Simulation of nuclear physics experiment: 10 He populated in 2n - PowerPoint PPT Presentation

Simulation of nuclear physics experiment: 10 He populated in 2n transfer reaction Vladimír Macko Team: (Student Charles University in Prague) Tomáš Ingr (Student Palacky University in Olomouc) Supervisor: Vratislav Chudoba (Sector N6, ACCULINNA Group, FLNR) 1

Our aim • Simple modelling of the experiment on 10 He • Determination of effects of various parameters on the resolution of the 10 He excitation spectrum • The most important parameters: – Accuracy of radioactive beam diagnostics – Thickness of the target – Energy resolution of detectors – Angular resolution of detector setup 2

Equipment • ROOT version 5.34/00 (http://root.cern.ch/drupal/) • SIMONE ( http://aculina.jinr.ru/simone.php) Si annular detector Si rectangle detector 3

Scheme of set-up 4

Simulation 8 He + 3 H → 10 He + 1 H 10 He → 8 He + n + n 5

Missing mass method 6

The worst spectrum (Exp 1) The best spectrum (Exp 5) 7

FWHM dependence on the distance of the detector Exp 1 50 2,09 385,0 Exp 2 75 1,07 196,0 Exp 3 100 0,64 128,0 Exp 4 125 0,41 88,4 Exp 5 150 0,30 47,6 Resolution = 80 keV Rings and sectors = 16 8

FWHM dependence on the number of rings and sectors of the detector Distance = 100 mm Resolution = 80 keV Exp 6 8 241,0 Exp 7 16 128,0 73,7 Exp 8 32 FWHM dependence on the resolution of the detector Distance = 100 mm Rings and sectors = 32 Exp 9 40 73,7 Exp 10 80 73,7 Exp 11 120 73,7 9

Conclusion • Energy resolution of Si detectors in the range of our interest does not affect the energy resolution of the 10 He excitation spectrum. • The accuracy of reaction products coordinates of the particles have a significant impact on the energy resolution of the 10 He missing mass spectrum. Thank you for your attention 10