Bremsstrahlung cross-section measurements at the short-wavelength limit

Starek, B.; Aiginger, H.; Unfried, E.

doi:10.1016/0375-9601(72)91059-6

Cited by 12 publications

(3 citation statements)

References 6 publications

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“…The thicknesses of the targets were measured, as they were being manufactured by evaporation, employing the frequency shift of a quartz crystal oscillator. The uncertainties of the absolute DDCSs reported by Starek et al [22] are between 2% and 3%.…”

Section: Introductionmentioning

confidence: 80%

“…To our knowledge, the DDCS at 1 k = were measured in only two occasions. The first experiment was conducted by Starek, Aiginer and Unfried [22], for incident electrons of 1.84 MeV in targets of Li, Al, Cu, Ag, Au and Pb, and the photon emission angle 10 q = . To collect the bremsstrahlung spectra the authors used a coaxial Ge(Li) detector and established its response function (RF) with an 88 Y radioactive source [22].…”

Section: Introductionmentioning

confidence: 99%

“…The first experiment was conducted by Starek, Aiginer and Unfried [22], for incident electrons of 1.84 MeV in targets of Li, Al, Cu, Ag, Au and Pb, and the photon emission angle 10 q = . To collect the bremsstrahlung spectra the authors used a coaxial Ge(Li) detector and established its response function (RF) with an 88 Y radioactive source [22]. The thicknesses of the targets were measured, as they were being manufactured by evaporation, employing the frequency shift of a quartz crystal oscillator.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of doubly differential electron bremsstrahlung cross sections at the end point (tip) for C, Al, Te, Ta and Au

García-Alvarez

Fernández-Varea

Vanin

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

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We have used the low-energy beam line of the São Paulo Microtron accelerator to study the maximum energy transfer point (tip) of electron-atom bremsstrahlung spectra for C, Al, Te, Ta and Au. Absolute cross sections differential in energy and angle of the emitted photon were measured for various electron kinetic energies between 20 and 100 keV, and photon emission angles of 35 • , 90 • and 131 • . The bremsstrahlung spectra were collected with three HPGe detectors and their response functions were evaluated analytically. Rutherford backscattering spectrometry allowed us to obtain the thicknesses of the targets with good accuracy. We propose a simple model for the tip region of the bremsstrahlung spectrum emitted at a given angle, whose adjustable parameters are the mean energy of the incident beam and its spread as well as an amplitude. The model was fitted simultaneously to the pulse-height distributions recorded at the three angles, determining the doubly differential cross sections from the corresponding amplitudes. The measured values have uncertainties between 3% and 13%. The agreement of the experimental results with the theoretical partial-wave calculations of Pratt and co-workers depends on the analyzed element and angle but is generally satisfactory. In the case of Al and Au, the uncertainty attributed to the theory is probably overestimated.

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Section: Introductionmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%