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in subjects: "Cadmium 113"

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Study of parity nonconservation with epithermal neutrons

The authors describe a new generation of experiments studying the weak interaction between nucleons. Measurements of the effect of this interaction are few in number and the significance of the observed effects are generally small. It is well known that the weak interaction violates parity. This was first experimentally established by C.S. Wu through measurement of an asymmetry of electrons emitted in the beta-decay of polarized {sup 60}Co. The measured asymmetry was large because beta decay is… more

Date: September 1996

Creator: Seestrom, S. J.; Bowman, J. D.; Knudson, J. N. & Yuan, V.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

New results from Los Alamos in the study of parity violation in neutron P-resonances

The TRIPLE collaboration has made major improvements in our experimental apparatus with a new polarizing spin filter, larger beam size, and new detectors. The result of these improvements is a factor of 20 improvement in the experimental uncertainty that can be obtained in a given running time. We have obtained improved data on {sup 232}Th and {sup 238}U, as well as new data on {sup 113}Cd, In, Ag, and Nb. The sign effect previously observed in {sup 232}Th has been reproduced, but other nuclei … more

Date: August 1, 1994

Creator: Seestrom, S. J.; Alde, D.; Bowman, J. D.; Frankle, C. M.; Green, A. A.; Crawford, B. E. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Experiments on parity violation in the compound nucleus

Results from experiments that measure parity-violating longitudinal asymmetries in the scattering of epithermal neutrons from compound-nuclear resonances at the Manuel Lujan Neutron Scattering Center at Los Alamos are discussed. Parity non-conserving asymmetries have been observed for many p-wave resonances in a single target. Measurements were performed on several nuclei in the mass region of A-100 and A-230. The statistical model of the compound nucleus provides a theoretical basis for extrac… more

Date: September 1, 1996

Creator: Bowman, J. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Measured cadmium burnup in C reactor HCR`s

C Reactor horizontal control rods were originally designed to have 32 feet of poison, made of 64 six inch ``cans`` each consisting of two concentric cylinders sealed at each end and the annular space between them filled with boron carbide powder. It was discovered before startup that under irradiation the neutron, alpha reaction in the boron could cause a pressure buildup and rupture of the sealed section. As an expediency cylinders wrapped with 72 miles thick cadmium metal were substituted for… more

Date: May 3, 1961

Creator: Chitwood, R. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Low-level radioactive waste from nuclear power generating stations: Characterization, classification and assessment of activated metals and waste streams

Since the enactment of 10 CFR Part 61, additional difficult-to-measure long-lived radionuclides, not specified in Tables 1 2 of Part 61, have been identified (e.g., {sup 108m}Ag, {sup 93}Mo, {sup 36}Cl, {sup 10}Be, {sup 113m}Cd, {sup 121m}Sn, {sup 126}Sn, {sup 93m}Nb) that may be of concern in certain types of waste. These nuclides are primarily associated with activated metal and perhaps other nuclear power low-level waste (LLW) being sent to disposal facilities. The concentration of a radionu… more

Date: February 1993

Creator: Thomas, V. W.; Robertson, D. E. & Thomas, C. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Process for Removing and Detoxifying Cadmium From Scrap Metal Including Mixed Waste

Cadmium-bearing scrap from nuclear applications, such as neutron shielding and reactor control and safety rods, must usually be handled as mixed waste since it is radioactive and the cadmium in it is both leachable and highly toxic. Removing the cadmium from this scrap, and converting it to a nonleachable and minimally radioactive form, would greatly simplify disposal or recycling. A process now under development will do this by shredding the scrap; leaching it with reagents which selectively d… more

Date: July 1, 1994

Creator: Kronberg, J. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Detection of cadmium radioactivity in the marine environment

Sediment and tissues from different marine organisms recently collected atolls of the Marshall Islands have been found to contain measurable amounts of /sup 113m/Cd previously deposited to the atolls during the testing of nuclear devices at the Pacific Proving Grounds. /sup 113m/Cd has been also detected in some internal organs of mullet collected from the east coast of the United States in an area contaminated only with global fallout debris. This is one of the few summaries to show that this … more

Date: December 1, 1980

Creator: Noshkin, V. E.; Wong, K. M.; Eagle, R. J. & Anglin, D. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

NUCLEAR CHEMISTRY RESEARCH. Annual Report, January 1965-January 1966

Research results under the contract for the period January 1965 to January 1966 are summarized.

