scholarly journals L-shell x-ray production cross sections induced by heavy ion impact: Searching for a universal curve

2019 ◽  
Author(s):  
Javier Miranda
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Heavy Ion ◽  
Universal Curve ◽  
X Ray ◽  
Ion Impact

MATRIX EFFECTS ON K-SHELL IONIZATION CROSS SECTIONS IN Al/Si ALLOYS

2002 ◽  
Vol 12 (01n02) ◽  
pp. 1-5
Author(s):  
M. NEKAB ◽  
Ch. HEITZ
Keyword(s):  
Cross Sections ◽  
Matrix Effects ◽  
Production Cross ◽  
Heavy Ion ◽  
Double Scattering ◽  
Scattering Mechanism ◽  
Ionization Cross ◽  
X Ray ◽  
Ionization Cross Sections ◽  
Shell Ionization

Thick targets consisting in Al/Si alloys were bombarded with 1.0 to 5.0 MeV Ar ions. The K X-ray production cross sections were deduced from the measured yields by using the Merzbacher-Lewis formula extended to heavy ion bombardment. The density dependence on the K X-ray production cross sections of Al and Si was observed. This phenomena can be interpreted within the molecular orbital double-scattering mechanism.

Deduction of Heavy-Ion X-Ray Production Cross Sections from Thick-Target Yields,

1972 ◽  
Vol 6 (3) ◽  
pp. 1257-1257 ◽  
Author(s):  
Knud Taulbjerg ◽  
Peter Sigmund
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Heavy Ion ◽  
Thick Target ◽  
X Ray

K-X RAY PRODUCTION CROSS SECTIONS OF HEAVY LANTHANIDES OVER THE ENERGY RANGE OF 3–40 MeV/amu

1995 ◽  
Vol 05 (01) ◽  
pp. 57-67 ◽  
Author(s):  
K. SERA ◽  
K. ISHII ◽  
H. ORIHARA ◽  
S. MORITA
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Production Cross ◽  
Ionization Cross ◽  
X Ray ◽  
Heavy Lanthanides ◽  
Wide Energy ◽  
Ion Impact ◽  
Ionization Cross Sections ◽  
Ecpssr Theory

Partial K-x ray production cross sections of dysprosium, erbium and lutetium by proton and 3He-ion impact have been measured over the incident energy range of 3-40 MeV/amu. It is found that the measured ionization cross sections become larger in comparison with the prediction of PWBA theory and agree well with the ECPSSR theory in the wide energy region. This fact means that relativistic effect of inner-shell electrons is the most predominant among many effects such as the energy loss and the Coulomb deflection of the projectile and also the effects of polarization and increased binding energy of orbital electrons in the perturbed stationary states.

L X-ray production cross sections of 59

1991 ◽  
Vol 24 (10) ◽  
pp. 2521-2528 ◽  
Author(s):  
M Vigilante ◽  
P Cuzzocrea ◽  
N De Cesare ◽  
F Murolo ◽  
E Perillo ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
X Ray ◽  
Ion Impact

L AND M X-RAY PRODUCTION CROSS SECTIONS OF HEAVY RARF EARTH ELEMENTS IN THE 3-40 MeV/amu PROJECTILE-ENERGY RANGE

1998 ◽  
Vol 08 (04) ◽  
pp. 253-266 ◽  
Author(s):  
K. SERA ◽  
K. ISHII ◽  
H. ORIHARA
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Production Cross ◽  
Projectile Energy ◽  
Ionization Cross ◽  
X Ray ◽  
Ion Impact ◽  
Ionization Cross Sections ◽  
Ecpssr Theory ◽  
First Time

Partial L- and M-x-ray production cross sections for Dy , Er and Lu have been systematically measured over the wide projectile-energy range of 3-40 MeV/amu for proton and 3 He -ion impact, and values of partial x-ray production cross sections were compared with those predicted by the ECPSSR theory. As the result, it is confirmed that the ECPSSR theory gives consistent ionization cross sections for each subshell in L- and M-shells. It is also found that values of x-ray transition rate are correct for Mα,β and Lα12 lines which are predominant in M and L x-ray spectra, respectively. However, it is pointed out that some of the values of x-ray transition rates must be revised, and improved values were obtained experimentally for the first time.

LIGHT ION-INDUCED L-SHELL IONIZATION OF HIGH-Z ELEMENTS

1996 ◽  
Vol 06 (01n02) ◽  
pp. 39-50 ◽  
Author(s):  
E. PERILLO ◽  
P. CUZZOCREA ◽  
N. DE CESARE ◽  
G. SPADACCINI ◽  
M. VIGILANTE
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Wave Functions ◽  
Ionization Cross ◽  
X Ray ◽  
Li Ion ◽  
Ion Impact ◽  
Ionization Cross Sections ◽  
Coupled Channel ◽  
Shell Ionization

L-shell X-ray production cross sections for selected heavy elements (Tl, Pb, Bi), of interest in BIO-PIXE analyses, have been measured by proton and 7 Li ion impact in the energy range 0.8–2.6 MeV and 1.8–3.3 MeV respectively. Further, production cross sections for 7 Li ion impact on Au between 1.0 and 2.4 MeV have been measured. L-subshell ionization cross sections have been extracted and arranged, together with similar results from other laboratories, in an analysis aiming at testing the performance of various theoretical approximations in the description of the ionization process. The disagreement observed at low values of the reduced velocity parameter ξ R L between the data and the predictions of the ECPSSR model is significantly reduced by using a United Atom approximation in the treatment of the binding correction, suggested by our group (ECPSSR-UA). The remaining discrepancies, mostly for the L 1-subshell, are almost completely removed by replacing the screened hydrogenlike wave functions with the more realistic Dirac-Hartree-Slater ones. In the case of 7 Li ions, especially for L 2-subshell, also a more refined Coulomb deflection correction and more sophisticated coupled channel calculations are needed.

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