UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2015 Meeting


Section: Nuclear and Elementary Particles Physics II


Title:
The energy calibration of the IFIN-HH 3 MV Tandetron using Rutherford Backscattering Spectrometry measurements


Authors:
D. PANTELICA(1), C. R. NITA(1) , R. A. IONESCU(1), P. IONESCU(1), H. PETRASCU(1), M. STRATICIUC(1), I. BURDUCEA(1), M. D. DRACEA(1,2)


Affiliation:
(1) Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH) P.O.B. MG-6, RO-077125, 30 Reactorului St., Magurele, Romania

(2) Faculty of Physics, Bucharest University, 405 Atomistilor St., Magurele, Ilfov, RO-077125



E-mail
draceamariadiana@gmail.com


Keywords:
Tandem, accelerators, Rutherford Backscattering Spectrometry, Energy calibration, Cockcroft-Walton, 16O(á, á) 16O cross section


Abstract:
In this work, we report on the first calibration of the terminal voltage using a technique based on RBS measurements of the 3 MV Cockcroft-Walton tandem accelerator from IFIN-HH, Bucharest. This technique which uses the conventional backscattering spectrometry setup was first proposed in [1]. The energies of the alpha particles from an 239Pu+241Am alpha source are compared with the energies of 4He projectiles backscattered into a silicon detector by carbon and gold layers. Then the position of the 16O(á, á)16O resonance around 3.038 MeV at backscattering angles of 145 degrees and 165 degrees was remeasured. Our results are compared with some recent results reported in the literature. The position of the maximum of the cross section is found at 3033.9 keV, which is in good agreement with the evaluation of Gurbich of 3037.0 keV and with the value given by Demarche and Terwagne of 3031.7 keV [2,3]. The calibration method has been shown to be adequate for a relatively fast calibration of the accelerator in an extended range of terminal voltages from 500 to 2000 kV and the measurement of the differential cross section show that this calibration procedure is suitable for work involving fine resonances.


References:

[1] W. N. Lennard, et al., Nucl. Instr. and Meth. B 45 (1990) 281-284

[2] IBANDL database, https://www-nds.iaea.org/exfor/ibandl.htm

[3] J. Demarche, G. Terwagne, J. Appl. Phys. 100(2006) 124909