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071 6 0 _a10.1023/B:RUPJ.0000015245.32302.e5
090 _a639365
100 _a20150305a2003 k y0engy50 ba
101 0 _aeng
102 _aRU
135 _adrcn ---uucaa
181 0 _ai
182 0 _ab
200 1 _aExperimental Limit on the Probability of Neutral Pion Emission in Neutron-Induced Fission of 235U Nuclei
_fV. A. Tryasuchev
203 _aText
_celectronic
300 _aTitle screen
320 _a[References: p. 882 (19 tit.)]
330 _aResults of an experiment on the search for the emission of π0 mesons in neutron-induced fission of235U nuclei based on the detection in coincidence of two γ-quanta from the π0-meson decay performed with the nuclear reactor developed at the Scientific-Research Nuclear Physics Institute at Tomsk Polytechnic University are described. The experimental setup comprised two Čerenkov spectrometers of total absorption for the detection and measurement of γ-quantum energy placed in two coaxial horizontal channels of the nuclear reactor. Water filters placed in the channels were used to protect the detectors from β-, γ-, and neutron fluxes. To reject the cosmic radiation, scintillation counters of large area, operating in anticoincidence mode, were placed above each spectrometer. The experimentally measured limitation on the probability of neutral pion emission in neutron-induced fission of nuclei was established ≤4.1·10-11 with a 90% confidence level. The energy spectrum of γ-quanta from the active reactor zone was measured in the range 32-65 MeV. The parameters of the spectrum deviated from the results of theoretical calculations and from the experiment performed with the nuclear pulse reactor developed at the Joint Institute for Nuclear Research (Dubna).
333 _aРежим доступа: по договору с организацией-держателем ресурса
461 _tRussian Physics Journal
463 _tVol. 46, iss. 9
_v[P. 874-882]
_d2003
610 1 _aэлектронный ресурс
610 1 _aтруды учёных ТПУ
700 1 _aTryasuchev
_bV. A.
_cphysicist
_cProfessor of Tomsk Polytechnic University, doctor of physico-mathematical Sciences
_f1947-
_gVladimir Andreevich
_2stltpush
_3(RuTPU)RU\TPU\pers\33804
801 2 _aRU
_b63413507
_c20150305
_gRCR
856 4 _uhttp://link.springer.com/article/10.1023%2FB%3ARUPJ.0000015245.32302.e5
942 _cCF