Published 1988 | Version v1
Miscellaneous Metadata-only

Measurements of photoelectric cross sections for X-ray and X-ray photons at K, L1 and L3 edges in Ce, Gd, Dy, Er, Yb and Pb: an analysis of the derived shell ratios

Creators

  • 1. Sir C.R.R. College, Eluru, A.P. (India). Dept. of Physics

Description

Total photon cross-section measurements are performed employing argon-and krypton-filled proportional counters and a NaI(TI) detector on both sides of the K-edge of the elements, Ce, Er, and Yb and on either side of the L-edge of Gd, Dy, Er, Yb and Pb, using narrow-beam geometry. K-shell photoelectric cross sections are estimated by fitting the extracted photoelectric cross sections to log-log plots on either side and by extrapolation to the K-edge energy. The data on Gd, Er, Yb and Pb after a similar treatment give the values of the photoelectric cross sections at the L1 (upper) and L3 (Lower) edges. The total-to-K-shell ratios derived from the results have been compared with the theoretical values of Storm and Israel and those of Scofield and also with the empirical relation of Hubbell. The total-to-L-shell ratios at the L1-shell binding energy have been compared with the theoretical values of Scofield. There appears to be a general agreement between theory and experiment. (author)

Availability note (English)

Available from the Library of the Comissao Nacional de Energia Nuclear, RJ, Brazil.

Abstract (Portuguese)

Medidas totais de secao de choque de fotons. Sao feitas usando-se contadores proporcionais de argonio e kriptonio e um detetor NaI(TI) em ambos os lados da ponta K dos elementos Ce, Er e Yb e no outro lado da ponta L do Cd, Dy, Er, Yb e Pb usando-se uma geometria estreita. A secao de choque fotoeletrica da camada K e estimada fixando-se a secao de choque fotoeletrica extraida para graficos log-log em cada lado e por extrapolacao da energia na ponta K

Additional details

Publishing Information

Imprint Title
Proceedings of the 4. International Symposium on Radiation Physics
Imprint Pagination
467 p.
Journal Page Range
p. 72-75.

Conference

Title
4. International Symposium on Radiation Physics.
Dates
3-7 Oct 1988.
Place
Sao Paulo, SP (Brazil).

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
21017363
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
BINDING ENERGY; CERIUM; DYSPROSIUM; ERBIUM; GADOLINIUM; GAMMA RADIATION; K SHELL; LEAD; NAI DETECTORS; PHOTOELECTRIC EFFECT; PROPORTIONAL COUNTERS; TOTAL CROSS SECTIONS; X RADIATION; YTTERBIUM
Descriptors DEC
CROSS SECTIONS; ELECTROMAGNETIC RADIATION; ELECTRONIC STRUCTURE; ELEMENTS; ENERGY; IONIZING RADIATIONS; MEASURING INSTRUMENTS; METALS; RADIATION DETECTORS; RADIATIONS; RARE EARTHS; SCINTILLATION COUNTERS; SOLID SCINTILLATION DETECTORS