نتایج جستجو برای: 252cf
تعداد نتایج: 176 فیلتر نتایج به سال:
زمینه و هدف: امروزه استفاده از شبیهسازی برای تعیین دقیق پارامترهای دزیمتری اجتنابناپذیر است. در این مطالعه پارامترهای دزیمتری 252Cf-AT به‌عنوان یک چشمه نوترونی براکی تراپی با استفاده از شبیهسازی مونتکارلو محاسبه میشود که در درمان برخی از سرطانهای رحم و تومورهای مغزی کاربرد دارد. روش بررسی: ویژگیهای فیزیکی و هندسی چشمه کالیفورنیوم-252 مدل AT ب...
Bonner spheres system is one of the ways of measuring neutron energy distribution which is often applied in spectrometry and neutron dosimetry. This system includes a thermal neutron detector, being located in the center of several polyethylene spheres, and it is still workable due to the isotropic response of the system which in turn is derived from the spherical symmetry of moderators and the...
Sir: Plasma desorption (PD), such as that induced by the 100-MeV fission products of z5zCf, is a particularly promising ionization method for large molecules (1-5), yielding molecular inn species even from trypsin, molecular weight 23463. Further, with trypsin using nitrocellulose as the substrate, (M + 3H)3+ is the most abundant molecular ion species and (M + 6H)fi+ is measurable ( 4 ) , which...
PURPOSE The aim of this study was to retrospectively observe and analyze the long-term treatment outcomes of 191 elderly patients with esophageal squamous cell cancer (ESCC) who were treated with californium-252 (252Cf) neutron brachytherapy (NBT) in combination with external beam radiotherapy (EBRT). MATERIAL AND METHODS From January 2002 to November 2012, 191 patients with ESCC underwent NB...
Increasing growth of terrorist's activities and threats to date and illegal transit of cargo led to the discovery and detection systems which have a lot of development. In this paper, Prompt Gamma Neutron Activation Analysis (PGNAA) technique has been used to discovery and detection of materials. Besides using simulated hypothetical system, should also pay special attention to safety radiation ...
The utility of a new mass spectrometric technique for detecting and identifying peptide by-products produced in the synthesis of peptides is demonstrated. The technique involves three sequential steps: (1) practically nondestructive 252Cf plasma desorption mass spectrometric analysis of monolayer amounts of the peptide(s) of interest bound to a thin layer of nitrocellulose; (2) enzyme-catalyzed...
Fluorescence Nuclear Track Detectors (FNTDs) are part of a new technology developed for particle detection and applicable to personal neutron dosimetry. The objective this study is simulate the FNTD fast response to: (i) assess understand performance existing dosimeter design (Landauer Inc.) its associated single layer track-spots analysis; (ii) evaluate potential information that can be obtain...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید