Zobrazeno 1 - 10
of 29
pro vyhledávání: '"P.E. Spivak"'
Autor:
N. Titov, Vladimir M Lobashev, E.P. Kiev, N. Golubev, S.N. Balashov, A.A. Golubev, Yu.E. Kuznetsov, V. I. Parfenov, Yu.I. Zakharov, O. Kazachenko, P.E. Spivak, A.P. Solodukhin, A.I. Bleule, I.V. Sekachev, I.E. Yarykin, B.M. Ovchinnikov, E.V. Geraskin, A. I. Belesev
Publikováno v:
Physics Letters B. 350:263-272
The end-point region of the β-spectrum of tritium has been measured with an integral electrostatic spectrometer with adiabatic magnetic collimation and gaseous tritium source. The search for the neutrino rest mass has resulted in mν2 = − 22 ± 4.
Publikováno v:
Physics Letters B. 253:283-286
The renormalization of the axial-vector coupling constant λ = g A / g V , extracted from the neutron lifetime ( λ τ ) and from the neutron beta decay asymmetry ( λ c ) is considered carefully In the standard model of the electroweak interaction
Autor:
P.E. Spivak, V.M. Lobashev
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 240:305-310
A method is proposed for measuring the tritium beta spectrum in order to determine the electron antineutrino rest mass. This method includes an electrostatic integral spectrometer with adiabatic collimation. The use of a source in the form of atomic
Autor:
B.G. Erozolimsky, P.E. Spivak
Publikováno v:
Journal of Nuclear Energy (1954). 6:243-250
A method of standardizing a neutron source is put forward which involves the comparison, within a graphite stack, of the effect of the source with that of a sink created by introducing an absorber. The apparatus is described, and an account is given
Publikováno v:
Journal of Nuclear Energy (1954). 4:70-78
The behaviour of η for U 233 , U 235 and Pu 239 has been investigated in the epithermal energy region. For U 233 , η remains constant eneto energies of the order of 100 eV. The value for Pu 239 falls by 12% in passing from a thermal spectrum to a s
Autor:
I.E. Kutikov, G. A. Dorofeev, Y.P. Dobrynin, P.E. Spivak, B. G. Erozolimsky, V. N. Lavrenchik
Publikováno v:
Journal of Nuclear Energy (1954). 4:79-85
η has been measured for U 233 , U 235 and PUM in the energy range 30 to 900 keV. It is found to increase substantially with neutron energy in this region.
Autor:
I.E. Kutikov, V. N. Lavrenchik, G. A. Dorofeev, B. G. Erozolimsky, Yu. P. Dobrynin, P.E. Spivak
Publikováno v:
The Soviet Journal of Atomic Energy. 1:295-302
The variation of νeff for the isotopes U233, U235 and Pu239 is measured in the superthermal region of neutron energies. For U233 νeff remains constant up to an energy of the order of 100 ev. For Pu239 νeff drops by 12% on going from the thermal sp
Autor:
L.A. Mikaelian, P.E. Spivak
Publikováno v:
Nuclear Physics. 20:475-486
Ths longitudinal polarization of beta particles from p/sup 32/ In/sup 114/, Sm/sup 153/, Lu/sup 177/, Ho/sup 166/, and Au/sup 198/ nuclei was measured at an energy of 300 to 340 Mev by Mott scattering (transformation of the longitudinal polarization
Publikováno v:
Nuclear Physics. 23:169-172
Asymmetry values of double unpolarized electron scattering on gold are measured. Absolute values of the longitudinal polarization of β-electrons of P 32 , In 114 , Au 198 , Ho 166 , Lu 177 and Sm 153 are obtained on the basis of the data of this inv
Autor:
P.E. Spivak, Yu. P. Dobrynin, G. A. Dorofeev, I.E. Kutikov, B. G. Erozolimsky, V. N. Lavrenchik
Publikováno v:
The Soviet Journal of Atomic Energy. 1:303-309
Measurements are taken on νeff for the isotopes U233, U235 and Pu239 for neutrons with energies from 30 to 900 kev. It is discovered that in this energy region νeff increases substantially as the neutron energy increases.