Direct proton decay and microscopic structure of the spin-dipole resonance in Bi-208
Direct proton decay and microscopic structure of the spin-dipole resonance in Bi-208
复制标题
Bi-208 中自旋偶极子共振的直接质子衰变和微观结构
DOI：
10.1103/physrevc.61.011304
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发表时间：
1999
影响因子：
3.1
通讯作者：
M. Yosoi
中科院分区：
文献类型：
--
作者：
H. Akimune;I. Daito;Y. Fujita;M. Fujiwara;M. Harakeh;J. Jänecke;M. Yosoi
本文研究了Pb-208（He-3，t）Bi-208反应中电子能量为21.1MeV的自旋偶极共振（SDR）的微观结构。由于SDR衰变而发射的质子在固态探测器中测量，与高分辨率磁谱仪Grand Raiden检测到的tritons一致。测量了Pb-207中质子从SDR衰变到剩余中子-空穴态的总分支比和部分分支比。导出的逃逸宽度与最近的理论估计吻合得很好。
The microscopic structure of the spin-dipole resonance (SDR) at E-x = 21.1 MeV in Bi-208 has been investigated in the Pb-208(He-3,t)Bi-208 reaction at E(He-3) = 450 MeV and very forward scattering angles. Protons emitted due to the decay of the SDR were measured in solid-state detectors in coincidence with tritons detected with the high resolution magnetic spectrometer Grand Raiden. The total and partial branching ratios for proton decay from the SDR to the residual neutron-hole states in Pb-207 have been measured. The deduced escape widths are found to be in good agreement with recent theoretical estimates.