On some problems in describing and employing radiative strength functions

Kamerdzhiev S. P.; Avdeenkov A. V.; Achakovskiy O. I.

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On some problems in describing and employing radiative strength functions

机译：关于描述和使用辐射强度函数的一些问题

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Problems that are associated with the description of radiative processes in low-energy physics for nuclear data and which can be solved within modern microscopic theory of the nucleus are discussed. This discussion concerns recent results in the theory of the pygmy dipole resonance and of the radiative strength function and the status of the Axel-Brink hypothesis. It is confirmed that coupling to phonon degrees of freedom must be taken into account in order to explain this resonance and the radiative strength function. By using the self-consistent generalized theory of finite Fermi systems, in which this coupling is taken into account, the pygmy dipole resonance is calculated for the Ni-68 and Sn-116 nuclei, and agreement with recent experimental data is obtained for the mean energy and for a 5% exhaustion of the sum rule for Ni-68. For the example of the Ni-68 and Sn-116 nuclei, the E1 radiative strength functions are calculated for the first time with allowance for coupling to phonons, and the microscopic cross sections for total E1 photoabsorption that were obtained within the self-consistent generalized theory of finite Fermi systems are employed in these calculations.

机译：讨论了与低能物理学中用于核数据的辐射过程的描述有关的问题，这些问题可以在现代原子核微观理论中解决。该讨论涉及侏儒偶极子共振和辐射强度函数理论的最新结果以及Axel-Brink假设的状态。已经证实，必须考虑耦合到声子自由度，以便解释这种共振和辐射强度函数。通过使用有限费米系统的自洽广义理论，其中考虑了这种耦合，可以计算出Ni-68和Sn-116原子的侏儒偶极子共振，并且均值与最近的实验数据一致能量和Ni-68求和规则的5％耗竭。对于Ni-68和Sn-116原子核的例子，首次计算了E1辐射强度函数，并考虑了与声子的耦合，并在自洽广义下获得了总E1光吸收的微观截面。这些计算采用有限费米系统的理论。

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《Physics of atomic nuclei》 |2014年第10期|共10页
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Kamerdzhiev S. P.; Avdeenkov A. V.; Achakovskiy O. I.;
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正文语种 eng
中图分类原子物理学;原子核物理学、高能物理学;
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On some problems in describing and employing radiative strength functions

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