Radium in Arctic surface water

The transpolar drift is strongly enriched in 228Ra accumulated on the wide Arctic shelves with subsequent rapid offshore transport. We present new data of Polarstern expeditions to the central Arctic and to the Kara and Laptev seas. Because 226Ra activities in Pacific waters are 30% higher than in Atlantic waters, we correct 226Ra for the Pacific admixture when normalizing 228Ra with 226Ra. The use of 228Ra decay as age marker critically depends on the constancy in space and time of the source activity, a condition that has not yet adequately been tested. While 228Ra decays during transit over the central basin, ingrowth of 228Th could provide an alternative age marker. The high 228Th/228Ra activity ratio (AR = 0.8-1.0) in the central basins is incompatible with a mixing model based on horizontal eddy diffusion. An advective model predicts that 228Th grows to an equilibrium AR, the value of which depends on the scavenging regime. The low AR over the Lomonosov Ridge (AR = 0.5) can be due to either rapid transport (minimum age without scavenging 1.1 year) or enhanced scavenging. Suspended particulate matter load (derived from beam transmission and particulate 234Th) and total 234Th depletion data show that scavenging, although extremely low in the central Arctic, is enhanced over the Lomonosov Ridge, making an age of 3 years more likely. The combined data of 228Ra decay and 228Th ingrowth confirm the existence of a recirculating gyre in the surface water of the eastern Eurasian Basin with a river water residence time of at least 3 years.

Annotated record and radium content of the detailed examination of manganese nodules from lakes in Karelia, Russia

The radioactivity of bottom sediments has been but little investigated. Data published by Joly, Pettersson, Piggot and Iimori refer to determinations of radium, contained mainly in oceanic deep-water sediments in red clays, radiolarian, globigerina oozes, blue muds and manganese concretions. The determinations have shown the manganese concretions to be richest as regards content of radium (up to 10-8 per cent); red clays and radiolarian ooze also possess a rather high content of radium. Other types of sediments are less rich in radium.

Epidemiological follow-up of the New Jersey radium cases...progress report to...

"Contract AT(30-1)-2181."

Radium : A bibliography of unclassified literature /

Includes indexes.

Le Journal de physique et le radium.

Issues for 1920- include section: Exposé et mises au point bibliographique (called Revue bibliographique, 1920-1947; called Mises au point bibliographiques, 1948-1949)

The radium terrors : a mystery story /

Mode of access: Internet.

Radium report of the Memorial hospital, New York.

1st report has title: Radium therapy in cancer at the Memorial Hospital, New York.

The mineral industry of the British Empire and foreign countries. Statistics, 1920-1922. Uranium (Radium) minerals.

At head of title: Imperial Mineral Resources Bureau.

The mineral industry of the British Empire and foreign countries. Statistics, 1919-1921. Uranium (Radium) minerals.

At head of title: Imperial Mineral Resources Bureau.

The fundamentals of X-ray and radium physics.

Mode of access: Internet.

Advisory report on the health effects of radium in drinking water /

"Project no. 90.002."

Risk assessment of exposure to radium and fluoride in Illinois public water supplies /

Prepared for Illinois Dept. of Energy and Natural Resources, Energy and Environmental Affairs Division.

The radium terrors,

Mode of access: Internet.