Measurement of the 24Mg(p, t)22Mg reaction for the states near the 21Na + p threshold
Measurement of the 24Mg(p, t)22Mg reaction for the states near the 21Na + p threshold
复制标题
DOI：
10.1140/epja/i2002-10024-x
复制
发表时间：
2002-08
期刊：
影响因子：
--
通讯作者：
S. Michimasa;S. Kubono;S. Park;T. Teranishi;Y. Yanagisawa;N. Imai;Z. Fülöp;X. Liu;T. Minemura-T.-Mi
中科院分区：
文献类型：
--
作者：
S. Michimasa;S. Kubono;S. Park;T. Teranishi;Y. Yanagisawa;N. Imai;Z. Fülöp;X. Liu;T. Minemura-T.-Mi
对于接近 22 Mg 中 5.502 MeV 质子阈值的状态，在 34.68 MeV 处测量了 24 Mg(p, t) 22 Mg 反应的微分截面。其中，先前报道的5.962、6.046、6.246和6.323 MeV的新态已得到证实。通过扭曲波玻恩近似计算来分析这些状态的角分布，以推导出自旋和宇称。 5.714 MeV 态的角分布被认为对恒星反应 21Na(p, γ)22Mg 最为关键，已被发现与 Jπ= 2+ 赋值一致。 6.046MeV状态被新指定为haveJπ=0+，5.962MeV状态被暂时指定为haveJπ=(1-)。这两种状态也将对新星中22Mg的产生发挥重要作用。
Differential cross-sections of the24Mg(p, t)22Mg reaction were measured at 34.68 MeV for the states near the proton threshold at 5.502 MeV in22Mg. Among them, the new states at 5.962, 6.046, 6.246 and 6.323 MeV, which were reported previously, have been confirmed. Angular distributions for these states were analyzed by distorted-wave Born-approximation calculations to deduce the spins and parities. The angular distribution for the 5.714 MeV state, which is considered to be most crucial for the stellar reaction21Na(p, γ)22Mg, has been found to be consistent withJπ= 2+assignment. The 6.046 MeV state is newly assigned to haveJπ= 0+, and the 5.962 MeV state is tentatively assigned to haveJπ= (1-). These two states will also play an important role for22Mg production in novae.