| Use of the BD-100R as a neutron spectrometer through applied pressure variation. | |
| | |
MedLine Citation:
|
PMID: 2019503 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
A study was undertaken to demonstrate the feasibility of using the well-characterized BD-100R neutron bubble dosimeter as a neutron spectrometer in low-level radiation fields. The BD-100R dosimeters used in this work consisted of a test tube containing an elastic polymer with interspersed droplets of two types of Freon: Freon-12 and Freon-114. Each superheated liquid droplet is a potential nucleation site, with the minimum energy needed to form a bubble at the nucleation site being inversely proportional to the square of the difference between the applied and the vapor pressure (i.e., Emin alpha(delta P)-2. For a given dose, the number of bubbles formed continually decreases with increasing applied pressure, until a pressure is reached where no bubbles are formed, since the energy transferred can no longer vaporize the Freon. This investigation is intended to demonstrate the feasibility of measuring an unknown spectrum utilizing the dosimeter response (number of bubbles formed) as a function of the neutron energy (applied pressure). A set of 12 dosimeters was exposed under various applied pressures in a well-characterized neutron energy spectrum at the East Beam Port (EBP) of the Maryland University Training Reactor (MUTR). The dosimeters were placed inside a pressure chamber that could accommodate up to 18 dosimeters. Energy response coefficients (cross-sections) were obtained by spectral unfolding techniques on the known spectrum. The same set of dosimeters were then irradiated using a paraffin-moderated Pu/Be source. Measured spectral estimates obtained using the response coefficients were compared with numerical computations generated using the ANISN computer code. The results indicate that further research using the BD-100R as a neutron spectrometer in low radiation fields is warranted. |
| | |
Authors:
|
B White; D Ebert; F Munno |
Related Documents
:
|
12137273 - Rapid thermogravimetric measurements of boiling points and vapor pressure of saturated ... 23387603 - Co(2)-helium and co(2)-neon mixtures at high pressures. 1575943 - Increased systemic and renal vascular sensitivity to angiotensin ii in normotensive men... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Health physics Volume: 60 ISSN: 0017-9078 ISO Abbreviation: Health Phys Publication Date: 1991 May |
Date Detail:
|
Created Date: 1991-05-30 Completed Date: 1991-05-30 Revised Date: 2000-12-18 |
Medline Journal Info:
|
Nlm Unique ID: 2985093R Medline TA: Health Phys Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 703-8 Citation Subset: IM |
Affiliation:
|
Department of Materials and Nuclear Engineering, University of Maryland, College Park 20742. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Neutrons* Radiometry / instrumentation* Spectrum Analysis / instrumentation* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Investigation of aerial dispersion of radioactive dust from an open-pit uranium mine by passive viny...
Next Document: RBE vs. dose for low doses of high-let radiations.