Isomer ratios of 90Y and 91Y in the fission of 235U and 238U by protons of energies 20–85 MeV

1969 ◽  
Vol 47 (20) ◽  
pp. 3817-3822 ◽  
Author(s):  
A. H. Khan ◽  
G. B. Saha ◽  
L. Yaffe
Keyword(s):  
Angular Momentum ◽  
Energy Range ◽  
Theoretical Calculation ◽  
Bombarding Energy

Isomer ratios of 90Y and 91Y formed in the fission of 235U and 238U induced by protons of energies 20–85 MeV have been determined. For both 90Y and 91Y the isomer ratios are always higher in 235U fission than in 238U fission. Isomer ratios of 90Y in 238U fission and those of 91Y in 235U and 238U fission remain almost constant in the energy range of 20–85 MeV, whereas those of 90Y in 235U fission increase with increasing bombarding energy. A theoretical calculation of these ratios indicates that the primary fragments leading to the formation of these isomers possess [Formula: see text] units of angular momentum.

Analysis of 134Cs Isomer Ratios in the Fission of 237Np with Protons in the Energy Range 20–85 MeV

1972 ◽  
Vol 50 (12) ◽  
pp. 1877-1881 ◽  
Author(s):  
C. L. Rao ◽  
L. Yaffe
Keyword(s):  
Angular Momentum ◽  
Energy Range ◽  
Root Mean Square ◽  
Compound Nucleus ◽  
Direct Interaction ◽  
Isomer Ratio ◽  
Mean Square ◽  
Fission Process ◽  
Compound Nucleus Formation ◽  
Bombarding Energy

An analysis has been made of the isomer ratio, σm/((σm + σg) for 134Cs isomers formed in the fission of 237Np by protons of energies 20–85 MeV. Compound nucleus formation was assumed up to a bombarding energy of 50 MeV, with direct interaction as the mechanism at higher energies. Values of the root-mean-square angular momentum of [Formula: see text] at 20 MeV and [Formula: see text] at 60–85 MeV bombarding energy agree with the experimental results. The results are consistent with the hypothesis that angular momentum is generated in the fission process.

Production efficiency and radioisotopic purity of 99mTc formed using the (p,2n) reaction on a highly enriched 100Mo target

2017 ◽  
Vol 32 (17) ◽  
pp. 1740012
Author(s):  
Katarzyna Szkliniarz ◽  
Mateusz Sitarz ◽  
Jerzy Jastrzębski ◽  
Jarosław Choiński ◽  
Andrzej Jakubowski ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Production Efficiency ◽  
Irradiation Time ◽  
Thick Target ◽  
Bombarding Energy

The [Formula: see text]Tc isomer was produced using the [Formula: see text] reaction on highly enriched [Formula: see text]Mo samples. The Thick Target Yields were determined in the energy range from 16 MeV to 26 MeV and compared with the values calculated using the most recent cross-section recommendations from the literature. The generated impurities were also determined. It was shown that for 99.815 ± 0.010% enriched samples, only reactions induced on [Formula: see text]Mo are of importance. The ratio of the number of atoms of [Formula: see text]Tc to all produced Tc nuclei was studied as a function of irradiation time and bombarding energy.

scholarly journals Attempts to Produce Superheavy Elements by Fusion ofCa48withCm248in the Bombarding Energy Range of 4.5-5.2 MeV/u

1985 ◽  
Vol 54 (5) ◽  
pp. 406-409 ◽  
Author(s):  
P. Armbruster ◽  
Y. K. Agarwal ◽  
W. Brüchle ◽  
M. Brügger ◽  
J. P. Dufour ◽  
...  
Keyword(s):  
Energy Range ◽  
Superheavy Elements ◽  
Bombarding Energy

Scattering of Alpha Particles by Oxygen. I. Bombarding Energy Range 5.8 to 10.0 MeV

1967 ◽  
Vol 160 (4) ◽  
pp. 782-790 ◽  
Author(s):  
W. E. Hunt ◽  
M. K. Mehta ◽  
R. H. Davis
Keyword(s):  
Energy Range ◽  
Alpha Particles ◽  
Bombarding Energy

scholarly journals Formation Cross Sections of Iodine and Tellurium Isomers Produced in the Fission of 238U by Protons of Energies 30–85 MeV

1975 ◽  
Vol 53 (20) ◽  
pp. 3116-3120 ◽  
Author(s):  
M. Dikšić ◽  
L. Yaffe
Keyword(s):  
Angular Momentum ◽  
Root Mean Square ◽  
High Spin ◽  
Cross Sections ◽  
Natural Uranium ◽  
Mean Square ◽  
Spin Isomer ◽  
High Spin Isomer ◽  
Bombarding Energy

Formation cross sections of isomers of 130I, 132I, 134I, 131Te, and 133Te have been obtained from the fission of natural uranium by protons of energies 30–85 MeV. The high-spin isomer is favored in the production and increase in bombarding energy favors the production of the high-spin isomer. From the isomer ratios values of [Formula: see text] the root-mean-square angular momentum, were obtained. These increase with increasing bombarding energy.

scholarly journals Spectroscopy of natural parity states in 20Ne via the 19F(p,α0) and 19F(p,απ)reactions at low energies

2019 ◽  
Vol 223 ◽  
pp. 01067
Author(s):  
Mariano Vigilante
Keyword(s):  
Energy Range ◽  
Data Sets ◽  
Proton Emission ◽  
Low Energies ◽  
Natural Parity ◽  
Emission Threshold ◽  
Bombarding Energy ◽  
First Time ◽  
Existing Data

The 19F(p,α0)16O and 19F(p,απ)16O reactions can be fruitfully exploited to probe natural parity states above the proton emission threshold in the compound 20Ne nucleus. However, despite the relatively large number of data sets published in the literature, it is still not possible to draw a fully unambiguous picture of the spectroscopy of 20Ne, especially close to the proton emission threshold. To contribute to clarify these aspects, we have collected and reviewed all existing data sets of the 19F(p,α0)16O and 19F(p,απ)16O reactions to perform, for the first time, a comprehensive R-matrix fit including both reactions in the bombarding energy range Ep = 0:2–10 MeV. Our analysis clarifies several ambiguities present in the literature and affecting the spectroscopy of 20Ne and clearly demonstrates the importance of the 19F(p,απ) reaction to better constraint the spectroscopy parameters of the fit.

Elastic Scattering of Alpha Particles byC12in the Bombarding Energy Range 10 to 19 MeV

1964 ◽  
Vol 133 (6B) ◽  
pp. B1421-B1433 ◽  
Author(s):  
E. B. Carter ◽  
G. E. Mitchell ◽  
R. H. Davis
Keyword(s):  
Elastic Scattering ◽  
Energy Range ◽  
Alpha Particles ◽  
Bombarding Energy
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