 eV at gas temperatures T(G) ranging from 173 to 600 K. For comparison with the experimental results, semiempirical resonance R-matrix calculations have been carried out. The input for the theory includes the known energetic and structural parameters of the neutral molecule and its anion; the parameters of the resonant anion curves are chosen with reference to the known thermal rate coefficient for the DEA process. For the gas temperature T(G) = 300 K, good overall agreement of the theoretical DEA cross section with the experimental results is observed; moreover, rate coefficients for Br- formation due to Rydberg electron transfer, calculated with both the experimental and the theoretical DEA cross sections, are found to agree with the previously reported absolute experimental values. At T(G) = 300 K, satisfactory agreement is also found between the calculated and experimental attachment rate coefficients for mean electron energies E = 0.04-2 eV. The strong increase of the measured rate coefficients with rising gas temperature, however, could be only partially recovered by the R-matrix results. The differences may result from the influence of thermal excitations of other vibrational modes not included in the theory.

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Dynamics of low-energy nuclear forces for electromagnetic and weak reactions with the deuteron in the Nambu-Jona-Lasinio model of light nuclei

Cited by 7 publications

References 50 publications

Electron transfer reactions for image and image-derived states in dielectric thin films

Electron transfer reactions for image and image-derived states in dielectric thin films

On the ΔΔ component of the deuteron in the Nambu-Jona-Lasinio model of light nuclei

The dependence of low-energy electron attachment to CF3Br on electron and vibrational energy

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