Thick-target external-bremsstrahlung spectra of [sup 147]Pm and [sup 35]S [beta] rays

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.1308· OSTI ID:7369063

Dhaliwal, A S ^[1]; Powar, M S; Singh, M ^[2]

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1. School of Basic and Applied Sciences, Thapar Institute of Engineering and Technology, Patiala 147 001 (India)
2. Physics Department, Punjabi University, Patiala 147 002 (India)

External-bremsstrahlung spectra excited by soft [beta] particles of [sup 147]Pm ([ital E][sub [beta]][sup max]=225 keV) and [sup 35]S ([ital E][sub [beta]][sup max]=167 keV) in targets of Al, Cu, Sn, and Pb have been studied. The experimental and theoretical results are compared in terms of the number of photons of energy [ital k] per [ital m][sub 0][ital c][sup 2] per unit photon yield to exclude the uncertainty in the source strength measurement and overcome the inherent inadequacy of the normalization procedure used by earlier workers. The results of present measurements for medium- and high-[ital Z] elements show better agreement with the theory of Tseng and Pratt [Phys. Rev. A 3, 1714 (1976)] than with Elwert's corrections [Ann. Phys. (N.Y.) 34, 78 (1939)] to the Bethe-Heitler theory [Proc. R. Soc. London Ser. A 14, 83 (1934)], particularly at the higher-energy ends. However, for low-[ital Z] elements, both theories are found to be adequate.

• OSTI ID: 7369063
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:2; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

663210* -- Ground-State Radioactivity-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM
BETA DECAY RADIOISOTOPES
BETA PARTICLES
BETA-MINUS DECAY RADIOISOTOPES
BETHE-HEITLER THEORY
BOSONS
BREMSSTRAHLUNG
CHARGED PARTICLES
COPPER
DAYS LIVING RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEAD
LIGHT NUCLEI
MASSLESS PARTICLES
METALS
NUCLEI
ODD-EVEN NUCLEI
PHOTONS
PROMETHIUM 147
PROMETHIUM ISOTOPES
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPECTRA
SULFUR 35
SULFUR ISOTOPES
TIN
TRANSITION ELEMENTS
YEARS LIVING RADIOISOTOPES