Cross sections for the formation of69Znm,gand71Znm,gin neutron induced reactions near their thresholds: Effect of reaction channel on the isomeric cross-section ratio

2003 ◽  
Vol 68 (2) ◽  
Author(s):  
C. D. Nesaraja ◽  
S. Sudár ◽  
S. M. Qaim
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Channel ◽  
Cross Section Ratio ◽  
Section Ratio ◽  
Isomeric Cross Section Ratio

Activation cross section and isomeric cross-section ratio for the (n,2n) reaction on 132,134Ba

2017 ◽  
Vol 105 (10) ◽  
Author(s):  
Junhua Luo ◽  
Chunlei Wu ◽  
Li Jiang ◽  
Suyuan Li
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Cross Section Ratio ◽  
Activation Cross Section ◽  
Section Ratio ◽  
Isomeric Cross Section Ratio

AbstractCross sections of the

STUDY OF ISOMERIC CROSS-SECTION RATIO AND PRE-EQUILIBRIUM FRACTION IN PROTON AND ALPHA PARTICLE INDUCED NUCLEAR REACTIONS ON 197Au

2012 ◽  
Vol 21 (06) ◽  
pp. 1250059 ◽  
Author(s):  
B. SATHEESH ◽  
M. M. MUSTHAFA ◽  
B. P. SINGH ◽  
R. PRASAD
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Nuclear Reactions ◽  
Energy Difference ◽  
Activation Technique ◽  
Cross Section Ratio ◽  
Excitation Functions ◽  
Section Ratio ◽  
Isomeric Cross Section Ratio ◽  
Equilibrium Emission

Excitation functions for the reactions 197 Au(p,n) 197g Hg and 197 Au(p,n) 197m Hg have been measured over the energy ranges from threshold up to 20 MeV using stacked foil activation technique. The isomeric cross-section ratio σm/(σm+σg) for the formation of 197g, m Hg was determined. The excitation functions and isomeric cross-section ratios were calculated for the reactions 197 Au(p,n) 197g,m Hg , 197 Au(p,2n) 196 Hg , 197 Au(p,3n) 195g,m Hg , 197 Au(p,4n) 194 Hg , 197 Au(p,5n) 193g,m Hg , 197 Au (α, n )200 Tl , 197 Au (α, 2n )199 Tl , 197 Au (α, 3n )198g,m Tl , 197 Au (α, 4n )197 Tl and 197 Au (α, 5n )196g,m Tl from reaction threshold up to 40 MeV for proton induced reactions and 80 MeV for alpha induced reactions. The results were compared with the theoretical cross-sections calculated by means of the code EMPIRE-II and with the available literature data, which makes use of the Hauser Feshbach model for the compound nuclear calculations and the exciton model for the pre-equilibrium emission part. The isomeric cross-section ratio is found to depend strongly on the relative spins of the isomeric and ground state, energy difference between the levels, presence of intermediate states and some dependence on decay modes and on the onset of pre-equilibrium emission.

scholarly journals Influence of reaction channel on the isomeric cross-section ratio

2005 ◽  
Vol 93 (9-10) ◽  
Author(s):  
Syed M. Qaim ◽  
S. Sudár ◽  
A. Fessler
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Reaction Channel ◽  
Cross Section Ratio ◽  
Section Ratio ◽  
Isomeric Cross Section Ratio

SummaryThe influence of reaction channel on the isomeric cross-section ratio was investigated by analysing the experimental data on the reactions

Total-to-K-shell photoelectric cross-section ratios in some rare-earth and high-Z elements

1989 ◽  
Vol 67 (2-3) ◽  
pp. 139-142 ◽  
Author(s):  
S. Chandra Lingam ◽  
K. Suresh Babu ◽  
V. Prakash Kumar ◽  
D. V. Krishna Reddy
Keyword(s):  
Rare Earth ◽  
Cross Section ◽  
Atomic Number ◽  
Cross Sections ◽  
Cross Section Ratio ◽  
Section Ratio ◽  
Photoelectric Cross Section ◽  
Normal Transmission ◽  
Experimental Values ◽  
Good Agreement

The total photoelectric cross-sections in the elements gadolinium, dysprosium, erbium, lutetium, tantalum, tungsten, gold, and lead have been obtained by using the normal transmission experiments, and the results are reported. Using these total photoelectric cross sections, we have found the K-shell photoelectric cross sections, the K-jump ratios, and the total-to-K-shell photoelectric cross-section ratios at the K edges for the above elements. These values are compared with the available theoretical and experimental values. The results are in good agreement with the Storm and Israel results and the Scofield theoretical values, within the limits of experimental uncertainties. Furthermore, the variation of the total-to-K-shell photoelectric cross-section ratio with energy and atomic number is discussed.

Excitation functions and isomeric cross section ratio of theNi58(n,p)58Com,greactions from 2 to 15 MeV

1995 ◽  
Vol 52 (4) ◽  
pp. 1940-1946 ◽  
Author(s):  
Cs. M. Buczkó ◽  
J. Csikai ◽  
S. Sudár ◽  
Á. Grallert ◽  
S. A. Jonah ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Section Ratio ◽  
Excitation Functions ◽  
Section Ratio ◽  
Isomeric Cross Section Ratio
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