H*(10) and neutron spectra around linacs

Vega-Carrillo, Hector Rene; Ortíz-Hernandez, Arturo; Hernandez-Davila, Victor Martin; Hernández-Almaraz, Berenice; Montalvo, Teodoro Rivera
February 2010
Journal of Radioanalytical & Nuclear Chemistry;Feb2010, Vol. 283 Issue 2, p537
Academic Journal
Neutron spectrum and ambient dose equivalent has been measured around two 10 MV linear accelerators. Measurements were carried out in Mevatron and Primus model linacs, both made by Siemens. Main differences between those models are the beam collimator and the vault room. Here, Bonner sphere spectrometer with a passive thermal neutron detector has been utilized to measure the neutron spectrum inside the vault. Using an active detector the neutron spectrum was measured at the vault’s door of both accelerators. With a neutron area monitor the dose equivalent was measured by the door at both vault doors. Neutron strength, total fluence rate and ambient dose equivalent were compared, from this was found that shielding conditions are better in the Primus model.


Related Articles

  • Performance comparison of 2.8 MeV and 241Am-Be neutrons based moisture measurement setups. Abdelmonem, M. S.; Naqvi, A. A.; Al-Ghamdi, Hanan; Al-Misned, Ghada // Journal of Radioanalytical & Nuclear Chemistry;Oct2007, Vol. 274 Issue 1, p1 

    Performance of a 241Am-Be neutron source-based and 2.8 MeV neutrons-based moisture measurement setups have been compared using Monte Carlo simulation. In the setup fast neutrons transmitted through the sample were detected by a fast neutron detector, which was placed behind a massive long double...

  • A Multichannel Neutron Collimator for the ITER Tokamak. Krasilnikov, A. V.; Walker, C. I.; Kashchuk, Yu. A.; Prosvirin, D. V. // Instruments & Experimental Techniques;Mar/Apr2004, Vol. 47 Issue 2, p139 

    A concept for the multichannel neutron collimator of the ITER is presented. The design of the collimator is based on the use of a 12-collimator radial neutron camera that was developed earlier and two complementary compact neutron cameras. It is proposed that the compact neutron cameras be...

  • SPECTRA OF PHOTONEUTRONS PRODUCED BY HIGH-ENERGY X-RAY RADIOTHERAPY LINACS. Králík, M.; Turek, K.; Vondráček, V. // Radiation Protection Dosimetry;2008, Vol. 132 Issue 1, p13 

    Spectral fluence of photoneutrons generated in the head of the radiotherapeutic linac Varian 2100 C/D was measured by means of the Bonner spheres spectrometer whose active detector of thermal neutrons was replaced by a track detector, i.e. a sandwich of four CR-39s with the boron radiator...

  • Photocurrent response of B12As2 crystals to blue light, and its temperature- dependent electrical characterizations. Gul, R.; Cui, Y.; Bolotnikov, A. E.; Camarda, G. S.; Egarievwe, S. U.; Hossain, A.; Roy, U. N.; Yang, G.; Edgar, J. H.; Nwagwu, U.; James, R. B. // AIP Advances;2016, Vol. 6 Issue 2, p1 

    With the global shortage of ³He gas, researchers worldwide are looking for alternative materials for detecting neutrons. Among the candidate materials, semiconductors are attractive because of their light weight and ease in handling. Currently, we are looking into the suitability of boron...

  • Neutron spectroscopy with 6LiF bolometers. Gironnet, J.; van den Brandt, B.; Coron, N.; Hautle, P.; Filges, U.; Konter, J. A.; de Marcillac, P.; Ortigoza, Y.; Puimedon, J.; Rolon, T.; Torres, L. // AIP Conference Proceedings;12/16/2009, Vol. 1185 Issue 1, p751 

    A compact and semi-portable neutron detector has been built based on the bolometric technique. Its unique features open new possibilities for the radioprotection survey of fast neutrons at nuclear installations and the investigations of background problems of sensitive neutron scattering...

  • Distinction between DD and DT neutrons in the TFTR neutron collimator. Bitter, M.; Johnson, L.C.; Ku, Long-Poe; Roquemore, A.L.; von Goeler, S. // Review of Scientific Instruments;Feb1997, Vol. 68 Issue 2, p1268 

    Analyzes the contribution of DD and DT neutrons in neutron collimator system. Use of neutral deuterium heating beams and relatively small amounts of tritium; Insufficiency of pulse-shaping techniques; Calculation of the attenuation for the neutron energy spectrum.

  • 209Bi(N,TOT.) CROSS-SECTIONS FOR INCIDENT NEUTRON ENERGIES 0.01-400 eV. Moinul Haque Meaze, A. K. M.; Guinyun Kim // Armenian Journal of Physics;2010, Vol. 3 Issue 3, p155 

    The neutron induced total cross-sections of 209Bi for the energies 0.01 - 400 eV were measured with the neutron time of flight (TOF) method at the pohang neutron facility (PNF), Korea. The PNF consists of a 100 MeV electron linear accelerator (LINAC), a water cooled Tantalum (Ta) target, 12.06 m...

  • TFTR multichannel neutron collimator. Roquemore, A. L.; Chouinard, R. C.; Diesso, M.; Palladino, R.; Strachan, J. D.; Tait, G. D. // Review of Scientific Instruments;Oct90, Vol. 61 Issue 10, p3163 

    The TFTR multichannel neutron collimator provides time-resolved neutron emission profiles from ten vertical chords spaced in major radius across the vacuum vessel. An in situ calibration of the system has been made using a 120 mCi [sup 252]Cf source scanned inside the vacuum vessel. A mapping of...

  • Measurement of DT neutron emission from TFTR with helium-4 proportional recoil counters. McCauley, J. Scott; Strachan, J. D. // Review of Scientific Instruments;Oct92, Vol. 63 Issue 10, p4536 

    The DT neutron emission from Triton Burnup has been measured with four helium-4 proportional counters in TFTR's Multichannel Neutron Collimator. The operating characteristics of an "alpha" recoil proportional counter are presented. The theoretical response function of these detectors, which is...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics