Accurate determination of Compton backscattering in germanium at 86.5 keV on an absolute scale

Znanstveni rad - Izvorni znanstveni rad

• Autor: Selim Pašić
• Autor: Ksenofont Ilakovac
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Fizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Fizika

Sažetak (engleski)

The double-differential cross section d2σ/dΩdE for Compton backscattering in germanium was measured at the photon energy of 86.5 keV. The experimental setup with two high-purity germanium detectors operating in the coincidence mode was applied. A multiline radioactive source of ^155_63Eu was used as the source of photons. The Compton spectrum with a very small background was obtained. A fast cascade was found to little influence the data due to the 86.5 keV crossover transition. The contribution of a group of processes, which is described as double cross talk between the two detectors, was also studied and results of calculations show their weak intensity. The calculations of other processes were made as in our earlier papers. The values of d2σ/dΩdE were determined to an accuracy of better than 4% on an absolute scale in a broad energy region. The calculated values using the impulse approximation with hydrogenlike wave functions do not reproduce well the cross sections in some energy regions.

• Ključne riječi (engleski): Compton backscattering in germanium; photon energy of 86.5 keV; two HP germanium detectors operating in the coincidence mode; values of d^2 sigma/d Omega dE
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov časopisa: Physical Review A
• Brojčani podaci: vol. 61, br. 3, str. 32722-6
• p-ISSN: 1050-2947
• DOI: https://doi.org/10.1103/PhysRevA.61.032722
• URN:NBN: urn:nbn:hr:217:063396
• Datum objave publikacije: 2000
• URL dokumenta: http://dx.doi.org/10.1103/PhysRevA.61.032722
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: Copyright (2000) by the American Physical Society.
• Datum i vrijeme pohrane: 2019-10-10 18:58:08