title: Parametric normalization for full-energy peak efficiency of HPGe γ-ray spectrometers at different counting positions for bulky sources.
abstract: Application of effective interaction depth (EID) principle for parametric normalization of full energy peak efficiencies at different counting positions, originally for quasi-point sources, has been extended to bulky sources (within ∅30 mm×40 mm) with arbitrary matrices. It is also proved that the EID function for quasi-point source can be directly used for cylindrical bulky sources (within ∅30 mm×40 mm) with the geometric center as effective point source for low atomic number (Z) and low density (D) media and high energy γ-rays. It is also found that in general EID for bulky sources is dependent upon Z and D of the medium and the energy of the γ-rays in question. In addition, the EID principle was theoretically verified by MCNP calculations.
authors.affiliation: China Institute of Atomic Energy, P.O. Box 275-50, Beijing 102413, China. liuynie360@hotmail.com
authors.forename: Nie
authors.initials: N
authors.lastname: Peng
authors.forename: Ni
authors.initials: N
authors.lastname: Bang-Fa
authors.forename: Tian
authors.initials: T
authors.lastname: Wei-Zhi