102 research outputs found
Bremsstrahlung in alpha-Decay Reexamined
A high-statistics measurement of bremsstrahlung emitted in the alpha decay of
210Po has been performed, which allows to follow the photon spectra up to
energies of ~ 500 keV. The measured differential emission probability is in
good agreement with our theoretical results obtained within the quasi classical
approximation as well as with the exact quantum mechanical calculation. It is
shown that due to the small effective electric dipole charge of the radiating
system a significant interference between the electric dipole and quadrupole
contributions occurs, which is altering substantially the angular correlation
between the alpha particle and the emitted photon.Comment: 10 pages, 5 figures, v2: fix of small typo
Bremsstrahlung in α decay reexamined
A high-statistics measurement of bremsstrahlung emitted in the α decay of 210Po has been performed, which allows us to follow the photon spectra up to energies of ~500keV. The measured differential emission probability is in good agreement with our theoretical results obtained within the quasiclassical approximation as well as with the exact quantum mechanical calculation. It is shown that, due to the small effective electric dipole charge of the radiating system, a significant interference between the electric dipole and quadrupole contributions occurs, which is altering substantially the angular correlation between the α particle and the emitted photon
Quasiclassical description of bremsstrahlung accompanying α decay including quadrupole radiation
We present a quasiclassical theory of alpha decay accompanied by
bremsstrahlung with a special emphasis on the case of 210Po, with the aim of
finding a unified description that incorporates both the radiation during the
tunneling through the Coulomb wall and the finite energy E_gamma of the
radiated photon up to E_gamma on the order of Q_alpha/sqrt(eta), where Q_alpha
is the alpha-decay Q-value and eta is the Sommerfeld parameter. The corrections
with respect to previous quasiclassical investigations are found to be
substantial, and excellent agreement with a full quantum mechanical treatment
is achieved. Furthermore, we find that a dipole-quadrupole interference
significantly changes the alpha-gamma angular correlation. We obtain good
agreement between our theoretical predictions and experimental results.Comment: 8 pages, 4 figure
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