Ytterbium (γ, n) average cross-sections data near to photodisintegration reaction threshold

被引：0

作者：

Vagena, E. ^{[1
]}

Stoulos, S. ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki AUTH, Sch Phys, Nucl Phys Lab, Thessaloniki, Greece

来源：

EUROPEAN PHYSICAL JOURNAL A | 2018年 / 54卷 / 09期

关键词：

GIANT-DIPOLE RESONANCE; REGION; LINAC;

D O I：

10.1140/epja/i2018-12583-5

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The thick foils activation technique has been applied to estimate the average cross-sections of Yb-168,Yb-170,Yb-176 (gamma, n) reaction near to photodisintegration threshold. The (gamma, n) cross-sections are derived using the integrated photon flux at any energy range from the reaction threshold to the bremsstrahlung end-point energy. The photon flux is estimated using a calibration photodisintegration set of foils and taking in advance the spectrum linearity at high energies. The p-nuclei Yb-168 average cross-section is 106 +/- 21 mb corresponding to E-mean = 10 MeV. The Yb-170 average cross section is 117 +/- 31 mb matching E-mean = 9 MeV while the Yb-176 one is 123 +/- 36 mb corresponding to E-mean = 8 MeV. The experimental results associate to statistical model simulations performed by the TALYS code. The simulated data of Yb-168 ranges 83-139 mb, while Yb-170 and Yb-176 vary between 89-152 and 84-170 mb; which agree with the measurements within uncertainties. The simulated average cross-section of Yb-mat (gamma, n) reaction is 127 +/- 25 mb corresponding to energy ranges 6.6-14 MeV. The simulation results based on Lorentzian gamma-strength considerations with the density level of Fermi gas plus the constant temperature model are closest to the average cross-sections measured.

引用

页数：7

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