Configuration-mixed-shell-model relative-alpha-decay-rate calculations for spherical doubly odd nuclei (At212andAtm212)

A local fractal analysis by all permutations method (APM) was developed. APM-analysis of noise-like time series of alpha decay rate fluctuations made it possible to reveal the spectrum of periods in the range of 1-120 min. The connection of this spectrum with the spectrum of the Earth natural oscillations was shown, and an assumption was made about its universal character, which means that it is present in fluctuations of processes of various nature. In this work, the APM method was used to study the noise-like time series of planarium chemiluminescence fluctuations. A spectrum of periods ranging from minutes to two hours has been obtained. A detailed coincidence of the found spectrum with the spectrum that we found earlier is shown. The results of present study confirm this earlier assumption about the universal nature of the detected spectrum of periods. For the mentioned range of periods, there were shown not only the close relationship of the found spectrum with the spectrum of the Earth's natural oscillations, but also its universal character: the spectra of the periods found for fluctuation in the systems of various nature (physical, chemical, biological) always coincided with the corresponding part of the found spectrum.

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REFLECTION ASYMMETRY IN THE TRANSITIONAL ODD-ODD NUCLEUS 220Fr

International Journal of Modern Physics E ◽

10.1142/s0218301392000187 ◽

1992 ◽

Vol 01 (02) ◽

pp. 363-377 ◽

Cited By ~ 7

Author(s):

C. F. LIANG ◽

P. PARIS ◽

R. K. SHELINE

Keyword(s):

Shell Model ◽

Level Structure ◽

Alpha Decay ◽

Parity Doublet ◽

Reflection Asymmetry

Using a selective fluorination method, mass separated sources of 224 Ac (separated as [Formula: see text]) were used to study the level structure of 220 Fr following alpha decay. Parity doublet bands with K = 1± were observed and three other bands with K = 2± and K = 0− were proposed. All five bands can be explained in terms of low lying n − p configurations predicted in reflection asymmetric models. Evidence is presented that 220 Fr is a transitional nucleus with spectroscopy intermediate between shell model and octupole-quadrupole spectroscopies.

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On the universal spectrum of periods in the time series of temperature fluctuations in starlings and rats

CPT2020 The 8th International Scientific Conference on Computing in Physics and Technology Proceedings ◽

10.30987/conferencearticle_5fce2772b9b793.28915214 ◽

2020 ◽

Author(s):

Mikhail Diatroptov ◽

Victor Panchelyuga ◽

Maria Panchelyuga ◽

Olga Seraya

Keyword(s):

Experimental Data ◽

Time Series ◽

Spectral Analysis ◽

Fourier Transform ◽

Decay Rate ◽

Fractal Analysis ◽

Temperature Fluctuations ◽

Alpha Decay ◽

Experimental Data Processing ◽

Universal Spectrum

The paper considers a spectral analysis based on Fourier transform of the time series in the temperature fluctuations in the bodies of common starlings (Sturnus vulgaris) and rats (mature Wistar males). The spectra of the periods in the starlings and rats contain the same sets of harmonics, so on this basis we can tell about a common spectrum. Interesting to note that the spectrum coincides with a previously revealed spectrum of the periods, obtained with the use of local fractal analysis by the all permutations method in the course of studies of time series of the alpha decay rate fluctuations. Despite different methods of the experimental data processing used in this work (spectral analysis based on Fourier transform and local fractal analysis by the all permutations method), as well as different raw experimental data (the temperature fluctuations and alpha-decay rate fluctuations), the same spectrum of periods was obtained. On this basis, we can consider the spectrum of periods as universal one.

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On alpha-decay rates in heavy nuclei

Canadian Journal of Physics ◽

10.1139/p68-140 ◽

1968 ◽

Vol 46 (9) ◽

pp. 1119-1128 ◽

Cited By ~ 9

Author(s):

L. Scherk ◽

E. W. Vogt

Keyword(s):

Shell Model ◽

Alpha Particle ◽

Residual Nucleus ◽

Alpha Decay ◽

Decay Rates ◽

Nuclear Shell Model ◽

Heavy Nuclei ◽

Spectroscopic Factors ◽

The One ◽

Nuclear Shell

The alpha-decay rates in heavy nuclei are analyzed by a method in which the decay rates are factored into one-body widths and spectroscopic factors. It is shown that the discrepancy between the absolute values of the experimental alpha-decay rates and those calculated with the nuclear shell model has mainly resided in the incorrect assessment of the one-body widths and that it can be largely removed by a more direct treatment of the average interaction between the alpha particle and the residual nucleus.

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OCTUPOLE DEFORMATION IN 221Fr; E1 TRANSITION RATES

Modern Physics Letters A ◽

10.1142/s0217732390001402 ◽

1990 ◽

Vol 05 (16) ◽

pp. 1243-1250 ◽

Cited By ~ 10

Author(s):

C.F. LIANG ◽

A. PÉGHAIRE ◽

R.K. SHELINE

Keyword(s):

Experimental Data ◽

Shell Model ◽

Mass Number ◽

Transition Probabilities ◽

Alpha Decay ◽

Transition Rates ◽

Octupole Deformation

Experimental data following the alpha decay of 225 Ac are interpreted in terms of a spectroscopy in 221 Fr consistent with octupole deformation. However, the measured E1 transition probabilities suggest that the low lying bands in 221 Fr are considerably more mixed than in nuclei with slightly higher mass number. It is suggested that this mixing of states in 221 Fr is indicative of the partial collapse of Nilsson-like orbitals into more degenerate shell model orbitals.

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