Design of an associated particle imaging system

Beyerle, A.; Hurley, John P.; Tunnell, L. N.

doi:10.1016/0168-9002(90)90825-q

Cited by 61 publications

(12 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effort considered a scintillator as the alpha particle transducer and is based on the previous work of Beyerle, Hurley, and Tunnell [3]. A parallel effort within our group is pursuing an alternative design that utilizes a segmented silicon diode detector.…”

Section: Alpha Particle Transducermentioning

confidence: 99%

“…The calculated range was about 7 microns. The model assumed a ZnO(Ga) crystal density of 5.6 g/cm 3 , the theoretical density for ZnO(Ga) and a one percent stoichiometric gallium composition . While the packing density of individual crystals in the binder is not known, these calculations provided a reasonable starting point for specifying coating thicknesses.…”

Section: Alpha Particle Transducermentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of ZnO(Ga) coatings as alpha particle transducers within a neutron generator

Cooper

Koltick

Mihalczo

et al. 2003

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

We report investigations and preliminary results from efforts to develop a recoil alpha particle detector for use in a portable neutron generator. The associated particle sealed tube neutron generator (APSTNG) will be used as an interrogation source for the Nuclear Materials Identification System (NMIS). With the emission of 14.1 MeV neutrons produced by the D-T reaction, associated 3.5 MeV alpha particles are emitted. These neutrons and alphas may then be correlated in time and direction, thus effectively "tagging" the neutrons of interest for subsequent use as an active nuclear materials interrogation source. The alpha particle detector uses a ZnO(Ga) scintillator coating applied to a fiber optic face plate. Gallium-doped zinc oxide is a fast (1.5 ns decay time), inorganic scintillator with a high melting point (1975C) and an absolute light yield of 1.5% of NaI(Tl). The scintillator is coated with a thin layer of nickel in order to screen out light produced in the tube and scattered deuterons and tritons. This coating also serves to prevent the buildup of charge on the detector surface. Results to date indicate promise as an effective alpha particle detector for the APSTNG for future use in the NMIS.

show abstract

Section: Alpha Particle Transducermentioning

confidence: 99%

Section: Alpha Particle Transducermentioning

confidence: 99%

Evaluation of ZnO(Ga) coatings as alpha particle transducers within a neutron generator

Cooper

Koltick

Mihalczo

et al. 2003

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…The fundamental limitation of API is that once a neutron has been produced, time must be allowed for the detection of any gamma-rays that it excited before another neutron is produced hence the yield of the source is severely reduced. 17 Landmines which have already been laid present a problem that will be with us for some time, despite increasing public awareness on a global scale of landmine issues, and the search continues for a reliable sensor.…”

Section: Landminesmentioning

confidence: 99%

Neutron activation analysis challenges: Problems and applications in biomedical and other areas

Spyrou

1999

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Developments in neutron activation analysis in its various modes for trace element determination are described with reference to reactor and other neutron sources, competing methods, tomography and detection systems. A selected number of areas of application are highlighted which provide challenges into the next millennium and to which a useful and in some cases a unique contribution can be made. The role that neutron activation analysis can play in decommissioning, landmine detection, boron neutron capture therapy, Alzheimer's disease, diabetes mellitus, the complex mechanisms of initiation and termination of feeding and obesity as well as in scar formation and the requirements for artificial skin are presented.

show abstract

“…The tagged neutron method (also called the Associated Particle Imaging (API) method) has been widely used [2][3][4][5][6][7][8][9] for constructing explosives and drug detectors, which allow determining elemental composition of the substance hidden in the examined objects of various sizes from hand luggage to shipping containers.…”

Section: Introductionmentioning

confidence: 99%