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Titolo:
L x-ray production cross sections in Th and U at 17.8, 25.8 and 46.9 keV photon energies
Autore:
Kumar, A; Puri, S; Shahi, JS; Garg, ML; Mehta, D; Singh, N;
Indirizzi:
Panjab Univ, Dept Phys, Chandigarh 160014, India Panjab Univ Chandigarh India 160014 Dept Phys, Chandigarh 160014, India SLIET, Dept Phys, Longowal 148106, India SLIET Longowal India 148106SLIET, Dept Phys, Longowal 148106, India Punjab Univ, Dept Biophys, Chandigarh 160014, India Punjab Univ Chandigarh India 160014 pt Biophys, Chandigarh 160014, India
Titolo Testata:
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
fascicolo: 4, volume: 34, anno: 2001,
pagine: 613 - 623
SICI:
0953-4075(20010228)34:4<613:LXPCSI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
INNER-SHELL ALIGNMENT; ANGULAR-DISTRIBUTION; AUGER ELECTRONS; FLUORESCENCE YIELDS; PHOTOIONIZATION; ELEMENTS; SUBSHELL; POLARIZATION; DEPENDENCE; EMISSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Kumar, A Panjab Univ, Dept Phys, Chandigarh 160014, India Panjab Univ Chandigarh India 160014 s, Chandigarh 160014, India
Citazione:
A. Kumar et al., "L x-ray production cross sections in Th and U at 17.8, 25.8 and 46.9 keV photon energies", J PHYS B, 34(4), 2001, pp. 613-623

Abstract

The L x-ray production (XRP) differential cross sections in Th and U have been measured at the 17.8 keV incident photon energy (E-L3 < E-inc < E-L2, E-Li is the Li subshell ionization threshold) in an angular range 90 degrees -160 degrees, and at the 25.8 and 46.9 keV incident photon energies (E-L1< E-inc < E-K) at an angle of 130 degrees. The measurements were performedusing the energy dispersive x-ray fluorescence set-up in secondary excitation mode. In contrast to the findings of an earlier experiment (Sharma and Allawadhi 1999 J. Phys. B: At. Mel. Opt. Phys, 32 2343), the present measurements rule out the possibility of a strong angular dependence of differential cross sections for various L-3 subshell x-rays following selective photoionization of the L-3 subshell. Integral L XRP cross sections at the 17.8,25.8 and 46.9 keV photon energies, deduced assuming isotropic emission of the L x-rays, are found to be in good agreement with those evaluated using the most reliable theoretical values of L-i (i = 1, 2, 3) subshell photoionization cross sections, fluorescence yields, x-ray emission rates and Coster-Kronig transition probabilities.

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Documento generato il 27/09/20 alle ore 06:17:54