Date: January 1, 1966

Creator: Wolke, R.L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Medical application of neutron capture. gamma. -ray spectroscopy: measurement of cadmium and nitrogen in living human subjects. [/sup 113/Cd, /sup 14/N, /sup 15/N]

In-vivo measurement of small quantities of Cd is possible due to the high radiative neutron-capture cross-section of /sup 113/Cd (12.3%, 20000 b). Under slow neutron capture in /sup 113/Cd, the excited /sup 114/Cd decays by prompt emission of cascade of gamma-rays of which the most intense is the 559 keV transition from the first excited state to the ground state. For a total kidney or liver dose of 670 mrem, the detection limits are 2.5 mg or 1.5 ..mu..g/g respectively. A table shows the resul… more

Date: January 1, 1978

Creator: Vartsky, D; Ellis, K J & Cohn, S H

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Low-level radioactive waste from nuclear power generating stations: Characterization, classification and assessment of activated metals and waste streams

Since the enactment of 10 CFR Part 61, additional difficult-to-measure long-lived radionuclides, not specified in Tables 1 2 of Part 61, have been identified (e.g., [sup 108m]Ag, [sup 93]Mo, [sup 36]Cl, [sup 10]Be, [sup 113m]Cd, [sup 121m]Sn, [sup 126]Sn, [sup 93m]Nb) that may be of concern in certain types of waste. These nuclides are primarily associated with activated metal and perhaps other nuclear power low-level waste (LLW) being sent to disposal facilities. The concentration of a radionu… more

Date: February 1, 1993

Creator: Thomas, V. W.; Robertson, D. E. & Thomas, C. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

NEW CROSS SECTION NEEDS FOR ZIRCONIUM HYDRIDE SNAP REACTORS.

No Description Available.

Date: January 1, 1968

Creator: Ottewitte, E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Critical concentrations of cadmium in human liver and kidney measured by prompt-gamma neutron activation

Few data exist on Cd metabolism in human beings. In particular, data are needed on the role of parameters such as age, sex, weight, diet, smoking habits, and state of health. Prompt-gamma neutron activation analysis (PGNAA) provides the only currently available means for measuring in vivo levels of liver and kidney Cd. The method employs an 85 Ci, /sup 235/Pu,Be neutron source and a gamma ray detection system consisting of two Ge(Li) detector. The dose delivered to the liver and left kidney is … more

Date: January 1, 1979

Creator: Cohn, S.H.; Vartsky, D.; Yasumura, S.; Zanzi, I. & Ellis, K.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Long-lived light mass element half-lives (A < 125)

Reported values of half-lives of light and intermediate mass elements are evaluated. The evaluation analysis estimates the systematic error and the resulting standard deviation. Recommended values are then presented for tritium, /sup 10/Be, /sup 14/C, /sup 26/Al, /sup 39/Ar, /sup 40/K, /sup 50/V, /sup 53/Mn, /sup 76/Ge, /sup 87/Rb, /sup 92/Nb, /sup 107/Pd, /sup 113/Cd, /sup 115/In, and /sup 123/Te. 106 refs., 15 tabs. (WRF)

Date: January 1, 1985

Creator: Holden, Norman E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Light mass elements total half-lives for selected long-lived nuclides

In the past, many compilations and evaluations of half-lives have been made which have uncritically accepted authors' values and uncertainties. They have merely recommended weight-averaged reported results. This evaluation attempts to reanalyze each experiment in the literature including an estimate of the standard deviation utilizing, where possible, an estimate of the systematic error. This paper constitutes a preliminary step in the process of recommending values. The long-lived nuclides of … more

Date: January 1, 1985

Creator: Holden, Norman E.

Item Type: Article

Partner: UNT Libraries Government Documents Department