The absolute cross sections of photoabsorption, photodissociation, and photoionization of the group VIB metal hexacarbonyls at 300–1600 Å

1997 ◽  
Vol 106 (23) ◽  
pp. 9474-9482 ◽  
Author(s):  
Fei Qi ◽  
Xin Yang ◽  
Shihe Yang ◽  
Fuyi Liu ◽  
Liusi Sheng ◽  
...  
Keyword(s):  
Cross Sections ◽  
Metal Hexacarbonyls ◽  
The Absolute

Measurement of the absolute drell-yan dimuon cross sections in 800 GeV/c pp and pd collisions

2003 ◽  
Vol 721 ◽  
pp. C344-C347 ◽  
Author(s):  
C.A. Gagliardi ◽  
T.C. Awes ◽  
M.E. Beddo ◽  
M.L. Brooks ◽  
C.N. Brown ◽  
...  
Keyword(s):  
Cross Sections ◽  
The Absolute

A measurement of the cross section for production of He + (2 S ) ions by electron impact excitation of ground state helium ions

1966 ◽  
Vol 290 (1420) ◽  
pp. 74-93 ◽  
Keyword(s):  
Plane Wave ◽  
Cross Section ◽  
Cross Sections ◽  
Absolute Magnitude ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Close Coupling ◽  
Born Cross Section ◽  
The Absolute ◽  
The Cross

A crossed beams method has been used to measure the cross section for the production of He + (2 S ) by electrons incident upon He + (1 S ) in the energy range from threshold to 750 eV. The cross section was measured in arbitrary units with an accuracy of ± 5 % and at the higher energies its energy dependence is in close agreement with that calculated by means of the plane-wave Born approximation. Consequently the cross section has been normalized to the plane-wave Born cross section at energies between 435 and 750 eV to obtain the absolute magnitude. An independent estimate of the absolute magnitude was made to with in ± 30 % using only the experimental parameters, and the absolute cross sections given by the two methods agree within the experimental uncertainties. The normalized cross section is compared with cross sections given by the close-coupling approximation and various Coulomb-Born approximations. At the lower energies the normalized cross section is considerably smaller than any of the theoretical values, but the measurements are consistent with the existence of a finite cross section at threshold if the energy spread of the electron beam is taken in to account.

Identification of 26-minute Zr-84

1983 ◽  
Vol 61 (4) ◽  
pp. 754-756 ◽  
Author(s):  
Seiichi Shibata ◽  
Paul J. Karol
Keyword(s):  
Cross Sections ◽  
Half Life ◽  
Production Cross ◽  
Isotopic Distribution ◽  
Absolute Abundance ◽  
Spallation Reactions ◽  
Relative Production ◽  
Γ Ray ◽  
The Absolute ◽  
Mev Protons

An unknown γ-ray of energy 112.5 keV was found in zirconium fractions chemically extracted from isotopically enriched molybdenum targets bombarded with 500 and 800 MeV protons. All evidence suggests that the γ-ray is identifiable with the decay of 84Zr to 84Y. A half-life of 25.7 ± 0.5 min was obtained for 84Zr, which is considerably longer than previously reported half-lives. The absolute abundance of the 112.5 keV γ-ray was also determined. Relative production cross sections for 84Zr were calculated using these results and were consistent with the values interpolated from isotopic distribution curves for spallation reactions.

Determination of the Absolute Photoionization Cross Sections of CH3and I Produced from a Pyrolysis Source, by Combined Synchrotron and Vacuum Ultraviolet Laser Studies†

2010 ◽  
Vol 114 (9) ◽  
pp. 3237-3246 ◽  
Author(s):  
Bérenger Gans ◽  
Luiz A. Vieira Mendes ◽  
Séverine Boyé-Péronne ◽  
Stéphane Douin ◽  
Gustavo Garcia ◽  
...  
Keyword(s):  
Cross Sections ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Laser ◽  
Vacuum Ultraviolet Laser ◽  
The Absolute

The absolute cross sections of the 39K(n, p)39Ar and 39K(n, α)36Cl reactions for 2.46 MeV neutrons

1967 ◽  
Vol 94 (3) ◽  
pp. 617-624 ◽  
Author(s):  
P.B. Johnson ◽  
N.G. Chapman ◽  
J.E. Callaghan
Keyword(s):  
Cross Sections ◽  
The Absolute
Sign in / Sign up

Export Citation Format

Share Document