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

Simulation of nuclear physics experiment: 10He populated in 2n transfer reaction

Team: Vladimír Macko

(Student Charles University in Prague)

Tomáš Ingr

(Student Palacky University in Olomouc)

Supervisor: Vratislav Chudoba

(Sector N6, ACCULINNA Group, FLNR)

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Our aim

• Simple modelling of the experiment on 10He
• Determination of effects of various parameters on

the resolution of the 10He excitation spectrum

• The most important parameters:

– Accuracy of radioactive beam diagnostics – Thickness of the target – Energy resolution of detectors – Angular resolution of detector setup

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Equipment

• ROOT version 5.34/00 (http://root.cern.ch/drupal/)
• SIMONE (http://aculina.jinr.ru/simone.php)

Si annular detector Si rectangle detector

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Scheme of set-up

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Simulation

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

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Missing mass method

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

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FWHM dependence on the distance of the detector

Resolution = 80 keV

Rings and sectors = 16

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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

FWHM dependence on the number of rings and sectors of the detector

Distance = 100 mm Resolution = 80 keV

FWHM dependence on the resolution of the detector

Distance = 100 mm Rings and sectors = 32

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Exp 6 8 241,0 Exp 7 16 128,0 Exp 8 32 73,7 Exp 9 40 73,7 Exp 10 80 73,7 Exp 11 120 73,7

Conclusion

• Energy resolution of Si detectors in the range of our

interest does not affect the energy resolution of the

10He excitation spectrum.

• The accuracy of reaction products coordinates of

the particles have a significant impact on the energy resolution of the 10He missing mass spectrum.

Thank you for your attention

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