Parity measurements of nuclear levels using a free-electron-laser generated gamma-ray beam.
Parity measurements of nuclear levels using a free-electron-laser generated gamma-ray beam.
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使用自由电子激光产生的伽马射线束对核水平进行宇称测量。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
H. Weller
中科院分区：
文献类型：
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作者：
N. Pietralla;N. Pietralla;Z. Berant;Z. Berant;Vladimir Litvinenko;S. Hartman;F. F. Mikhailov;I. Pinayev;G. Swift;M. Ahmed;J. Kelley;S. Nelson;R. Prior;K. Sabourov;A. Tonchev;H. Weller
高强度伽马射线源的伽马射线的质量和强度表明，使核共振荧光研究可能在一个新的水平的精度和效率。第一个实验是用一束100%线偏振的、近单能的强（10（7）γ/s）γ射线照射半象核（138）Ba。负宇称量子数已被分配给18偶极激发（138）Ba之间的5.5 MeV和6.5 MeV的方位角γ强度不对称。
The quality and intensity of gamma rays at the High Intensity gamma-ray Source are shown to make nuclear resonance fluorescence studies possible at a new level of precision and efficiency. First experiments have been carried out using an intense (10(7) gamma/s) beam of 100% linearly polarized, nearly monoenergetic, gamma rays on the semimagic nucleus (138)Ba. Negative parity quantum numbers have been assigned to 18 dipole excitations of (138)Ba between 5.5 MeV and 6.5 MeV from azimuthal gamma-intensity asymmetries.