Bremsstrahlung energy spectra from electrons of kinetic energy 1 keV ≤ T1 ≤ 2000 keV incident on neutral atoms 2 ≤ Z ≤ 92

Pratt, R. H.; Tseng, H. K.; Lee, C.M.; Kissel, Lynn; MacCallum, C. J.; Riley, Merle E.

doi:10.1016/0092-640x(77)90045-6

Cited by 239 publications

(75 citation statements)

References 9 publications

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“…Analytical formulae, using a high energy approximation, are used above 50 MeV, and accurate numerical results of [32] below 2 MeV. Uncertainties range between 2% and 5%.…”

Section: A Reference Data: the Nist-estar Databasementioning

confidence: 99%

Comparison of Geant4 electromagnetic physics models against the NIST reference data

Amako

Guatelli

Ivanchenko

et al. 2005

IEEE Trans. Nucl. Sci.

169

103

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Abstract-The Geant4 Simulation Toolkit provides an ample set of physics models describing electromagnetic interactions of particles with matter. This paper presents the results of a series of comparisons for the evaluation of Geant4 electromagnetic processes with respect to United States National Institute of Standards and Technologies (NIST) reference data. A statistical analysis was performed to estimate quantitatively the compatibility of Geant4 electromagnetic models with NIST data; the statistical analysis also highlighted the respective strengths of the different Geant4 models.

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“…Analytical formulae, using a high energy approximation, are used above 50 MeV, and accurate numerical results of [32] below 2 MeV. Uncertainties range between 2% and 5%.…”

Section: A Reference Data: the Nist-estar Databasementioning

confidence: 99%

Comparison of Geant4 electromagnetic physics models against the NIST reference data

Amako

Guatelli

Ivanchenko

et al. 2005

IEEE Trans. Nucl. Sci.

169

103

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“…As was mentioned in Refs. [19][20][21], the stopping power of electrons in the energy range of 2 to 50 MeV can be determined with an accuracy of less than 10%. We estimated the shift of proton peak arising from β pile-up near 1500 keV to be 13(2) keV via the GEANT4 simulation.…”

mentioning

confidence: 99%

Measurement of the⁵²Fe mass via the precise proton-decay energy of⁵³Co^m

Shen

Liu

et al. 2016

EPJ Web of Conferences

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Nuclear mass continues to be of great importance for various aspects of nuclear physics, for instance, it is the basic building blocks of nuclear structure and nuclear astrophysics. In the study of nuclear structure, the mass of nucleus is an important parameter to validate the model theories and provide a limitation on parameters of theories. In nuclear astrophysics, masses of many nuclei far from line of stability play a vital role in the calculation of stellar nucleosynthesis. Since there is difficulties in measuring the key reaction of nuclear synthesis directly, the precise nuclei mass data can help us judge the importance of each possible nuclear synthesis path. Fe is indicated as a waiting point in stable nuclear burning on an accreting neutron star [5]. Its proton capture rate, which has a direct correlation with its mass, is one of the most important nuclear physics input parameters for the calculations of steady state burning on an accreting neutron star. Therefore, the mass of Fe 52 is an important input parameter in both nuclear structure and nuclear astrophysics.Mass measurements are pursued worldwide. There are a variety of ways that can determine the nuclear mass. The methods of measurement can be classified into two groups, direct and indirect method. The indirect measurement is an important way to determine the masses of nuclei, especially for the nuclei where the direct measurement is very difficult. There are two main indirect methods, Article available at

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“…Those cross-sections are based on calculations by Pratt et al (1977Pratt et al ( , 1981 who used a partial-wave method for screened nuclei. Seltzer & Berger (1986) extended the results by linear extrapolation to obtain the cross-section for hydrogen and also included bremsstrahlung produced in the field of atomic electrons.…”

Section: Comparison Of the Bremsstrahlung Cross-sections Used In Solamentioning

confidence: 99%

The non-Maxwellian continuum in the X-ray, UV, and radio range

Dudík

Kašparová

Dzifčáková

et al. 2012

A&A

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Aims. We investigate the X-ray, UV, and also the radio continuum arising from plasmas with a non-Maxwellian distribution of electron energies. The two investigated types of distributions are the κ-and n-distributions. Methods. We derived analytical expressions for the non-Maxwellian bremsstrahlung and free-bound continuum spectra. The spectra were calculated using available cross-sections. Then we compared the bremsstrahlung spectra arising from the different bremsstrahlung cross-sections that are routinely used in solar physics.Results. The behavior of the bremsstrahlung spectra for the non-Maxwellian distributions is highly dependent on the assumed type of the distribution. At flare temperatures and hard X-ray energies, the bremsstrahlung is greatly increased for κ-distributions and exhibits a strong high-energy tail. With decreasing κ, the maximum of the bremsstrahlung spectrum decreases and moves to higher wavelengths. In contrast, the maximum of the spectra for n-distributions increases with increasing n, and the spectrum then falls off very steeply with decreasing wavelength. In the millimeter radio range, the non-Maxwellian bremsstrahlung spectra are almost parallel to the thermal bremsstrahlung. Therefore, the non-Maxwellian distributions cannot be detected by off-limb observations made by the ALMA instrument. The free-bound continua are also highly dependent on the assumed type of the distribution. For n-distributions, the ionization edges disappear and a smooth continuum spectrum is formed for n 5. Opposite behavior occurs for κ-distributions where the ionization edges are in general significantly enhanced, with details depending on κ and T through the ionization equilibrium. We investigated how the non-Maxwellian κ-distributions can be determined from the observations of the continuum and conclude that one can sample the low-energy part of the distribution from the continuum.

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Bremsstrahlung energy spectra from electrons of kinetic energy 1 keV ≤ T1 ≤ 2000 keV incident on neutral atoms 2 ≤ Z ≤ 92

Cited by 239 publications

References 9 publications

Comparison of Geant4 electromagnetic physics models against the NIST reference data

Comparison of Geant4 electromagnetic physics models against the NIST reference data

Measurement of the⁵²Fe mass via the precise proton-decay energy of⁵³Co^m

The non-Maxwellian continuum in the X-ray, UV, and radio range

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Bremsstrahlung energy spectra from electrons of kinetic energy 1 keV ≤ T1 ≤ 2000 keV incident on neutral atoms 2 ≤ Z ≤ 92

Cited by 239 publications

References 9 publications

Comparison of Geant4 electromagnetic physics models against the NIST reference data

Comparison of Geant4 electromagnetic physics models against the NIST reference data

Measurement of the52Fe mass via the precise proton-decay energy of53Com

The non-Maxwellian continuum in the X-ray, UV, and radio range

Contact Info

Product

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Measurement of the⁵²Fe mass via the precise proton-decay energy of⁵³Co^m