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2 edition of Isomeric cross-section ratios of Cd¹¹⁵ and Cs¹³⁴ for charged particle induced fission found in the catalog.

Isomeric cross-section ratios of Cd¹¹⁵ and Cs¹³⁴ for charged particle induced fission

Yin-sang Shum

Isomeric cross-section ratios of Cd¹¹⁵ and Cs¹³⁴ for charged particle induced fission

by Yin-sang Shum

  • 339 Want to read
  • 31 Currently reading

Published .
Written in English

    Subjects:
  • Nuclear fission.,
  • Angular momentum (Nuclear physics).

  • Edition Notes

    Statementby Yin-sang Shum.
    The Physical Object
    Pagination[8], 68 leaves, bound :
    Number of Pages68
    ID Numbers
    Open LibraryOL17907825M

    The isomeric yield ratios of m, g In, m, g In and m, g In in the nat In(,xn) reactions decrease very fast with the bemsstrahlung end-point energy from the threshold value to MeV due to the giant dipole resonance (GDR) effect. Above that, the isomeric yield ratios increase slowly with the bremsstrahlung energy due to the increase. The cross-ratio is a projective invariant in the sense that it is preserved by the projective transformations of a projective line.. In particular, if four points lie on a straight line L in R 2 then their cross-ratio is a well-defined quantity, because any choice of the origin and even of the scale on the line will yield the same value of the cross-ratio.

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Anaerobic biodegradation of linear alkylbenzene. 3 Expert Answer(s) - - NO OF ISOMERIC FORMS OF C7H9N HAVING BENZENE RING WILL BE. Answer this question and win exciting prizes.

    Coordination isomerism is a form of structural isomerism in which the composition of the complex ion varies. In a coordination isomer the total ratio of ligand to metal remains the same, but the ligands attached to a specific metal ion change. Ionization isomers can be thought of as occurring because of the formation of different ions in solution. Isomerism - Isomerism - Conformational isomers: Methane (CH4) is a molecule that is a perfect tetrahedron, and so it is commonly said that no isomerism is possible with methane. However, the carbon-hydrogen bonds of methane constantly vibrate and bend, so that on very short timescales an apparent isomerism can be said to exist. But these structures are not energy minima, and .


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Isomeric cross-section ratios of Cd¹¹⁵ and Cs¹³⁴ for charged particle induced fission by Yin-sang Shum Download PDF EPUB FB2

Isomeric cross-section ratios of Cd¹¹⁵ and Cs¹³⁴ for charged particle induced fission Public DepositedAuthor: Yin-sang Shum. Isomeric cross-section ratios of Cd¹¹⁵ and Cs¹³⁴ for charged particle induced fission.

Cross-sections and their isomeric ratios σ m /σ g in the energy range of 13–15 MeV for isomeric pair m Sb and g Sb produced by the Sb(n,2n) reaction have been measured by activation and off-line γ-ray spectrometric technique using the K Neutron Generator at the Chinese Academy of Engineering Physics (CAEP).

Specifically, the versatile Author: Junhua Luo, Li Jiang, Long He. The isomeric ratios and excitation functions were measured for the 59 Co(n, 2n) 58 Co reaction in the neutron energy range 12–18 MeV and for the 58 Ni(n, p) 58 Co reaction in the neutron range 2–18 MeV.

The isomeric ratio is also presented for the 59 Co(γ, n) 58 Co reaction induced by photons from 30 MeV electron bremsstrahlung. The results are compared with Cited by:   The (n, 2n) isomeric state/ground state cross section ratio σ m /σ g and the (n, 2n) isomeric state cross section σ m of Au have been measured in the energy range – MeV by activation techniques using a Ge(Li) detector gamma-ray spectrometer.

Neutrons were produced with the 3 H(d, n) 4 He reaction. The cross section ratios were Cited by: 3. The isomeric cross section ratio R = σ m /σ g for the reaction Au (α, 2 n) g,m Tl and Au (α, 4 n) g,m Tl has been determined by measuring the de-excitation gamma rays of the final nucleus in both prompt and delayed coincidence with the beam bursts of the IKO synchrocyclotron.

The excitation function of the two reactions has been obtained and is. The ratio of isomeric cross section has been measured and analysed by Huizenga 2) and oth 1,).

