Investigation of cluster structure of light nuclei H, He and Li isotopes, in three-body final states photodisintegration processes in the energy range 50-250 MeV using photon beams of Yerevan Synchrotron

Study of cluster structures of excited states for the light nuclei He, Li and Be in three-body photodisintegration processes. Application for the excited states of the 6He* nucleus

The method used to investigate the cluster structures of excited states for the light nuclei He, Li and Be in three-body photodisintegration processes is described. As an application we present the experimental program on the Yerevan synchrotron for the photodisintegration of 7Li target, the production and decay of the 6He isotope and the study of the two-cluster (tritons) structures of excited states. In particular, the properties of the detectors used in the setup, as well as the precision and simulation of the measured values are presented.

Study of the light nuclei cluster structures in three-body photodisintegration reactions. Application for the excited states of 6He nucleus

An experimental program for the study of the cluster structures of excited states for the light nuclei of He, Li and Be in three-body photodisintegration processes is proposed. The investigations will be realized with 6Li, 7Li and 9Be targets in seven photodisintegration reactions. As an application, the photodisintegration of 7Li nuclei into the (t+t+p) final state with excitation and decay of neutron-rich 6He nucleus into the (t+t) channel is considered. The full Monte-Carlo simulation of the experiment is done with a special impact on the study of experimental setup performance, concerning …

Photodisintegration studies on p-nuclei: The case of Mo and Sm isotopes

In explosive stellar environments like supernovae, the temperatures are high enough for the production of heavy neutron-deficient nuclei, the socalled p-nuclei. Up to now, the knowledge of the reaction rates of p-nuclei is based on theoretical parameterizations using statistical model calculations. At the bremsstrahlung facility of the superconducting electron accelerator ELBE of FZ Dresden-Rossendorf, we aim to measure the photodisintegration rates of heavy nuclei experimentally. Photoactivation measurements on the astrophysically relevant p-nuclei 92Mo and 144Sm have been performed with brem…

Low-energy photodisintegration of 9Be and alpha + alpha + n <-> 9Be + gamma reactions at astrophysical conditions

A semi-microscopic model for the low-energy photodisintegration of the 9Be nucleus is constructed, and the experimental data are analyzed with its help. The older radioactive isotope data are supported by this analysis. The theoretical photodisintegration cross section is derived. The astrophysical rates for the reaction alpha + alpha + n -> 9Be + gamma and the reverse photodisintegration of 9Be are calculated. The new reaction rate for alpha + alpha + n -> 9Be + gamma is compared with previous estimations.

$^{173}$Hf 的精密质量测量：用于 $^{173}$Lu 核结构及 $\gamma$ 过程研究

Precision mass measurement of $^{173}$Hf for nuclear structure of $^{173}$Lu and the $γ$ process

利用 JYFLTRAP 双潘宁阱质谱仪精密测量 $^{173}$Hf 质量，精度提高九倍，排除 $^{173}$Lu 激发态跃迁，并约束 $\gamma$ 过程中 $^{174}$Hf 光致蜕变反应速率。

(n,$γ$) Cross Sections of Light p Nuclei -- Towards an Updated Database for the p Process

The nucleosynthesis of elements beyond iron is dominated by the s and r processes. However, a small amount of stable isotopes on the proton-rich side cannot be made by neutron capture and are thought to be produced by photodisintegration reactions on existing seed nuclei in the so-called "p process". So far most of the p-process reactions are not yet accessible by experimental techniques and have to be inferred from statistical Hauser-Feshbach model calculations. The parametrization of these models has to be constrained by measurements on stable proton-rich nuclei. A series of (n,$γ$) activati…