Author: George Milton JacksPublisher:
ISBN:
Category :
Languages : en
Pages : 124
Book Description
A Study of Thermal and Resonance Neutron Flux Detectors in the Standard File of the Savannah Riber Laboratory
A Study of Thermal and Resonance Neutron Flux Detectors
Author: George M. JacksPublisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 56
Book Description
Measurement of Neutron Flux and Spectra for Physical and Biological Applications
Author: National Committee on Radiation Protection and Measurements (U.S.)Publisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 104
Book Description
Measurement of Neutron Flux and Spectra for Physical and Biological Applications
Author: National Committee on Radiation Protection and Measurements (U.S.)Publisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 104
Book Description
Flux and Spectral Measurements of Primary and Moderated Neutron Sources
Author: E. TochilinPublisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 38
Book Description
Radioactive (a, n) neutron sources include Ra-Be, PuF4, and four PuBe13 sources. Comparative neutron emission rates were determined by two separate methods: (1) the manganese sulfate bath with appropriate corrections made for fast neutron escape or capture and for thermal neutron capture by the source; and (2) long counter measurements corrected for energy response and so rce anisotropy. Agreement to within 1 percent was obtained by the two independent methods. A Ra-Be source calibrated against the NBS neutron standard was used as a primary reference Spectral measurements of PuBe13 and PuF4 neutron sources were made with nuclear emulsions. By the use of cylindrical plastic and lead absorbers, an effort was made to moderate the PuBe13 spectrum and thereby obtain additional calibration points for instrument response studies. Spectral changes were initially studied with the doublemoderator technique, followed by later measurements with nuclear emulsions. From flux and spectral measurements of the primary and moderated radioactive sources, the first collision tissue dose was calculated and, in turn, compared to experimental measurements of absorbed dose with proportional counters designed according to the Bragg-Gray principle. (Author).
Thermal Calibration of the Converted PeeWee Neutron Survey Instrument
Author: Dale E. HankinsPublisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 32
Book Description
Neutron Flux Mapping by Large Detectors
Author: D. R. HarrisPublisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 22
Book Description
Study of Thermal Neutron Flux from SuperKEKB in the Belle II Commissioning Detector
Author: Samuel Rudy DejongPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The Belle II detector is designed to collect data from the high luminosity electron-positron (e+e-) collisions of the SuperKEKB collider. It will explore the flavour sector of particle physics through precision measurements. The backgrounds of particles induced by the electron and positron beams will be much higher than in any previous \epem collider. It is important that these backgrounds be well understood in order to ensure appropriate measures are taken to protect the Belle II detector and minimize the impact of the backgrounds. In February 2016 electron and positron beams were circulated through the two 3 km vacuum pipe rings without being brought into collision during `Phase I' of SuperKEKB commissioning. Beam backgrounds were measured using Belle II's commissioning detector, BEAST II. BEAST II is composed of several small subdetectors, including helium-3 thermal neutron detectors. The BEAST II thermal neutron detector system and results from its Phase I running are presented in this dissertation. The Phase I experiment studies beam-gas interactions, where beam particles collide with residual gas atoms in the beampipes, and beam-beam interactions, where beam particles interact with each other. Simulations of these two types of backgrounds were performed using the Strategic Accelerator Design (SAD) and GEometry And Tracking (GEANT4) software packages. A method to account for the composition of the gas in the beampipes was developed in order to correctly analyse the beam-gas component of the background. It was also determined that the thermal neutron rates in the data on the positron beam were 2.18$^{+0.44}_{-0.42}$ times higher than the simulation of beam-gas interactions and 2.15$^{+0.34}_{-0.33}$ times higher for beam-beam interactions. The data on the electron beam were 1.32$^{+0.56}_{-0.36}$ times higher for beam-gas interactions and 1.91$^{+0.54}_{-0.48}$ time higher for beam-beam interactions. The impact of these studies on Belle II is discussed.
Use of Tungsten-184 as a Thermal Flux Monitor at High Temperatures
Author: Lauren L. BallPublisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 18
Book Description
Dose and Flux Measurements on Godiva Radiation Effects Experiments
Author: Payne S. HarrisPublisher:
ISBN:
Category : Neutron flux
Languages : en
Pages : 24
Book Description