## 留言板

2021, (1): 1-2.

2021, 38(1): 1-7.   doi: 10.11804/NuclPhysRev.38.2020065

The network calculation of 26Al nucleosynthesis in 3$M_{\odot}$ AGB stars and the sensitivity analysis of nuclear reaction rates have been investigated in this article. After establishing a complete nuclear reaction network from carbon to silicon, combined with the latest nuclear reaction rate data, we have calculated the abundance of 26Al. The results show that 26Al is effectively synthesized in the AGB stars at the beginning, but as the reaction proceeding, 26Al is consumed by a series of nuclear reactions. The MgAl cycle appears in the network of 26Al. We divide the main nuclear reactions in the reaction network into three categories (n, ${{\gamma }}$), (p, ${{\gamma }}$) and ($\alpha,\,{{\gamma }}$), and the sensitivity of nuclear reaction rates has been analyzed in detail. We have identified the most influential reactions in each type of nuclear reactions, they are: 25Mg(n, ${{\gamma }}$)26Mg, 25Mg(p, ${{\gamma }}$)26Al, 26Mg(p, ${{\gamma }}$)27Al, 21Ne(p, ${{\gamma }}$)22Na, 18O($\alpha,\,{\rm{\gamma }}$)22Ne and 22Ne($\alpha,\,{\rm{\gamma }}$)26Mg. Among all the nuclear reactions involved in the present network, 25Mg(p, ${\rm{\gamma }}$)26Al is the one that has the greatest impact on the yield of 26Al, which deserves the attention of nuclear experimentalists.

2021, 38(1): 8-16.   doi: 10.11804/NuclPhysRev.38.2020057

2021, 38(1): 17-23.   doi: 10.11804/NuclPhysRev.38.2020076

2021, 38(1): 24-29.   doi: 10.11804/NuclPhysRev.38.2020056

2021, 38(1): 30-37.   doi: 10.11804/NuclPhysRev.38.2020055

To characterize the phase space distribution of the beam in C-ADS demo linac, beam parameters need to be measured with high accuracy at the exit of RFQ. Transverse information of the beam has been measured via the method of emittance reconstruction and the beam optics has been verified. A method has been adopted to measure beam longitudinal parameters by the SUM-signal of beam position monitors. The bunching voltage of the two bunchers and the SUM-signals in the downstream BPMs are recorded in the experiment. By combining the PSO(Particle Swarm Optimization) method with TraceWin simulation, the results are obtained with the consideration of space charge effect. The measured emittance is quite close to the simulated one in Toutatis.

2021, 38(1): 38-44.   doi: 10.11804/NuclPhysRev.38.2020046

2021, 38(1): 45-51.   doi: 10.11804/NuclPhysRev.38.2020042

2021, 38(1): 52-60.   doi: 10.11804/NuclPhysRev.38.2020043

2021, 38(1): 61-65.   doi: 10.11804/NuclPhysRev.38.2020049

2021, 38(1): 66-72.   doi: 10.11804/NuclPhysRev.38.2020048

2021, 38(1): 73-79.   doi: 10.11804/NuclPhysRev.38.2020041

2021, 38(1): 80-88.   doi: 10.11804/NuclPhysRev.38.2020051

2021, 38(1): 89-94.   doi: 10.11804/NuclPhysRev.38.2020036

2021, 38(1): 95-101.   doi: 10.11804/NuclPhysRev.38.2020050

2021, 38(1): 102-106.   doi: 10.11804/NuclPhysRev.37.2020002

2021, 38(1): 107-115.   doi: 10.11804/NuclPhysRev.38.2020040