ISSN:
1573-8205
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Physics
Notes:
Abstract Resonance scattering of γ-rays With energies Eγ1=1.38 Mev, corresponding to the transition to the ground state in Mg24. have been observed in metallic magnesium. The energy given off by the γ-ray (Eγ1=1.38 Mev) in emission and collision with the nucleus, is compensated for by the energy obtained due to recoil associated with the emission of the preceding γ-ray with an energy Eγ2 = 2.76 Mev. Using a fast coincidence method and amplitude discrimination, coincidences were recorded between the γ-rays with energies Eγ1=1.38 Mev and Eγ2=2.76 Mev. Scattercrs of magnesium and aluminum were alternately placed in the path of the 1.38 Mev γ-rays. The source was radioactive Na24 in a water solution of NaOH. At an angle of 120 ° between the γ-rays a strong attenuatlon of the 1.38 Mev γ-rays was observed; this is attributed to resonance scattering. When the angle between the γ-rays was varied by 5 °. the strong attenuation of the flux disappeared. The width of the level at 1.38 Mev in Mg24 has been estimated at Γ 〉 1.6· in−4 Mev.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01514534
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