N. Bree, I. Stefanescu, P. A. Butler, J. Cederkäll, T. Davinson, P. Delahaye, J. Eberth, D. Fedorov, V. N. Fedosseev, L. M. Fraile, S. Franchoo, G. Georgiev, K.… 展开作者
N. Bree, I. Stefanescu, P. A. Butler, J. Cederkäll, T. Davinson, P. Delahaye, J. Eberth, D. Fedorov, V. N. Fedosseev, L. M. Fraile, S. Franchoo, G. Georgiev, K. Gladnishki, M. Huyse, O. Ivanov, J. Iwanicki, J. Jolie, U. Köster, Th. Kröll, R. Krücken, B. A. Marsh, O. Niedermaier, P. Reiter, H. Scheit, D. Schwalm, T. Sieber, J. Van de Walle, P. Van Duppen, N. Warr, D. Weisshaar, F. Wenander, S. Zemlyanoy
在安全能量下用库仑激发法测量了$^{68}$ Ni中的$B(E2;0^+\to2^+)$值。$^{68}$ Ni放射性核束在ISOLDE设施(CERN)后加速到2.9 MeV/u。发射的$γ$射线由MINIBALL检测器阵列检测。进行运动学粒子重建以增加测量的c.m.。激励截面的角度范围。所获得的2.8 $^{+1.2}_{-1.0}$ 10 $^2$ e $^2$ fm $^4$的值与在中能库仑激发下测量的值非常一致,证实了低的$0^+\to2^+$跃迁概率。
英文摘要:
The $B(E2;0^+\to2^+)$ value in $^{68}$Ni has been measured using Coulomb excitation at safe energies. The $^{68}$Ni radioactive beam was post-accelerated at the ISOLDE facility (CERN) to 2.9 MeV/u. The emitted $γ$ rays were detected by the MINIBALL detector array. A kinematic particle reconstruction was performed in order to increase the measured c.m. angular range of the excitation cross section. The obtained value of 2.8$^{+1.2}_{-1.0}$ 10$^2$ e$^2$fm$^4$ is in good agreement with the value measured at intermediate energy Coulomb excitation, confirming the low $0^+\to2^+$ transition probability.
Study of 9Be+12C elastic scattering at energies near the Coulomb barrier
在这项工作中,角分布测量的弹性通道进行了9 Be +12 C反应在能量ELab=13.0,14.5,17.3,19.0和21.0 MeV,附近的库仑势垒。的数据进行了分析的框架内的双重折叠圣保罗潜力。实验的弹性散射角分布很好地描述了在所有测量的能量的前向角的光学势。然而,对于三个最高的能量,观察到增强的中间和向后的角度。这可以用弹性转移机制来解释。关键词:9 Be +12 C,弹性散射,圣保罗势。
Multi-pronged events from Coulomb fission of nuclei at very low energies
用$^{252}$ Cf裂变源在聚对苯二甲酸乙二酯($_{10}$ H $_8$ O $_4$)$_n$固体核径迹探测器上记录了多分叉径迹。在化学腐蚀后,在光学显微镜下观察到两叉到六叉的径迹以及单径迹。我们进行了系统的研究,以了解叉的起源。径迹探测器涂有金属(Cu、Ag和Pb)并暴露于$^{252}$ Cf源。在化学蚀刻后,在每个板中观察到两叉至四叉的轨迹。我们相信,在1 MeV/A量级的极低能量下,库仑裂变是这种多管齐下的轨道起源的唯一合理解释。
Coupled-channels description of multinucleon transfer and fusion reactions at energies near and far below the Coulomb barrier
我们研究重离子多核子转移反应使用耦合通道形式主义。我们首先使用半经典近似,并表明入口和对传输通道之间的直接耦合,提高了适合的实验一个和两个中子转移截面的40 Ca +96 Zr和60 Ni +116 Sn系统。然后,我们讨论的微扰方法的有效性,并突出高阶项的效果。吸收的影响也研究了库仑势垒周围的能量。最后,我们使用量子耦合通道的方法来实现的融合截面和转移概率的40 Ca +96 Zr反应的同时描述。我们发现,集体激发态的耦合对库仑势垒附近的转移几率有显著的影响。
Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The $^{16}$O+$^{154}$Sm reaction
Dynamical Coulomb effects on charged-pion HBT-radius splitting in central Au+Au collisions at few-GeV energies
School of Science, Huzhou Normal University(湖州师范学院理学院);Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research(联合核研究所玻戈留博夫理论物理实验室)