tailieunhanh - Stopping powers of alpha particles in some gases at energies from 1.0 to 6 MEV

Stopping powers of α-particles emitted by 148Gd, 241Am and 243Cm isotopes in PR10 and isobutane (C4H10+Ar) gases have been experimentally measured in the energy region from to MeV. The experimental data were compared with those calculated by SRIM-2013 computer code. It was concluded that the experimental stopping powers in our investigated region are in agreement with the calculated values. | Communications in Physics, Vol. 24, No. 3S2 (2014), pp. 8-12 DOI: STOPPING POWERS OF ALPHA PARTICLES IN SOME GASES AT ENERGIES FROM TO 6 MEV LE HONG KHIEM AND TRAN DINH TRONG Institute of Physics, Vietnam Academy of Science and Technology NGUYEN THE NGHIA Department of Nuclear Physics, Faculty of Physics, Hanoi University of Science, Vietnam National University, Hanoi, Vietnam E-mail: lhkiem@ Received 20 June 2014 Accepted for publication 20 August 2014 Abstract. Stopping powers of α-particles emitted by 148 Gd, 241 Am and 243 Cm isotopes in PR10 and isobutane (C4 H10 +Ar) gases have been experimentally measured in the energy region from to MeV. The experimental data were compared with those calculated by SRIM-2013 computer code. It was concluded that the experimental stopping powers in our investigated region are in agreement with the calculated values. Keywords: stopping powers, energy loss, α-particle. I. INTRODUCTION Stopping power of charged particles in different absorbers is an important quantity in many fields of nuclear physics and applications, health physics, radiobiology and other related sciences. The Bethe theory for stopping power has been used for calculating the stopping powers. Owing to its importance, the experimental values of stopping power of charged particles in the wide energy range for different materials have been continually measured until now [1–3]. Furthermore, some computer codes for its estimation have been developed and continuously corrected using available experimental data [4, 5]. Among these codes, SRIM is most popular one and has been used by many researchers who need to know stopping powers of charged particles in certain material. The latest available version of this code is SRIM-2013. In nuclear physics experiments, the different gases are usually used such as for the Parallel Plate Avalanche Counter (PPAC), Multi Sampling Ionization Chamber (MUSIC), active .