JWK International Corporation

Annandale, VA, United States

JWK International Corporation

Annandale, VA, United States
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Zhou D.Z.,Chinese Academy of Sciences | Wang C.,Chinese Academy of Sciences | Sun Y.Q.,Chinese Academy of Sciences | Liang J.B.,Chinese Academy of Sciences | And 5 more authors.
18th International Conference on Cold Fusion 2013, ICCF 2013 | Year: 2013

Energy of low energy nuclear reactions (LENRs) is clean, cheap, sustainable and can solve all environmental problems. Linear Energy Transfer (LET) spectrum method using CR-39 detectors is the best method to investigate particles generated in LENRs. This paper introduces LET method and presents LET spectra and energy distributions for particles produced in Pd + D reactions obtained by re-analyzing the original data measured with CR-39 detectors by SPAWAR group using LET spectrum method. © 2015 ISCMNS. All rights reserved. ISSN 2227-3123.

Forsley L.P.,JWK International Corporation | Mosier-Boss P.A.,Massachusetts Institute of Technology | McDaniel P.J.,University of New Mexico | Gordon F.E.,U.S. Navy
Electrochimica Acta | Year: 2013

There have been a number of efforts to measure charged particle emissions in the Pd/D system. In general, two approaches have been employed. One approach was to indirectly detect charged particles by measuring Pd K-shell X-rays that should be created as charged particles traverse through the Pd lattice. The other approach utilized CR-39, a solid state nuclear track detector (SSNTD). With these detectors, a charged particle creates an ionization trail in the plastic that, upon etching, leaves a symmetric pit. The size, depth of penetration, and shape of the pits provides information about the mass, charge, energy, and direction of motion of the particles. While experiments done using CR-39 solid state nuclear track detectors have shown the presence of these charged particles, X-ray measurements of the Pd K-shell Xrays have not. The most significant difference between the two measurement techniques is that CR-39 is a constantly integrating detector and the X-ray measurements are done in real time. In this communication, this apparent discrepancy between the two charged particle measurement techniques is examined using known alpha sources. © 2012 Elsevier Ltd. All rights reserved.

Zeissler C.J.,U.S. National Institute of Standards and Technology | Forsley L.P.G.,JWK International Corporation | Lindstrom R.M.,U.S. National Institute of Standards and Technology | Newsome S.,SeaBotix Inc. | And 2 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2013

A nondestructive analytical method based on autoradiography and gamma spectrometry was developed to perform activity distribution analysis for particulate samples. This was applied to aerosols collected in Fukushima Japan, 40 km north of the Daiichi nuclear power plant for a 6 week period beginning shortly after the March 2011 tsunami. For an activity distribution of 990 "hot particles" from a small filter area, the hottest particle was nearly one Bq 137?134CS but most of the activity in the filter was produced by particles having\50 mBq each. 134CS/137Cs activity ratios corrected to March 20, 2011 ranged from 0.68 (uc = 28 %) to 1.3 (uc = 15 %). The average ratio for a large quantity of particles was 0.92 (uc = 4 %). Virtually all activity collected was beta and not alpha, suggesting little if any direct fuel debris was present at this site and time. These findings are expected to assist with separate efforts to better understand the emission events, radionuclide transport and potential environmental or biological uptake. The methods should be applicable to general environmental, radiotoxicological and similar studies for which activity distribution and particle chemistry are of importance. © Akadémiai Kiadó, Budapest, Hungary 2012.

Marwan J.,Dr Marwan Chemie | McKubre M.C.H.,SRI International | Tanzella F.L.,SRI International | Hagelstein P.L.,Massachusetts Institute of Technology | And 6 more authors.
Journal of Environmental Monitoring | Year: 2010

In his criticisms of the review article on LENR by Krivit and Marwan, Shanahan has raised a number of issues in the areas of calorimetry, heat after death, elemental transmutation, energetic particle detection using CR-39, and the temporal correlation between heat and helium-4. These issues are addressed by the researchers who conducted the original work discussed in the Krivit and Marwan (K&M) review paper. © 2010 The Royal Society of Chemistry.

Mosier-Boss P.A.,Systems Center Pacific | Dea J.Y.,Systems Center Pacific | Forsley L.P.G.,JWK International Corporation | Morey M.S.,CA Technologies | And 3 more authors.
EPJ Applied Physics | Year: 2010

Solid state nuclear track detectors (SSNTDs), such as CR-39, have been used to detect energetic charged particles and neutrons. Of the neutron and charged particle interactions that can occur in CR-39, the one that is the most easily identifiable is the carbon breakup reaction. The observation of a triple track, which appears as three alpha particle tracks breaking away from a center point, is diagnostic of the 12C(n, n ′)3α carbon breakup reaction. Such triple tracks have been observed in CR-39 detectors that have been used in Pd/D co-deposition experiments. In this communication, triple tracks in CR-39 detectors observed in Pd/D co-deposition experiments are compared with those generated upon exposure to a DT neutron source. It was found that both sets of tracks were indistinguishable. Both symmetric and asymmetric tracks were observed. Using linear energy transfer (LET) curves and track modeling, the energy of the neutron that created the triple track can be estimated. © 2010 EDP Sciences.

Mosier-Boss P.A.,Systems Center Pacific | Forsley L.P.G.,JWK International Corporation | Carbonnelle P.,Catholic University of Leuven | Morey M.S.,CA Technologies | And 3 more authors.
Radiation Measurements | Year: 2012

A solid state nuclear track detector, CR-39, was exposed to DT neutrons. After etching, the resultant tracks were analyzed using both an optical microscope and a scanning electron microscope (SEM). In this communication, both methods of analyzing DT neutron tracks are discussed. © 2011 Elsevier Ltd. All rights reserved.

Mosier-Boss P.A.,Systems Center Pacific | Forsley L.P.G.,JWK International Corporation | Carbonnelle P.,Catholic University of Leuven | Morey M.S.,CA Technologies | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

CR-39 detectors were exposed to DT neutrons generated by a Thermo Fisher model A290 neutron generator. Afterwards, the etched tracks were examined both optically and by scanning electron microscopy (SEM). The purpose of the analysis was to compare the two techniques and to determine whether additional information on track geometry could be obtained by SEM analysis. The use of these techniques to examine triple tracks, diagnostic of ≥9.6 MeV neutrons, observed in CR-39 used in Pd/D co-deposition experiments will also be discussed. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

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