Activation cross sections of Sn isotopes for 14 MeV neutrons

doi:10.1016/0375-9474(68)90254-6

Nuclear Physics A

Volume 119, Issue 3, 4 November 1968, Pages 517-524

https://doi.org/10.1016/0375-9474(68)90254-6 Get rights and content

Abstract

The cross sections for (n, 2n) and (n, p) reactions have been measured for several tin isotopes by the activation method and compared with compound-nucleus theory. Fairly good agreement between the measured (n, 2n) cross sections and the predictions of the statiscal model was obtained, while disagreement between experiment and theory for the (n, p) reaction is interpreted as caused by the presence of direct processes. The cross sections for (n, p) reactions show a decreasing trend with increasing neutron number. The ratio σ_m/σ_g was measured for transitions to several isomeric states in (n, p) reactions.

References (13)

D.G. Gardner
Nucl. Phys.
(1962)
D.G. Gardner et al.
Nucl. Phys.
(1967)
J.N. Levkovskii
ZhETF (USSR)
(1963)
L.A. Rayburn
Phys. Rev.
(1961)
G.P. Chursin et al.
ZhETF (USSR)
(1963)
A.P. Klyucharev et al.
ZhETF (USSR)
(1964)

There are more references available in the full text version of this article.

Cited by (17)

Compilation of isomeric ratios of light particle induced nuclear reactions
2023, Atomic Data and Nuclear Data Tables
Experimental isomeric ratios of light (A $\leq$ 4) particle-induced nuclear reactions were compiled for the product nuclides having metastable states with half-lives longer than 0.1 s. The experimental isomeric ratio data were taken from the EXFOR library and reviewed. When an experiment reports isomer production cross sections instead of isomeric ratios, the cross sections taken from the EXFOR library were converted to the isomeric ratios by us. During compilation, questionable data (e.g., preliminary data compiled in EXFOR in parallel with their final data, sum of isomer production cross sections larger than the total production cross sections) were excluded. As an application of the new compilation, goodness-of-fit was studied for the isomeric ratios predicted by the reaction model code TALYS-1.96. A text file and plots of the compiled isomer production cross sections and isomeric ratios are provided as supplemental materials.
Activation cross sections for 13.6 MeV neutron induced reactions on natural tin
2022, Applied Radiation and Isotopes
Cross sections of the ¹¹²Sn(n,x)¹¹¹In, ¹¹⁴Sn(n,2n)¹¹³Sn, ^natSn(n,x)^117mSn and ¹²⁴Sn(n,2n)^123gSn reactions have been measured by using the activation technique at 13.6 MeV neutron energy. The neutrons were produced via the ³H(d,n)⁴He reaction. The present experimental data illustrated satisfactory agreement with most of the available literature data. Experimental data are compared with the corresponding evaluated nuclear data from the ENDF/B-VIII.0, JENDL-4.0/HE, BROND-3.1, CENDL-3.2 and JEFF-3.3 libraries, and the agreement are generally acceptable. Besides, different nuclear level density models have been used for the estimation of the desired excitation functions with TALYS-1.95 code.
Investigation of (n, p), (n, 2n) reaction cross sections for Sn isotopes for fusion reactor applications
2018, Applied Radiation and Isotopes
The compound Nb₃Sn possess superconductivity at suitable temperatures, therefore, it is best suited to be used in the toroidal coils of superconducting magnets which holds the fusion plasma and confine it inside the reactor core. The neutron induced reaction cross-sections are required from threshold to 20 MeV for different isotopes of Tin (Sn). Since limited data is available for the reactions with the Sn isotopes. Therefore, we have optimized the (n, p) and (n, 2 n) reaction cross-sections for all possible Sn isotopes from threshold to 20 MeV with modified input parameters in the nuclear reaction modular codes EMPIRE-3.2.2 and TALYS-1.8. These codes account for the major nuclear reaction mechanisms, including direct, pre-equilibrium, and compound nucleus contributions. The present results from $^{116} Sn {(n, p)}^{116 m} In$ , $^{117} Sn {(n, p)}^{117} In$ , $^{117} Sn {(n, p)}^{117 m} In$ , $^{118} Sn {(n, 2 n)}^{117 m} Sn,^{120} Sn {(n, 2 n)}^{119 m} Sn$ and $^{124} Sn {(n, 2 n)}^{123 m} Sn$ reactions calculated with nuclear modular codes: TALYS – 1.8, EMPIRE – 3.2.2 were compared with EXFOR data, systematics proposed by several authors and with the existing evaluated nuclear data library ENDF/B-VII.1, as well. The results from the present study can be used for the future development of ITER devices as well as to upgrade the nuclear model codes.
The experimental isomeric cross-section ratio in the nuclear activation technique
1981, Nuclear Instruments and Methods
First, the experimental isomeric cross-section ratio is discussed considering a single metastable state induced. The experimental ratio is given in a straightforward and exact formula, which is generally applicable to any incident particle activation and to any isomeric pair of an exclusive, fractional or non-existing isomeric transition decay.
Second, the derived experimental isomeric yield ration is adapted for the present work where neutron induced reactions are considered and gamma-ray spectrometry is utilized in the determination of the 14–15 MeV neutron activation cross-sections and isomeric cross-section ratios for the germanium reactions, ⁷⁴Ge(n, α) ^71m,gZn and ⁷⁶Ge(n, 2n) ^75m,gGe, leading to single metastable and ground states in the product.
Measurement of (n, p) cross sections on isotopes of Cd, Sn and Te for 14 MeV neutrons
1974, Nuclear Physics, Section A
For several isotopes of Cd, Sn and Te, cross sections for the (n, p) process have been measured by activation relative to ²⁷Al(n, α)²⁴Na. As target materials, natural Cd, Sn and TeO₂ of high purity have been used. Measurements were carried out by γ-detection using a Ge(Li) detector. For measuring short-lived activities, a pneumatic tube system was used. The neutron energy was 14.6±0.2 MeV for all activations. The results obtained for the total (n, p) cross sections show decreasing values with increasing number of neutrons for a given proton number. This trend obviously follows the behaviour of the difference of the proton and neutron separation energies, determining the competition between proton and neutron emission.
The 14.8 MeV neutron cross sections for enriched isotopes of 82Se, 92Mo, 117Sn, 128Te and 130Te
1972, Nuclear Physics, Section A

View all citing articles on Scopus

View full text

Article preview

Nuclear Physics A

Abstract

References (13)

Nucl. Phys.

Nucl. Phys.

ZhETF (USSR)

Phys. Rev.

ZhETF (USSR)

ZhETF (USSR)

Cited by (17)

Compilation of isomeric ratios of light particle induced nuclear reactions

Activation cross sections for 13.6 MeV neutron induced reactions on natural tin

Investigation of (n, p), (n, 2n) reaction cross sections for Sn isotopes for fusion reactor applications

The experimental isomeric cross-section ratio in the nuclear activation technique

Measurement of (n, p) cross sections on isotopes of Cd, Sn and Te for 14 MeV neutrons

The 14.8 MeV neutron cross sections for enriched isotopes of <sup>82</sup>Se, <sup>92</sup>Mo, <sup>117</sup>Sn, <sup>128</sup>Te and <sup>130</sup>Te