Repulsive four-body interactions of α particles and quasistable nuclear α -particle condensates in heavy self-conjugate nuclei
Repulsive four-body interactions of α particles and quasistable nuclear α -particle condensates in heavy self-conjugate nuclei
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DOI：
10.1103/physrevc.97.054301
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发表时间：
2018-04
影响因子：
3.1
通讯作者：
Dong Bai;Z. Ren
中科院分区：
文献类型：
--
作者：
Dong Bai;Z. Ren
We study the effects of repulsive four-body interactions of $\alpha$ particles on nuclear $\alpha$-particle condensates in heavy self-conjugate nuclei using a semi-analytic approach, and find that the repulsive four-body interactions could decrease the critical number of $\alpha$ particles, beyond which quasi-stable $\alpha$-particle condensate states can no longer exist, even if these four-body interactions make only tiny contributions to the total energy of the Hoyle-like state of $^{16}$O. Explicitly, we study eight benchmark parameter sets, and find that the critical number $N_\text{cr}$ decreases by $|\Delta N_\text{cr}|\sim1-4$ from $N_\text{cr}\sim11$ with vanishing four-body interactions. We also discuss the effects of four-body interactions on energies and radii of $\alpha$-particle condensates. Our study can be useful for future experiments to study $\alpha$-particle condensates in heavy self-conjugate nuclei. Also, the experimental determination of $N_\text{cr}$ will eventually help establish a better understanding on the $\alpha$-particle interactions, especially the four-body interactions.
