Cross section measurements via residual nuclear decays: Analysis methods

Journal Article · Sun Nov 15 00:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.054615· OSTI ID:21296509

Fengqun, Zhou; Lei, Gao; Kuohu, Li; Yueli, Song; Fang, Zhang ^[1]; Xiangzhong, Kong ^[2]; Junhua, Luo ^[3]

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1. Electric and Information Engineering College, Pingdingshan University, Pingdingshan, Henan Province 467000 (China)
2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730000 (China)
3. Department of Physics, Hexi University, Zhangye, Gansu Province 734000 (China)

We develop an approach to calculating the pure cross section of the ground state of artificial radioactive nuclides that subtracts the effect of an excited state on the ground state. We apply a formalism to obtaining pure cross sections by subtracting the effect of excited states in the reactions {sup 122}Te(n,2n){sup 121}Te{sup g} and {sup 128}Te(n,2n){sup 127}Te{sup g}, induced by neutrons of about 14 MeV. The cross sections are measured by an activation relative to the {sup 93}Nb(n,2n){sup 92}Nb{sup m} reaction and are compared with results that take into account the effect of the excited state. Measurements are carried out by {gamma} detection using a coaxial high-purity germanium (HPGe) detector. As samples, spectroscopically pure Te powder is used. The fast neutrons are produced by the {sup 3}H(d,n){sup 4}He reaction. The neutron energies in these measurements are determined using the method of cross-section ratios between the {sup 90}Zr(n,2n){sup 89}Zr{sup m+g} and {sup 93}Nb(n,2n){sup 92}Nb{sup m} reactions.

• OSTI ID: 21296509
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevC.80.054615; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPUTERIZED SIMULATION
CROSS SECTIONS
DETECTION
EXCITED STATES
FAST NEUTRONS
GROUND STATES
HELIUM 4
HIGH-PURITY GE DETECTORS
MEV RANGE 10-100
NEUTRON BEAMS
NEUTRON EMISSION
NEUTRON REACTIONS
NIOBIUM 93
NUCLEAR DECAY
TELLURIUM 121
TELLURIUM 122 TARGET
TELLURIUM 127
TELLURIUM 128 TARGET
TRITIUM
ZIRCONIUM 90