The stopping power and energy straggling of the energetic C and O ions in polyimide

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F16%3A00459133" target="_blank" >RIV/61389005:_____/16:00459133 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/44555601:13440/16:43887648

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.nimb.2015.09.041" target="_blank" >http://dx.doi.org/10.1016/j.nimb.2015.09.041</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.nimb.2015.09.041" target="_blank" >10.1016/j.nimb.2015.09.041</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The stopping power and energy straggling of the energetic C and O ions in polyimide

Popis výsledku v původním jazyce

The stopping power and energy straggling of C-12(n+) and O-16(n+) heavy ions in the energy range 5.3-8.0 MeV in 8 mu m thick polyimide (PI) foil were measured by means of an indirect transmission method using a half-covered a PIPS detector. Ions scattered from thin gold layer, under the scattering angle 150 degrees were detected and the spectrum of ions penetrating the PI foil and without foil was recorded. The values of the experimentally determined stopping powers were compared to the calculated data by SRIM-2013 and MSTAR codes. Measured data were in good agreement with data calculated by SRIM-2013, especially for C ions was observed better agreement than for O ions. The energy straggling was determined and compared to those calculated by using Bohr's, Bethe-Livingston and Yang models. The measured energy straggling values in the PI foil was corrected for foil roughness and thickness inhomogeneity determined from AFM. Bethe-Livingston predicting formula has been modified to make it appropriate for thicker targets. The energy straggling determined in our experiment was obtained higher than Bohr's predicted value; the predictions by Yang are in good agreement with our experiment. Bethe-Livingston formulation of the energy straggling shows better agreement with the experimental data after the modified formula implementation which assumes that the thick target was consisted to be composed of n-number of thin layers. Influence of the charge-exchange phenomena to the energy straggling of C and O ions in PI was discussed.

Název v anglickém jazyce

The stopping power and energy straggling of the energetic C and O ions in polyimide

Popis výsledku anglicky

The stopping power and energy straggling of C-12(n+) and O-16(n+) heavy ions in the energy range 5.3-8.0 MeV in 8 mu m thick polyimide (PI) foil were measured by means of an indirect transmission method using a half-covered a PIPS detector. Ions scattered from thin gold layer, under the scattering angle 150 degrees were detected and the spectrum of ions penetrating the PI foil and without foil was recorded. The values of the experimentally determined stopping powers were compared to the calculated data by SRIM-2013 and MSTAR codes. Measured data were in good agreement with data calculated by SRIM-2013, especially for C ions was observed better agreement than for O ions. The energy straggling was determined and compared to those calculated by using Bohr's, Bethe-Livingston and Yang models. The measured energy straggling values in the PI foil was corrected for foil roughness and thickness inhomogeneity determined from AFM. Bethe-Livingston predicting formula has been modified to make it appropriate for thicker targets. The energy straggling determined in our experiment was obtained higher than Bohr's predicted value; the predictions by Yang are in good agreement with our experiment. Bethe-Livingston formulation of the energy straggling shows better agreement with the experimental data after the modified formula implementation which assumes that the thick target was consisted to be composed of n-number of thin layers. Influence of the charge-exchange phenomena to the energy straggling of C and O ions in PI was discussed.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BG - Jaderná, atomová a molekulová fyzika, urychlovače

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nuclear Instruments & Methods in Physics Research Section B

ISSN

0168-583X

e-ISSN

—

Svazek periodika

371

Číslo periodika v rámci svazku

MAR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

81-85

Kód UT WoS článku

000373412000015

EID výsledku v databázi Scopus

2-s2.0-84960353408