The cxperimental value obtained by Huizenga for this ratio is __+ Huizenga's theoretical ISOMERIC CROSS SECTIONS analysis yields values ofanddepending on the parameters used in his calculation. A nuclear isomer is a metastable state of an atomic nucleus, in which one or more nucleons (protons or neutrons) occupy higher energy levels than in the ground state of the same nucleus.

"Metastable" describes nuclei whose excited states have half-lives to times longer than the half-lives of the excited nuclear states that decay with a "prompt" half life (ordinarily on the.

The calculations of the isomeric ratios σm/σg for the reactions pairs ,Te(6,4He,n)mgXe and ,Te(8,6He,3n)mgXe were performed. The recently developed statistical model code EMPIRE was used. It was included the built-in parameter libraries and systematics. For the reactions induced by alpha-particles we used the Gilbert.

In proton-nucleus reactions, the ratios of the cross sections for 18 isomeric pairs were measured by the induced-activity method as functions of the initial-proton energy and of the number of emitted nucleons.

The isotopic effect and the cross sections for charge-exchange reactions are discussed. The experimental values of the cross sections for disintegration reactions like (p.

Isomeric cross-section ratio and excitation functions have been measured for ⠹³Nb(α,2n)⠹⠵Tc{sup m+g} reactions up to MeV.

In particle induced preequilibrium reactions. PDF | OnB Satheesh and others published Study of the various factors affecting the isomeric cross section ratios (ICR) in proton induced nuclear reactions on 90 Zr |.

Isomeric cross section ratios The ICR thus calculated for the production of Nd and Nd nuclei produced through proton and alpha induced reaction on Pr and are determined at various incident ener-gies and are plotted in Fig. 1 along with the available experimental data [5,6].

The anal-ysis indicate that the ICR has reflection on. Isomeric cross section ratios were measured for (n, 2n) reactions induced by MeV neutrons in In and Sb isotopes. Experimental results were compared with the theoretical calculations performed with the Huizenga and Wandenbosch method.

Isomeric cross section ratios for reactions Mn 55 (α, n)Co, 58 m, g Fe 56 (α, p n)Co 58 m, g and Rb 85 (α, 2 n)Y 87 m, g were measured by the activation method using a stacked-foil technique.

The experimental results of the energy dependence of σ m /σ g for Mn 55 (α, n)Co 58 m, g reaction were compared with the calculation using the square-well potential with the. @article{osti_, title = {The isomeric cross section ratios (ICSR) method at the investigation of the role of isospin at the population compound states cloused yrast band in the nuclear reactions with neutron heavy ions}, author = {Chuvilskay, T V and Seleznev, Yu G and Shirokova, A A and Herman, M}, abstractNote = {The calculations of the isomeric ratios.

Abstract. Ratios of total cross sections for the (n, 2n) reactions with MeV neutrons leading to the J π =4 +, 7 +, and metastable states in Ir and the J π =2 - 5 +, and metastable states in Au have been determined.

The experimental results for Ir are in agreement with the prediction of the statistical model of the compound nucleus. However, the cross section.

Isomeric cross-section ratio for the formation of {sup 58}Co{sup {ital m},{ital g}} in neutron, proton, deuteron, and alpha-particle induced reactions in the energy region up to 25 MeV Journal Article Sudar, S ; Qaim, S M ; Institute of Experimental Physics, Kossuth University, H Debrecen - Physical Review, C.

The isomeric cross section ratios for production mgRh and mg,mg,mgAg in reaction (p,n) were measured over energy range from ∼6 MeV to ∼9 MeV.

Statistical model calculations were performed for analyzing the experimental isomeric ratios and it was found that the theoretically calculated ratios agree well with our experimental results.

journal article: isomeric cross-section ratio for (n,2n) reactions induced by mev neutrons. The Co/sup 58/ isomeric cross section ratio for the (n,2n) reaction and ratios reported for other reactions leading to Co/sup 58/ are compared with theory and shown to be consistent with a value of approximately 4 for the parameter sigma which characterizes the dependence of .It has thus been shown that on the basis of the Hauser-Feshbach theory, and taking into account the law of the conservation of moment, the isomer ratio for the reactionNp (n, 2n) can be calculated.

The indeterminateness of the modeling of theNp level scheme, to all appearances, has little effect on the energy dependence of the isomeric ratio.Calculated isomeric cross section ratios in the reaction Se 80 (n, γ)Se 81m, g V.

P. Koroleva Soviet Atomic Energy vol pages – () Cite this article.