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Influence of Pressure on the Shape of γ‐Lines Emitted by Sm‐Nuclei Recoiling with 3 eV in Eu‐Metal
Author(s) -
Kalus J.
Publication year - 1970
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19700390224
Subject(s) - recoil , atomic physics , line (geometry) , electron , physics , atom (system on chip) , metal , nuclear physics , materials science , computer science , embedded system , geometry , mathematics , metallurgy
The deceleration of the Sm 152 nuclei recoiling with an energy of 3 eV after the electron capture decay of Eu 152 , and thus the shapes of γ‐lines emitted after the neutrino emission, depends on the condition of the source material. The change of the γ‐line shape of a Eu‐metal source as a function of pressure was ascertained by measuring the yield of resonantly scattered 963 keV γ‐rays for pressures of 3.54 and 16.6 kbar. Features of the forces acting between the Sm‐atom and the Eu‐atoms are presented. In view of the low recoil‐energies involved and of the short lifetime of the nuclear state, the line shapes could be calculated to a good approximation by assuming that the recoiling nuclei were moving in a spherical potential [1, 2].