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Gorokhovskii, A. V.; Gorokhovskii, V. A.; Meshcheryakov, D. V.; Kopchekchi, A. A.

doi:10.1023/a:1022038830599

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…However, a typical enamel compound is usually made from a mixture of (35-60%SiO 2 , 2-15%AlO 2 , 9-25%CaO 2 , 1-25%MgO, and 1-26%FeO, here and elsewhere, wt-%), as well as small impurities of Na 2 O, P 2 O 5 , TiO 2 and small quantities of other oxides. 27 The laboratory gamma spectra measurements were performed using two detectors. A NaI(Tl) detector, 50 mm in diameter, 50 mm in length (BICRON, model 2M2/2) and a high purity germanium (HPGe) coaxial detector (CANBERRA, model GC1518-7500).…”

Section: Methodsmentioning

confidence: 99%

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Passive detection and identification of concealed²⁴¹Am source in transport

Yaar¹,

Peysakhov²,

Hussein³

2008

Packaging, Transport, Storage & Security of Radioactive Mat

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The radioactive isotope 241 Am is one of the most commonly used alpha emitters in civilian applications. As such, the possibility of deliberate contamination of the environment with this isotope is not negligible. Detection of a non-shielded 241 Am source is possible by measuring its characteristic 60 keV gamma ray. However, this gamma ray is easily absorbed when the source is shielded. Therefore, the detection of a concealed 241 Am source should rely on monitoring the source's low intensity gamma rays in the energy ranges of 300 to 400 and 600 to 750 keV, and on the detection of neutrons generated inside the source active volume via the (a,n) reaction. In this work, the gamma spectra and neutron flux associated with an 241 Am source were measured and calculated for several shielding configurations. Based on these results, the minimum time needed for the detection of a concealed 241 Am source was estimated and a concept for passive detection and identification of this source, as well as other alpha emitters, was investigated. This concept was then verified by a set of measurements conducted on an advanced spectroscopic portal located in Haifa harbour.

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Section: Methodsmentioning

confidence: 99%

“…The expected neutron emission rate and energy spectra for a metallic, an oxide ( 241 AmO 2 ) and a ceramic (5% 241 AmO 2 , 45%SiO 2 , 15%AlO 2 , 10%CaO 2 and 25%MgO) 241 Am source, 27 were calculated using the code SOURCES 4A. 22 All of the calculations were performed in homogenous media, with 4000 energy groups.…”

Section: Simulationmentioning

confidence: 99%

Passive detection and identification of concealed²⁴¹Am source in transport

Yaar¹,

Peysakhov²,

Hussein³

2008

Packaging, Transport, Storage & Security of Radioactive Mat

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Countering Nuclear and Radiological Terrorism

Apikyan¹,

Diamond²

2006

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This Series presents the results of scientific meetings supported under the NATO Programme for Security through Science (STS).Meetings supported by the NATO STS Programme are in security-related priority areas of Defence Against Terrorism or Countering Other Threats to Security. The types of meeting supported are generally "Advanced Study Institutes" and "Advanced Research Workshops". The NATO STS Series collects together the results of these meetings. The meetings are co-organized by scientists from NATO countries and scientists from NATO's "Partner" or "Mediterranean Dialogue" countries. The observations and recommendations made at the meetings, as well as the contents of the volumes in the Series, reflect those of participants and contributors only; they should not necessarily be regarded as reflecting NATO views or policy.Advanced Study Institutes (ASI) are high-level tutorial courses to convey the latest developments in a subject to an advanced-level audience Advanced Research Workshops (ARW) are expert meetings where an intense but informal exchange of views at the frontiers of a subject aims at identifying directions for future action Following a transformation of the programme in 2004 the Series has been re-named and re-organised. Recent volumes on topics not related to security, which result from meetings supported under the programme earlier, may be found in the NATO Science Series.

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