Resonance capture γ-ray spectrometry at Lead Slowing-down Neutron Spectrometer

Pourimani, Reza; Olejniczak, U; Popov, Yu. P.; Przytula, M.; Wojtkiewicz, R.

doi:10.1016/s0168-9002(02)00434-5

Cited by 5 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…11. This spectrum shows the feasibility of such measurement (HPGe detector not degraded) but a shielding around the HPGe detector would be required to reduce activation of the detector itself [7] and thus the background.…”

Section: Detection Of Delayed Gamma-rays: Setup Nomentioning

confidence: 99%

The Potential of Photon Activation and Neutron Activation Techniques for Fast Soil Characterization

et al. 2020

View full text Add to dashboard Cite

In the frame of a partnership between CEA and VINCI, various measurement techniques are applied to soil analysis and tested in different laboratories located at CEA Saclay (France). This paper deals with two nuclear measurement techniques assessed in this project. More specifically, this paper presents the feasibility study carried out for two non-destructive active methods: photon activation and neutron activation. First, some atomic nuclides are activated either by photons or neutrons. Secondly, gamma-rays of specific energies are emitted by activated nuclides and gamma-ray spectrometry enables to identify these activated nuclides. Calibration of the full measurement system with reference samples would enable to quantify the mass of activated nuclides. Irradiations performed for photon activation measurements were conducted using a linear electron accelerator (linac) as the latter enables to generate high-energy photons by Bremsstrahlung thanks to its conversion target. Furthermore, irradiations performed for neutron activation measurements were also conducted with a linac. Indeed, photons may be converted to neutrons by photonuclear reactions using a secondary target. In the frame of this project, experiments were carried out at the SAPHIR platform (CEA Saclay) with a Linatron-M9 VARIAN linac. The electron energy was either 6 or 9 MeV. For neutron activation measurements, a secondary target made of heavy water has been used as neutron source and a polyethylene cell enabled to thermalize neutrons and increase the number of reactions of interest. In this paper, we present the different experimental setups and the measurement protocols established for this feasibility study. We show experimental results obtained with raw material samples coming from three construction sites.

show abstract

Section: Detection Of Delayed Gamma-rays: Setup Nomentioning

confidence: 99%

The Potential of Photon Activation and Neutron Activation Techniques for Fast Soil Characterization

et al. 2020

View full text Add to dashboard Cite

show abstract

Nuclear Data Sheets for A=182

Singh

Roediger

2010

Nuclear Data Sheets

View full text Add to dashboard Cite

Nuclear spectroscopic information for known nuclides of mass number 182 (Lu,Hf,Ta,W,Re,Os,Ir,Pt,Au,Hg, Tl,Pb) with Z=71 to 82 and N=111 to 100 have been evaluated and presented together with adopted energies and J π o f l e v e l s i n t h e s e n u c l e i . N o e x c i t e d s t a t e d a t a a r e y e t a v a i l a b l e f o r 1 8 2 L u , w h i l e o n l y l i m i t e d s t r u c t u r e i n f o r m a t i o n i s a v a i l a b l e f o r 1 8 2 P b a n d 1 8 2 T l . R o t a t i o n a l b a n d s t r u c t u r e s a r e k n o w n f o r 1 8 2 H g a n d 1 8 2 A u b u t s p i n -p a r i t y a s s i g n m e n t s r e m a i n l a r g e l y t e n t a t i v e . T h e d e c a y s o f 1 8 2 L u , 1 8 2 H g , 1 8 2 A u a n d 1 8 2 T l a r e n o t w e l l established. The 182 Hf isotope is of geophysical and astrophysical interest. This evaluation supersedes previous full evaluations of A=182 published by 1988Fi05 and 1975Sc13, and a selected (mainly high-spin) update of A=182 published by 1995Si04. Cutoff Date: Literature available up to July 15, 2010 has been consulted. General Policies and Organization of Material: See the January issue of the Nuclear Data Sheets or http://www.nndc.bnl.gov/nds/NDSPolicies.pdf. G e n e r a l C o m m e n t s : T h e s t a t i s t i c a l a n a l y s i s o f γ -r a y d a t a a n d d e d u c e d l e v e l s c h e m e s i s c a r r i e d o u t t h r o u g h computer codes available at NNDC, BNL website: www.nndc.bnl.gov. The direct feedings to excited states in β -a n d ε d e c a y s h a v e g e n e r a l l y b e e n c o m p u t e d f r o m I ( γ + c e ) i n t e n s i t y b a l a n c e s a t e a c h l e v e l ; t h e a s s o c i a t e d l o g f t v a l u e s a r e c a l c u l a t e d u s i n g L O G F T c o d e . T h e t o t a l i n t e r n a l c o n v e r s i o n c o e f f i c i e n t s c o r r e s p o n d i n g t o a s s i g n e d m u l t i p o l a r i t i e s a n d m i x i n g r a t i o s a r e t h e o r e t i c a l v a l u e s c a l c u l a t e d u s i n g B r I c c c o d e ( 2 0 0 8 K i 0 7 ) . A general 1.4% uncertainty is assumed in quoted theoretical internal conversion coefficients. All Q values have been adopted from 2003Au03 an 2009AuZZ (an interim mass adjustment file). The static magnetic and quadrupole moments are from 1989Ra17 and 2005St24 compilations when available. Relevant data for A=186 isotopes which decay by α decay to A=182 isotopes have been taken primarily from A=186 NDS (2003Ba44) A c k n o w l e d g m e n t s : T h e e v a l u a t o r s t h a n k M c M a s t e r s t u d e n t s S . G e r a e d t s , M . L e e , G . R e e d a n d J . C h e n k i n f o r compilation of several XUNDL datasets for A=182 nuclides; and Charles Reich (Idaho) for a detailed review of this work and many useful suggestions.

show abstract