Prompt Gamma Activation Analysis with the Texas Cold Neutron Source

Ünlü, Kenan; Ríos-Martínez, C.; Wehring, B.W.

doi:10.1007/bf02041928

Cited by 20 publications

(1 citation statement)

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“…In this regard, particular attention, deserved the study of mesitylene. Due to its high protonic density, good resistance to radiation [10][11][12], easy handling and the existence of low-energy rotational modes, mesitylene has been recommended and also used as a moderator for a cold neutron source [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Design and performance of a compact subthermal neutron source for an Electron Linear Accelerator

et al. 2013

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We present the design, construction and performance of a compact subthermal neutron source to be operated at the Bariloche Electron LINAC. The design was based on the premise of keeping the moderator temperature stable at 77 K for at least seven hours without refilling liquid nitrogen. Two moderator materials in semi-cylindrical geometry were studied: polyethylene and mesitylene. The effective moderator volumes were optimized by Monte Carlo simulations. Experimental data and calculations corresponding to the neutron production as a function of the neutron energy for those materials at room temperature and at 77 K were compared. We observed that the rate of subthermal neutrons, compared to epithermal neutrons, increases up to five times for both moderators when they are cooled down.

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Section: Introductionmentioning

confidence: 99%

Design and performance of a compact subthermal neutron source for an Electron Linear Accelerator

et al. 2013

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Prompt γ‐Neutron Activation Analysis

Oliveira

Salgado

Carvalho

2000

Encyclopedia of Analytical Chemistry

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Prompt γ‐neutron activation analysis (PGNAA) is a multielemental analytical technique based on the detection of γ‐rays emitted by excited nuclei following neutron radioactive capture or neutron inelastic scattering. The accumulated count rate relative to the γ‐ray energy characteristic of a certain isotope depends on its concentration. Measurements take place during sample irradiation. The technique can provide accurate information on the elemental composition of materials in a broad range of cases: raw materials, mineral exploration, contaminants, detection of forbidden products, such as drugs and explosives, inspection of containers and applications in health care. Among the main advantages of the PGNAA technique are: faster results; nondestructiveness; flexible sample requirements; bulk sample analysis; in situ application by direct on‐line measurement; detectable unique signatures for most elements; improved accuracy for short‐lived elements; low residual activity. On the other hand, the most significant limitations are: higher detection limits (DLs) as compared with delayed γ‐neutron activation analysis (DGNAA); longer irradiation times; single (one‐cycle) sample irradiation; impracticability of enhancing a specific isotope contribution by radiochemical or physical (half‐life) separation techniques; requirement for relatively larger samples.

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Beams and Facilities

Lindstrom

Révay

2004

Handbook of Prompt Gamma Activation Analysis

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Prompt Gamma Activation Analysis with the Texas Cold Neutron Source

Cited by 20 publications

References 8 publications

Design and performance of a compact subthermal neutron source for an Electron Linear Accelerator

Design and performance of a compact subthermal neutron source for an Electron Linear Accelerator

Prompt γ‐Neutron Activation Analysis

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