By Hem Raj Verma

ISBN-10: 3540302778

ISBN-13: 9783540302773

This e-book is a mix of analytical tools in response to the phenomenon of atomic and nuclear physics. It includes accomplished displays approximately X-ray Fluorescence (XRF), Mössbauer Spectroscopy (MS), X-ray Photoelectron Spectroscopy (XPS), Neutron- Activation research (NAA), Particle caused X-ray Emission research (PIXE), Rutherford Backscattering research (RBS), Elastic cringe Detection (ERD), Nuclear response research (NRA), Particle brought about Gamma-ray Emission research (PIGE), and Accelerator Mass Spectrometry (AMS). those ideas are generally utilized within the fields of drugs, biology, environmental reviews, archaeology or geology et al. and pursued in significant foreign study laboratories.

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98 kV for Cu). As the anode voltage is increased, the Bremsstrahlung radiation spreads toward high energy side and its intensity follows the quadratic relationship of high voltage so that it goes on increasing as anode voltage increases. Besides this, the intensity of characteristic radiation gets saturated after some value of anode voltage. This behavior is manifestation of self-absorption effect in target material. It is known that for V > VK , the electron penetration depth in the target becomes large compared to the maximum depth from which the characteristic X-rays can come out.

1978) who have reported the advantage of better accuracy and deep penetration (∼100 µm) of α-particles into the sample. The Kα X-ray yield of thick targets for alpha particles ranging from 1 to 100 MeV was reported by Castiglioni et al. (1992). 4 Instrumentation/Experimentation 41 proportional to Z12 ) to produce appreciable yields. Moreover, the PIXE work using heavy ions is not yet well established as only a few measurements on the K and L X-ray production cross-sections, in different selected elements, with various selected projectiles, are available (Mokler et al.

Thus with protons of 3 MeV, we cannot detect trace elements having Z < 11. Although it is theoretically possible to detect elements with Z > 6 using protons of 2 MeV yet we can not detect the elements like C, N, etc. due to the limitation caused by the Si(Li) detector (The low energy X-rays of elements with Z < 11 are absorbed in the window of the detector). The choice of protons of 3 MeV energy is thus appropriate. , σK (4 He) ≈ 4 × σK (1 H). Roughly speaking, relative to the cross-sections for 2 MeV protons, the energy of deuterons and α-particle beam and the magnitude of cross-section will vary as follows: σ1,1 (2 MeV) = σ1,2 (4 MeV) and σ1,1 (2 MeV) = σ2,4 (8 MeV)/4 This trend is reminiscent of the stopping powers (discussed in Chap.

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Atomic and Nuclear Analytical Methods: XRF, Mуssbauer, XPS, NAA and Ion-Beam Spectroscopic Techniques by Hem Raj Verma


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