Published April 1974 | Version v1
Report Restricted

Regolith history from cosmic-ray-produced isotopes

Creators

Description

A statistical model is given for soil development relating meteoroid impacts on the moon to cosmic-ray-produced isotopes in the soil. By means of this model, the average lunar mass loss rate during the past 14 aeons is determined to be 170 g/sq cm aeon and the soil mixing rate to be approximately 200 cm/aeon from the gadolinium isotope data for the Apollo 15 and 16 drill stems. The isotope data also restrict the time variation of the meteoroid flux during the past 14 aeons. (U.S.)

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Additional titles

Augmented title (English)
Statistical model

Publishing Information

Imprint Pagination
16 p.
Report number
N--74-26277

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
6205821
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
COSMIC RADIATION; GADOLINIUM; ISOTOPES; LOSSES; MASS; METEOROIDS; MOON; SOILS; STATISTICS; TIME DEPENDENCE
Descriptors DEC
ELEMENTS; IONIZING RADIATIONS; MATHEMATICS; METALS; RADIATIONS; RARE EARTHS; SATELLITES

Optional Information

Secondary number(s)
NASA-CR--134261; SAO--404-069.