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Blanket thermal energy conversion system for a mirror machine
None
Date:
October 26, 1973
Creator:
Peterson, M.A.
System:
The UNT Digital Library
X-ray lasers: necessary conditions
None
Date:
October 26, 1973
Creator:
Slutz, S.; Zimmerman, G. & Lokke, W.
System:
The UNT Digital Library
Threshold effects and oscillations in models with t-channel factorization
From meeting of the division of particles and fields; Berkeley, California USA (13 Aug 1973). Threshold effects and oscillating cross sections are reviewed in the context of models (such as the multiperipheral) which employ factorization and indefinite repetition in the t-channel. The origin of logarithmic energy thresholds is illustrated by the ABFST model and applied to antibaryon production and rising cross sections at high energy. Then one discusses large-mass diffraction dissociation and it is argued that this process is not responsible for the increase in the p-p total cross section at ISR energies. (auth)
Date:
September 26, 1973
Creator:
Koplik, J.
System:
The UNT Digital Library
Comparison of the in situ measurement of terrestrial americium with a Ge(Li) spectrometer and a FIDLER
None
Date:
November 26, 1973
Creator:
Roth, S.J. & Huckabay, G.
System:
The UNT Digital Library
Generation of single 1-ns pulses at 10.6$mu$ without mode locking
None
Date:
January 26, 1973
Creator:
Smith, D. L. & Davis, D. T.
System:
The UNT Digital Library
Detection systems for the low-level radiochemical analysis of iodine-131, iodine-129, and natural iodine in environmental samples
A procedure based on chemicsl separation techniques and activation anslysis was developed for the sequential analysis of low levels of /sup 131/I, / Sup 129/I, and natural iodine in environmental samples. The iodine is first separated from the samples by oxidation. The separated iodine is then counted by low-level, beta-gated gamma spectrometry for the measurement of /sup 131/I. The chemical yield for the separation is measured by means of /sup 125/I tracer. Activation analysis is used for measurement of the separated natural iodine (/sup 127/I) and /sup 129/I. The natural iodine is estimated from either the /sup 126/ I or /sup 128/I activity produced in the sample; the induced /sup 130/I is used to estimate the /sup 129/I concentration. The measurement of /sup 130/I at low levels requires specialized counting methods. Interfering activities that may be present in the irradiated sample include /sup 125/I, /sup 126/I, short-lived fission-product iodine activities produced by activation of uranium impurities, and /sup 82/Br from bromine impurities. Since /sup 130/I decays with several coincident gamma rays, multiple gamma coincidence counting techniques can be used to reduce background and discriminate against interfering activities. Severail three- and four-segmented NaI(Tl) detectors were used for these measurements and compared …
Date:
October 26, 1973
Creator:
Brauer, F.P. & Kaye, J.H.
System:
The UNT Digital Library
Measurement of the mass spectrometer efficiency in the isotopic analysis of very small plutonium samples
None
Date:
June 26, 1973
Creator:
Carver, R.D. & Dupzyk, R.J.
System:
The UNT Digital Library
Computer-controlled sampling system for airborne radionuclides
From nuclear science symposium; San Francisco, California, USA (14 Nov 1973). A computer-controlled air sampling system has been designed and is presently being constnacted. The self-contained, mobile system will collect and record data from eight meteorological sensors. This information will be used in the study of resuspen airborne activity. Air sampler operation will be based on comparisons between the meteorological data and the sampling criteria selected by the operator at the beginning of the run. Correlation between meteorological parameters and resuspension will be used to develop a predictive model. A description of system hardware and a discussion of the software concept are included. (auth)
Date:
November 26, 1973
Creator:
Koval, J. S.; Reichman, J. M. & Fry, C. O.
System:
The UNT Digital Library