Large-angle elastic scattering of 88.03-keV photons by elements with 30⩽Z⩽92

Rayleigh, Compton and K-shell radiative resonant Raman scattering in 83Bi for 88.034keV γ-rays

“…The present measured Rayleigh scattering cross-sections for the Pt, Au, Pb and Bi elements at the 88.034 keV photon energy are given in Table 1 [16,24]. The present measured radiative resonant Raman scattering cross-sections in Bi for the 88.034 keV photons are given in the Table 2.…”

“…At the incident photon energies above the K-shell binding energy, the MFASF cross-sections show one or two sharp oscillations spanned over an energy region of about 100 eV, both at the 30°(forward) and 130°(backward) angles (Fig. 4 of [16]). These oscillations are associated with sharp changes in the values of ASFs (g 0 and g 00 ) as function of photon energy.…”

“…The direct spectrum of the 109 Cd source placed at the target position was taken to check its purity and no extra peaks could be identified except the W K X-rays resulting from fluorescence of the source backing [16]. The direct spectrum was also used to estimate contribution of the Ge K X-ray escape peaks corresponding to detection of the 88.034 keV c-rays and their intensity was found to be $0.3% of the 88.034 keV peak.…”

Recent experimental studies of photon–atom scattering in the X-ray energy region

“…The present report embodies a review of recent measurements (Puri et al, 1996;Shahi et al, 1997Shahi et al, , 1998Shahi et al, , 2001Kumar et al, 2001aKumar et al, , 2001bKumar et al, , 2002aKumar et al, , 2002bSingh et al, 2004a, b) of the large-angle total atom elastic, inelastic and resonance Raman scattering differential cross-sections performed by our group in the Xray energy region (o100 keV). These measurements were performed using energy dispersive X-ray fluorescence set up involving radioisotope as a photon source and a solid-state photon detector arranged in an annular geometry suitable for large-angle measurements.…”

“…Our group have performed extensive measurements of the differential cross-sections for elastic scattering of (a) 88.03 keV photons by 17 elements with 30pZp92 at 125 o scattering angle (x ¼ 6.31 Å À1 ) (Kumar et al, 2001a); (b) 59.54 keV photons by 19 elements with 13pZp82 at 1301 angle (x ¼ 4.35 Å À1 ) (Puri et al, 1996); by 42 elements with 12pZp92 at 1211 angle (x ¼ 4.17 Å À1 ) (Shahi et al, 1998); and by 33 elements with 13pZp92 at 591 angle (x ¼ 2.365 Å À1 ) (Singh et al, 2004b); (c) 22.1 keV photons by 30 elements with 12pZp92 at 1171 angle (x ¼ 1.519 Å À1 ) (Shahi et al, 1997) and by 15 elements with 6pZp81 at 1331 angle (momentum transfer, x ¼ 1.638 Å À1 ) (Kumar et al, 2002a); (d) 14.93 keV photons by 30 elements with 6pZp92 at 141 o angle (x ¼ 1.135 Å À1 ) (Singh et al, 2004a) . The uncertainty in the measured values was estimated to be $6-9%.…”