Abstract

Processes involving the ionization of atomic shells and x-ray transitions in daughter nuclei and accompanying alpha decay of superheavy isotopes are considered. The probabilities for \(N\)-shell ionization during the decay of isotopes entering into the tennessine (\({}^{294}_{117}\)Ts) and oganesson (\({}^{294}_{118}\)Og) alpha-decay chains are calculated. The Dirac–Fock method is used, and all multipole transitions and alpha-particle tunneling through the atomic Coulomb barrier are taken into account. The results of these calculations are analyzed and are compared with the \(K\)-, \(L\)-, and \(M\)-shell ionization probabilities. The energies of the x-ray \(K_{\alpha_{1,2}}\) lines are calculated for superheavy elements appearing as products of alpha decay in the \({}_{117}^{294}\)Ts and \({}_{118}^{294}\)Og chains. The Breit interaction and higher order electrodynamic corrections are taken into account. It is found that the energy of the \(K_{\alpha_{1}}\) line of the meitnerium isotope \({}^{268}_{109}\)Mt agrees within 0.01 keV with the results of earlier calculations. This indicates that the line observed at the GSI laboratory (Darmstadt) at an energy that is higher than the respective theoretical value by 3.2 keV does not admit an identification with the \(K_{\alpha_{1}}\) line of \({}^{268}_{109}\)Mt.

中文翻译：

---

超重核的α衰变伴随的原子过程

摘要

考虑了涉及原子壳的电离和子核中的X射线跃迁以及伴随的超重同位素的α衰变的过程。同位素在进入Tennessine（\（{} ^ {294} _ {117} \） Ts和oganesson（\（{} ^ {294} _ { ）的衰变过程中\（N \）壳电离的概率118} \） Og）α衰变链被计算。使用狄拉克－福克方法，并考虑了所有多极跃迁和穿过原子库仑势垒的α粒子隧穿。分析这些计算的结果，并将其与\（K \） -，\（L \） -和\（M \）-壳电离概率进行比较。X射线的能量\（K _ {\ alpha_ {1,2}} \）行是针对在\（{} _ {117} ^ {294} \） Ts和\（{} _ { 118} ^ {294} \） Og链。考虑了Breit相互作用和高阶电动校正。发现中子同位素\（{} ^ {268} _ {109} \） Mt的\（K _ {\ alpha_ {1}} \）线的能量与早期计算的结果在0.01 keV之内。这表明在GSI实验室（达姆施塔特（Darmstadt））观察到的线的能量比各自的理论值高3.2 keV，这不承认\（K _ {\ alpha_ {1}} \）线\（（ {} ^ {268} _ {109} \）山