Eur. Phys. J. A (2018) 54: 67
https://doi.org/10.1140/epja/i2018-12501-y

Regular Article - Experimental Physics

Activation cross section and isomeric cross section ratio for the ⁷⁶Ge(n,2n)^75m,gGe process

¹ Institute of New Energy, Hexi University, 734000, Zhangye, China
² School of Physics and Electromechanical Engineering, Hexi University, 734000, Zhangye, China
³ Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, 621900, Mianyang, China

^* e-mail: luojh71@163.com

Received: 3 December 2017
Accepted: 26 March 2018
Published online: 26 April 2018

Abstract

We measured neutron-induced reaction cross sections for the ⁷⁶Ge(n,2n)^75m,gGe reactions and their isomeric cross section ratios at three neutron energies between 13 and 15MeV by an activation and off-line -ray spectrometric technique using the K-400 Neutron Generator at the Chinese Academy of Engineering Physics (CAEP). Ge samples and Nb monitor foils were activated together to determine the reaction cross section and the incident neutron flux. The monoenergetic neutron beams were formed via the ³H(d,n)⁴He reaction. The pure cross section of the ground state was derived from the absolute cross section of the metastable state and the residual nuclear decay analysis. The cross sections were also calculated using the nuclear model code TALYS-1.8 with different level density options at neutron energies varying from the reaction threshold to 20MeV. Results are discussed and compared with the corresponding literature data.