Production cross section of At radionuclides from 7 Li + nat Pb and 9 Be + nat Tl reactions
Production cross section of At radionuclides from 7 Li + nat Pb and 9 Be + nat Tl reactions
复制标题
7 Li nat Pb 和 9 Be na Tl 反应中 At 放射性核素的生产截面
DOI：
10.1103/physrevc.84.067601
复制
发表时间：
2011
影响因子：
3.1
通讯作者：
Susanta Lahiri
中科院分区：
文献类型：
--
作者：
M. Maiti;Susanta Lahiri
早先我们报道了${}^{6,7}$Li-和${}^{9}$ be分别在天然铅和铊靶上诱导反应可能产生砹放射性核素的理论研究。用两个重离子诱导反应${}^{9}$Be $+$ ${}^{\mathrm{nat}}$Tl和${}^{7}$Li $+$ ${}^{\mathrm{nat}}$Pb实验研究了砹放射性核素的生成。在（HI,$xn$）通道中产生的蒸发残留物${}^{207,208,209,210}$At的形成截面采用叠片技术，然后在低入射能量（$ 1 $50 MeV）下使用离线$\ensuremath{\gamma}$光谱法测量。用Weisskopf-Ewing和Hauser-Feshbach模型解释了测量的激发函数的复合核反应机制。实测截面值低于各自的理论预测值。
Earlier we reported theoretical studies on the probable production of astatine radionuclides from ${}^{6,7}$Li- and ${}^{9}$Be-induced reactions on natural lead and thallium targets, respectively. The production of astatine radionuclides were investigated experimentally with two heavy-ion-induced reactions: ${}^{9}$Be $+$ ${}^{\mathrm{nat}}$Tl and ${}^{7}$Li $+$ ${}^{\mathrm{nat}}$Pb. Formation cross sections of the evaporation residues, ${}^{207,208,209,210}$At, produced in the (HI,$xn$) channel, were measured by the stacked-foil technique followed by off-line $\ensuremath{\gamma}$ spectrometry at low incident energies ($l$50 MeV). Measured excitation functions were interpreted in terms of a compound nuclear reaction mechanism using Weisskopf-Ewing and Hauser-Feshbach models. Measured cross-section values are lower than the respective theoretical predictions.