【摘要】：基于蘭州量子分子動力學(LQMD)模型,系統(tǒng)研究了低能反質(zhì)子引起的核反應中原子核碎裂機制和粒子產(chǎn)生。在LQMD輸運模型中,考慮了反重子-重子、重子-重子和介子-重子碰撞可能產(chǎn)生的彈性散射、湮滅反應、電荷交換和非彈性散射。發(fā)展了并合模型,用于相空間構造初級碎片產(chǎn)生。處于激發(fā)態(tài)的碎片退激是基于統(tǒng)計模型描述。研究結果說明超子主要是由于奇異性交換產(chǎn)生;重碎片裂變會導致中等質(zhì)量區(qū)域碎片產(chǎn)額增加;反質(zhì)子引起的核反應有利于產(chǎn)生s=-2和s=1奇特超核,并給出了產(chǎn)生截面。
[Abstract]:Based on Lanzhou quantum molecular dynamics (LQMD) model, the nuclear fragmentation mechanism and particle generation in low energy antiproton induced nuclear reactions were systematically studied. In the LQMD transport model, the potential elastic scattering, annihilation reaction, charge exchange and inelastic scattering of antibaryon-baryons, baryons and meson-baryons are considered. A hybrid model is developed for the generation of primary fragments in phase space structures. The deexcitation of fragments in the excited state is based on the statistical model description. The results show that the hyperons are mainly due to singularity exchange, the fission of heavy fragments will lead to the increase of fragment yield in the middle mass region, and the nuclear reaction induced by antiprotons will be conducive to the production of the peculiar supernuclei sn-2 and sl1, and the generation cross sections are given.
【作者單位】： 中國科學院近代物理研究所;
【基金】：National Natural Science Foundation of China(11675226,11175218) National Basic Research Program of China(973 Program)(2015CB856903) Youth Innovation Promotion Association of Chinese Academy of Sciences~~
【分類號】：O571

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