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Thiep T.D.,Institute of Physics | An T.T.,Institute of Physics | Cuong P.V.,Institute of Physics | Khai N.T.,Institute of Physics | And 3 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2011

We have determined the isomeric ratios in 120Te(γ, n) 119m,gTe, 122Te(γ, n) 121m,gTe, 128Te(γ, n) 127m,gTe and 130Te(γ, n) 129m,gTe photonuclear reactions of natural tellurium induced by bremsstrahlungs with end-point energies in the giant dipole resonance (GDR) region. The investigated samples were irradiated at electron accelerator Microtron MT-25 of the Flerov Laboratory of Nuclear Reaction, Joint Institute for Nuclear Research, Dubna, Russia. The gamma spectra of the samples irradiated were measured with spectroscopic system consisting of 8192 channel analyzer and high-energy resolution (180 keV at gamma ray 1,332 keV of 60Co) HP(Ge) semiconductor detector Canberra. The GENIE2000 (Canberra) computer program was used for data processing. The results were discussed and compared with those of other authors. © 2011 Akadémiai Kiadó, Budapest, Hungary.


Thiep T.D.,Institute of Physics | An T.T.,Institute of Physics | Khai N.T.,Institute of Physics | Vinh N.T.,Institute of Physics | And 5 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

The ratio of the probabilities of population of the isomeric and ground states, so called the isomeric ratio is closely connected to the angular momentum of the initial fission fragments that is dissipated at the later stages of gamma ray cascade. This ratio also provides important information on the nuclear level structure as well as the nuclear reaction mechanism involved. In this work, the isomeric ratio in fission fragment 135Xe from photofission of 233U induced by 23.5 MeV bremsstrahlung has been determined by the method that uses inert gaseous flow. The results have been discussed and compared with that of other authors. © Akadémiai Kiadó, Budapest, Hungary 2010.


Thiep T.D.,Institute of Physics | Cuong P.V.,Institute of Physics | Belov A.G.,Flavor Laboratory of Nuclear Reactions | An T.T.,Institute of Physics | And 3 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2012

We have determined the isomeric ratios in 74Se(c,n) 73m,gSe and 82Se(c,n) 81m,g Se photonuclear reactions of natural Selenium induced by bremsstrahlungs with end-point energies in the giant dipole resonance region. The investigated samples were irradiated at electron accelerator Microtron MT-25 of the Flerov Laboratory of Nuclear Reaction, Joint Institute for Nuclear Research, Dubna, Russia. The gamma spectra of the samples irradiated were measured with spectroscopic system consisting of 8,192 channel analyzer and high-energy resolution (180 keV at gamma ray 1,332 keV of 60Co) HP(Ge) semiconductor detector Canberra. The GENIE2000 (Canberra) computer program was used for data processing. The results were discussed and compared with those of other authors. © 2011 Akadémiai Kiadó, Budapest, Hungary.

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