وضعیت یک پروژه "تحقیق و توسعه" از اسلحه پوزیترون در "Horia Hulubei" NIPNE بخارست
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|17272||2008||4 صفحه PDF||سفارش دهید||1718 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Applied Surface Science, Volume 255, Issue 1, 31 October 2008, Pages 46–49
A new positron gun (PG) will enable high sensitivity measurements in applications of positron annihilation spectroscopy in Romania. Some data concerning the design of a modular system for focussing, transport and acceleration of mono-energetic positrons in the range 0.8–50 keV have been obtained and experimenting on moderators and CDBS was performed. We present a short overview of the present status of the project and preliminary results from Coincidence Doppler Broadening Spectroscopy with a 22NaCl source, on Al samples. The entire positron gun system will be designed as a high-vacuum dedicated extension operating with two options: a 50 mCi 22NaCl source and in-line with the NIPNE cyclotron or a new intense compact cyclotron.
A novel project for a positron gun (PG), scheduled for October 2006–December 2008, will enable the development of a positron annihilation laboratory at NIPNE-HH Bucharest, to be used for material studies and applications using mainly CDBS. At present, parallel studies are in course referring to various aspects: design and construction of sub-assemblies, including the experimental set-up, the positron gun facility and the techniques and solutions to be chosen. The PG will be built as a high-vacuum dedicated extension operating with two options: a 50 mCi 22NaCl source and in-line with the NIPNE cyclotron or a new intense compact cyclotron.