Measurement of differential cross-sections and widths of resonances in 32S(p,p'γ) 32S reaction in the 3.0-4.0 MeV region

Pritty Rao; Sanjiv Kumar; S. Vikramkumar; V.S. Raju

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Measurement of differential cross-sections and widths of resonances in 32S(p,p'γ) 32S reaction in the 3.0-4.0 MeV region

机译：在3.0-4.0 MeV范围内测量32S（p，p'γ）32S反应的不同截面和共振宽度

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The paper reports the widths and differential cross-sections of resonances at 3.089,3.379 and 3.717 MeV in the 32S(p,p'Y)32S nuclear reaction. The cross-sections are computed at 0° and 90° angles (relative to the beam direction) from thick target excitation curves constructed by measuring 2230 keV y-rays, charac teristic of the reaction. The differential cross-sections of resonances are about 18,64 and 70 mb/sr respec tively at 0° angle and decrease by about half around an angle of 90°. The first resonance, the sharpest among the three, exhibits a width of about 400 eV while those at 3.379 and 3.717 MeV are in 1.0-1.5 keV range. The widths of the resonances are extracted from the respective thick target excitation curves by an interquartile separation method and also by simulating their leading edges. A study of thick target yields in the 3.0-4.0 MeV proton energy region for several sulphide forming elements shows the absence of any significant interference. These resonances, as a result, can be effectively utilised for sen sitive and high resolution depth profile measurements of sulphur in films and materials surfaces.

机译：该论文报道了32S（p，p'Y）32S核反应中3.089、3.379和3.717MeV处的共振宽度和微分截面。从厚的目标激发曲线（通过测量2230 keV y射线）构建出目标反应曲线，以0°和90°角（相对于光束方向）计算横截面。共振的微分横截面分别在0度角处约为18,64和70 mb / sr，并在90度角处减小约一半。在三个共振中最尖锐的一个共振显示出约400 eV的宽度，而在3.379和3.717 MeV处的共振在1.0-1.5 keV范围内。通过四分位数分离方法并通过模拟其前沿，从各个较厚的目标激励曲线中提取共振的宽度。对几种硫化物形成元素在3.0-4.0 MeV质子能量区域中厚目标产率的研究表明，没有任何明显的干扰。结果，这些共振可以有效地用于薄膜和材料表面中硫的灵敏和高分辨率深度分布测量。

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来源
《Nuclear Instruments & Methods in Physics Research》 |2011年第21期|p.2557-2562|共6页
作者
Pritty Rao; Sanjiv Kumar; S. Vikramkumar; V.S. Raju;
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作者单位

National Centre for Compositional Characterization of Materials, Bhabha Atomic Research Centre, ECIL Post, Hyderabad 500062, India;

National Centre for Compositional Characterization of Materials, Bhabha Atomic Research Centre, ECIL Post, Hyderabad 500062, India;

National Centre for Compositional Characterization of Materials, Bhabha Atomic Research Centre, ECIL Post, Hyderabad 500062, India;

National Centre for Compositional Characterization of Materials, Bhabha Atomic Research Centre, ECIL Post, Hyderabad 500062, India;

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正文语种 eng
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nuclear resonance reaction analysis; sulphur; cross-section; resonance width;

机译：核共振反应分析硫截面共振宽度;

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Measurement of differential cross-sections and widths of resonances in 32S(p,p'γ) 32S reaction in the 3.0-4.0 MeV region

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