Cross sections of electron excitation of atomic nuclei in plasmaстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:Within the frameworks of the nonrelativistic plane wave Born approximation (PWBA), the analytical formulas for cross sections of E1–E3 and M1–M2 excitation of nuclei to the low-energy isomeric state as a result of inelastic scattering of nonrelativistic electrons are derived in the present work. The PWBA cross section of E1 excitation of isomer 181mTa (9/2−, 6.237 keV) by electrons appeared to be two orders less than that one used in a number of works for calculation of isomeric nuclei yield under exposure of 181Ta-target hot dense laser plasma. To test the PWBA method we have calculated excitation cross sections of the nuclei 181Ta, 110Ag, 169Tm, and 201Hg in a relativistic version of the Hartree-Fock-Slater method. It was established that the PWBA method overestimates E1 cross sections and underestimates E2 and M1 cross sections.