+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Lithium target performance evaluation for low-energy accelerator-based in vivo measurements using gamma spectroscopy



Lithium target performance evaluation for low-energy accelerator-based in vivo measurements using gamma spectroscopy



Applied Radiation and Isotopes 58(3): 321-331



The operating conditions at McMaster KN Van de Graaf accelerator have been optimized to produce neutrons via the (7)Li(p, n)(7)Be reaction for in vivo neutron activation analysis. In a number of earlier studies (development of an accelerator based system for in vivo neutron activation analysis measurements of manganese in humans, Ph.D. Thesis, McMaster University, Hamilton, ON, Canada; Appl. Radiat. Isot. 53 (2000) 657; in vivo measurement of some trace elements in human Bone, Ph.D. Thesis. McMaster University, Hamilton, ON, Canada), a significant discrepancy between the experimental and the calculated neutron doses has been pointed out. The hypotheses formulated in the above references to explain the deviation of the experimental results from analytical calculations, have been tested experimentally. The performance of the lithium target for neutron production has been evaluated by measuring the (7)Be activity produced as a result of (p, n) interaction with (7)Li. In contradiction to the formulated hypotheses, lithium target performance was found to be mainly affected by inefficient target cooling and the presence of oxides layer on target surface. An appropriate choice of these parameters resulted in neutron yields same as predicated by analytical calculations.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 049480473

Download citation: RISBibTeXText

PMID: 12595010

DOI: 10.1016/s0969-8043(02)00346-9


Related references

Variations in lithium target thickness and proton energy stability for the near-threshold 7Li(p,n)7Be accelerator-based BNCT. Physics in Medicine and Biology 52(3): 645-658, 2007

Measurements of radioactive gaseous releases to air from target halls at a high-energy proton accelerator. Health Physics 57(6): 909-916, 1989

High-power liquid-lithium target prototype for accelerator-based boron neutron capture therapy. Applied Radiation and Isotopes 69(12): 1654-1656, 2011

Demonstration of a high-intensity neutron source based on a liquid-lithium target for Accelerator based Boron Neutron Capture Therapy. Applied Radiation and Isotopes 106: 57-62, 2015

High power accelerator-based boron neutron capture with a liquid lithium target and new applications to treatment of infectious diseases. Applied Radiation and Isotopes 67(7-8 Suppl): S278-S281, 2009

Lithium neutron producing target for BINP accelerator-based neutron source. Applied Radiation and Isotopes 61(5): 817-821, 2004

High-power electron beam tests of a liquid-lithium target and characterization study of (7)Li(p,n) near-threshold neutrons for accelerator-based boron neutron capture therapy. Applied Radiation and Isotopes 88: 238-242, 2014

Evaluation of the radioactivity of the pre-dominant gamma emitters in components used at high-energy proton accelerator facilities. Radiation Protection Dosimetry 123(4): 417-425, 2007

An accelerator based system for in vivo neutron activation analysis measurements of manganese in human hand bones. Medical Physics 29(11): 2718-2724, 2002

Dosimetric evaluation of lithium carbonate (Li2CO3) as a dosemeter for gamma-radiation dose measurements. Radiation Protection Dosimetry 134(2): 102-106, 2009

Simulation experiments for planetary gamma-ray spectroscopy by means of thick target high-energy proton irradiations. Abstracts of Papers Submitted to the Lunar and Planetary Science Conference 23: 169-170, 1992

Thermodynamic design data and performance evaluation of the water + lithium bromide + lithium iodide + lithium nitrate + lithium chloride system for absorption chiller. Applied Thermal Engineering 20(8): 707-720, 2000

Evaluation of performance of an accelerator-based BNCT facility for the treatment of different tumor targets. Physica Medica 29(5): 436-446, 2013

Mechanism and performance of a lithium chloride accelerator. Petroleum Science 8(3): 328-334, 2011

31P-NMR-spectroscopy measurements of energy metabolism of in vivo growing ascites tumours following addition of glucose. Acta Oncologica 28(2): 277-281, 1989