Yields and cross sections of the 241Am(γ, n)240mfAm and 243Am(γ, n)242mf-Am reactions in the E1 giant resonance region

The ratio of delayed to prompt fission yields has been measured for ²⁴¹Am and ²⁴³Am samples irradiated by a bremsstrahlung photon pulsed beam over the energy range E_γmax = 10–80 MeV. The relative probabilities of ^240mfAm and ^242mfAm isomer production and the cross sections of the ²⁴¹Am(γ, n)^240mfAm and ^243Am(γ, n)^242mfAm reactions were deduced from the yields measured in the E1 giant resonance region.     

Synchrotron radiation of an electron moving along a helix

The familiar equations for the synchrotron radiation of an electron moving in a constant and uniform magnetic field are refined and corrected for the case of a helical trajectory. Particular attention is paid to account of the subsequent approximations in the asymptotic equation. This permits a significant expansion of the range of applicability of the approximate methods for studying the synchrotron radiation when there is a longitudinal velocity component.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, Vol. 12, No. 2, pp. 108–116, February, 1969.The authors thank Professor I. M. Ternov and V. G. Bagrov for discussion of these results.     

Condensation of aminoferrocene with nitrosobenzene

Summary Phenylazoferrocene and phenylazoxyferrocene were synthesized by the condensation of aminoferrocene with nitrosobenzene in the presence of sodium hydroxide.