10/5/988
00176782
Author(s):
Title:
(Item 688 from file: 103)
ERA-02-011168; INS-77-001383; EDB-77-014233
Levy,
Y.;
Miller,
D.S.;
Friedman,
G.M.
Fission- and alpha-track study of biogeochemistry of plutonium and
uranium in carbonates of Bikini and Enewetak atolls.
January 1, 1976--December 31, 1976
Corporate Source:
of Geology
Publication Date:
Report Number(s):
Rensselaer Polytechnic Inst.,
Sep
1976
CO0O-3462-13
Contract Number (DOE):
Document Type: Report
Language: English
Journal Announcement:
Troy,
Progress report,
.
N.Y.
p 32
(USA). Dept.
;
EY-76-S-02-3462
,
EDB7701
Availability: Dep. NTIS $4.00.
Subfile:
INS
(US Atomindex input);
(Technical Information Center).
ERA
(Energy Research Abstracts);
TIC
Country of Origin: United States
Country of Publication: United States
Abstract: Alpha emitters have been detected with a resolution of a few tens
of micrometers using a solid state track detector
(cellulose nitrate)
to map the activity in a coral sample from Bikini. Calibration methods
used include: a Pu source of 0.15 ..mu..Ci in conjunction with
polycarbonate and CaCO/sub 3/ absorbers of different thicknesses
30 micrometers),
(2 to
and a powdered coral sample which had been analyzed
previously for alpha emitters by chemical methods in conjunction with
an alpha spectrometer. 0.04 mm/sup 3/ can be measured routinely;
smaller concentrations can be determined but with a lower resolution.
CaCO/sub 3/ of the coral Favites virens from Bikini lagoon was analyzed
by placing the detector directly on the sample for thirty days.
Sections and thin sections cut perpendicular to one another, but
parallel to the direction of coral growth, give very different
concentrations and distributions of alpha emitters. Maximum
concentrations of 800 pCi/g were measured in a volume of 0.004 mm/sup
3/ in void-filling cement separated from the coral and in an area in
which coral skeleton and cement could not be distinguished. Areas of
high alpha emitter concentrations coincide with areas of coral growth
interruption where non coral material exists that is composed of a
mixture of encrusting bryozoan like carbonate material and skeletal
debris.;
Major Descriptors: *BIKINI -- BIOGEOCHEMISTRY; *ENIWETOK -- BIOGEOCHEMISTRY
i; *PLUTONIUM -- BIOGEOCHEMISTRY; *URANIUM -- BIOGEOCHEMISTRY
Descriptors: ALPHA PARTICLES; CALCIUM CARBONATES; CORALS; FISSION TRACKS;
GROWTH
Broader Terms: ACTINIDES; ALKALINE EARTH METAL COMPOUNDS; ANIMALS; CALCIUM
COMPOUNDS; CARBON COMPOUNDS; CARBONATES; CHARGED PARTICLES; CHEMISTRY;
CNIDARIA; ELEMENTS; GEOCHEMISTRY; INVERTEBRATES; ISLANDS; MARSHALL
ISLANDS; METALS; OXYGEN COMPOUNDS; PARTICLE TRACKS; TRANSURANIUM
ELEMENTS
Subject Categories: 510300*
-- Environment, Terrestrial -- Radioactive
Materials Monitoring & Transport -- (-1989)
580400
--
Geochemistry
INIS Subject Categories:
10/5/989
00155198
Author(s):
Title:
--
B31*
(-1989)
-- Land
(Item 689 from file:
ERA-02-003869;
Schell, W.R.
103)
INS-76-021294;
EDB-76-093509
Biogeochemistry of radionuclides in aquatic environments.
progress report,
1975--1976
(Retention of /sup 239/Pu,
Annual
/sup 240/Pu,
and /sup 241/Am in Bikini Lagoon 17-years following nuclear explosions)
Corporate Source:
Washington Univ., Seattle (USA). Lab. of Radiation
Ecology
Publication Date: 15 Jan 1976
p 54
Report Number(s):
Contract Number
Document Type:
RLO-2225-T18-18
(DOE):
Report
E(45-1)-2225-T18
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