Excitation of 109Pd and 112In nuclear isomers in (γ, n) reactions

Mazur, V.M.; Bigan, Z.M.; Symochko, Dmytro

doi:10.1134/s1547477108040079

Cited by 10 publications

(9 citation statements)

References 3 publications

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“…A simple, two-parameter fit is used to deduce cross-sections from the measured yields. Where existing data are available [10][11][12][13][14], our results are found to be in broad agreement with these measurements. To the best of our knowledge, these results represent the first measurements of the (c,n) cross-sections of the A = 96, 98 and 104 Ru isotopes at any energies and the first measurements of the (c,n) cross-sections of the A = 102, 108 and 110 Pd isotopes at end-point energies below 15 MeV.…”

Section: Discussionsupporting

confidence: 94%

Measurement of activation yields for platinum group elements using Bremsstrahlung radiation with end-point energies in the range 11–14MeV

Tickner

Bencardino

Roach

2010

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Discussionsupporting

confidence: 94%

Measurement of activation yields for platinum group elements using Bremsstrahlung radiation with end-point energies in the range 11–14MeV

Tickner

Bencardino

Roach

2010

Nuclear Instruments and Methods in Physics Research Section B:

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“…In and 115 In target nuclei are 9/2 + and the ( ,n)-reactions can result two long-lived isomers in each residual nuclei. However large difference between the spins of the target and residual nuclei ground states (see Table) In reactions are practically the total cross sections of the ( ,n)-reactions in the near threshold energy range and it is confirmed by isomeric ratio measurements [5]. Figure 1 shows the integral yields of the ( ,n)-reactions calculated by the activation equation for the 113 In and 115 In targets as the functions of the bombarding end point energy.…”

mentioning

confidence: 76%

“…The red (solid) curves represent our results and the blue (dash) ones correspond to the theoretical values calculated with the NON-SMOKER code [7]. Three points with the error bars in upper panel represent the results of one of our authors (V. M.) with his co-workers [5] for the 113 In( ,n) 112m…”

Section: E E Ementioning

confidence: 99%

Reaction rates of the¹¹³In(γ,n)^112mIn and¹¹⁵In(γ,n)^114mIn

Skakun

Semisalov

Kasilov

et al. 2016

J. Phys.: Conf. Ser.

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( ,n) 196 Au reaction cross sections as the standard for the absolute photon intensity determination. The metallic indium samples of the natural and enriched compositions were irradiated by the bremsstrahlung beams from thin tantalum converters of the electron linear accelerator of NSC KIPT (Kharkiv) and the microtron of IEP (Ughhorod). The integral reaction yields were determined from the activities of the nuclei-products measured by the high resolution -ray spectrometry technique with Ge(Li)-and HPGe-detectors. The reaction rates for the Planck spectrum of a thermal photon bath were derived for the ground state target nuclei and compared to the predictions of the statistical model of nuclear reactions. IntroductionNaturally occurred weak-abundant proton-rich isotopes of a group named as p-nuclei can not be reached by the stellar slow (s) and rapid (r) neutron capture processes synthesizing the overwhelming majority of middle and heavy nuclei. Proton capture reactions (p-process) and photodisintegration of s-and r-process seed nuclei ( -process) are considered as most probable mechanisms of the p-nuclei synthesis. The large network of low energy nuclear reaction rates (derived from the cross sections) is required for the p-nuclei natural abundance simulation and parametrization of the statistical theory of nuclear reactions called to supply non-measurable reaction cross sections. The -process temperatures of T 9 =2 3 (T 9 is the temperature in 10 9 Kelvin) are provided by the oxygen-and neon-rich layers of type II supernovae and the stellar reaction rates are determined by the product of the Planck spectrum of the black-body radiation characteristic for the thermal interior of a star and the photonuclear reaction cross section [1,2]. As a result, the significant astrophysical energy range is the region of (1.5 2.0) MeV immediately above the photonuclear reaction threshold. Electron accelerators were earlier used as powerful sources of bremsstrahlung for measurements of photonuclear reaction cross sections. However over the years major portion of photonuclear reaction cross section measurements was fulfilled at larger energies.The integral yields and derived the ( ,n)-reaction rates for the nuclei of the indium isotopes near the threshold energies would be useful for the problem of the p-nuclei stellar synthesis and parametrization of the statistical theory of nuclear reactions.

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“…Previously, isomeric ratios in the 110 Pd( , ) 109 , Pd reaction were measured in c ○ S. PALVANOV, T. AKHMADZHANOV, 2021 [5][6][7][8]. In [5,6,8], measurements were carried out at several points of the maximum energy of bremsstrahlung.…”

Section: Introductionmentioning

confidence: 99%

“…In [5,6,8], measurements were carried out at several points of the maximum energy of bremsstrahlung. In [7], isomeric ratios were measured in the energy interval 9-18 MeV. In the energy region above 21 MeV, the energy dependence of the isomeric ratio of the yields was practically not measured.…”

Section: Introductionmentioning

confidence: 99%