RELIABILITY OF Ta-181 PHOTODISINTEGRATION DATA OBTAINED USING VARIOUS METHODS

Authors & Affiliations

Varlamov V.V., Orlin V.N., Peskov N.N., Polevich T.S.
D. V. Skobeltsyn Institute of Nuclear Physics (SINP) of the Moscow State University, Russia

Abstract

Using data physical reliability objective absolute criteria the various methods investigations results of 181Ta photodisintegration were analysed. As criteria the special transitional functions Fiexp = σexp(γ,in)/σexp(γ,xn) that for various (i = 1, 2, 3, …) reactions must not have values more than 1.00, 0.50, 0.33 were used. That was shown that (γ,n), (γ,2n) and (γ,3n) reactions cross sections experimental data obtained using the multiplicity neutron sorting methods based on their kinetic energy measurement are not satisfy to absolute criteria and therefore are not physically reliable. In the frame of new experimentally-theoretical method free from neutron multiplicity problems using functions Fitheor = σtheor(γ,in)/σtheor(γ,xn) calculated in the frame of modern photonuclear reaction model new reliable data for partial reaction cross sections σeval (γ,in)=Fitheor·σexp(γ,xn) were evaluated. That was shown that evaluated data are in agreement with the results of 181Ta photodisintegration experiments carried out ising the method of induced activity. The possible reasons of neutron multiplicity from kinetic energy measurement information distortion are discussed.

Keywords
photodisintegration nucleus, function of multiplicity, sectional partial reactions, neutron multiplicity

Article Text (in Russian, PDF)

References

UDC 539.17

Problems of Atomic Science and Technology. Series: Nuclear Constants, issue 1-2, 2011-2012