Resonance Integral for the Doppler Measurement in Fast Reactors by the Foil-Activation Technique

The excitation functions of 51V [(α, xn), x = 1.3; (α, p3n); (α, α3n) (α, 2α)] and 59Co[(α, 2n); (α, αxn); x = 1, 2] reactions were measured up to 50 MeV by the stacked-foil activation technique and high-resolution Ce(Li)–HPGe spectroscopy method. Of these 51V(α, xnypzα) reactions were studied for the first time with better accuracy than earlier measurements, which were done with a poor resolution scintillation–Ge(Li) detectors some 20 years ago. In the case of 59Co, existing data show large discrepancies at low energy. Comparisons are presented with the prediction of hybrid and exciton models. While for the (α, xn) type of reactions, reasonably explainable pre-equilibrium contributions are found, there seem to be indications of direct inelastic scattering effects in the (α, αxn) type of reactions.

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ALPHA-INDUCED REACTIONS IN ANTIMONY

International Journal of Modern Physics E ◽

10.1142/s0218301394000103 ◽

1994 ◽

Vol 03 (01) ◽

pp. 239-248 ◽

Cited By ~ 5

Author(s):

M.K. BHARDWAJ ◽

I.A. RIZVI ◽

A.K. CHAUBEY

Keyword(s):

Excitation Function ◽

Beam Energy ◽

Gamma Ray ◽

Computer Code ◽

Reaction Yield ◽

Activation Technique ◽

Model Calculations ◽

Equilibrium Fraction ◽

Foil Activation ◽

Stacked Foil Activation Technique

The excitation function of α-induced reactions on 121Sb and 123Sb has been measured. The α-beam energy ranges from 55.0±0.5 MeV to 21.9±1.2 MeV. In these experiments, the stacked foil activation technique was used. The reaction yield was measured by counting the gamma ray activity produced by the alpha-induced reactions. Results so obtained were compared with the calculations from the geometry-dependent hybrid (GDH) model. The assumption of initial exciton number n0=4 with n=2, p=2 and h=0 best satisfies the results measured in the present work. The model calculations were done using the ALICE/LIVERMORE-82 computer code. The pre-equilibrium fraction has also been calculated.

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Determination of radial and axial neutron flux distribution in irradiation channel of NIRR-1 using foil activation technique

Annals of Nuclear Energy ◽

10.1016/j.anucene.2012.07.014 ◽

2012 ◽

Vol 50 ◽

pp. 50-55 ◽

Cited By ~ 8

Author(s):

Y. Musa ◽

Y.A. Ahmed ◽

Y.A. Yamusa ◽

I.O.B. Ewa

Keyword(s):

Neutron Flux ◽

Flux Distribution ◽

Activation Technique ◽

Irradiation Channel ◽

Neutron Flux Distribution ◽

Foil Activation

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Article

Canadian Journal of Physics ◽

10.1139/p98-054 ◽

1998 ◽

Vol 76 (10) ◽

pp. 785-791

Author(s):

N L Singh ◽

D J Shah ◽

H B Patel

Keyword(s):

Hybrid Model ◽

Alpha Particle ◽

Gamma Ray ◽

Experimental Results ◽

Particle State ◽

Activation Technique ◽

Natural Iron ◽

Foil Activation ◽

Stacked Foil Activation Technique

The stacked-foil activation technique and HPGe gamma-ray spectroscopy were used for the investigation of alpha-particle-induced reactions on natural iron up to 50 MeV. Excitation functions for the production of reaction residues 57Ni, 56Ni, 58Co, 57Co, and 56Co from alpha-particle-induced reactions on 56Fe were measured with a view to improve the quality of earlier measurements. The experimental results were compared with calculations considering equilibrium as well as preequilibrium reactions according to hybrid model of Blann (ALICE/90). It was found that the initial exciton configuration n0= 4(2p + 2n + 0h ) i.e., pure particle state appears to give a good fit to the experimental data.PACS No.: 25.60

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