CLUSTERS IN THE BETA-DECAY OF LIGHT EXOTIC NUCLEI

The β-decay is a useful tool to study the peculiar features present in light exotic nuclei, such as halos and cluster structures. The large Q-values and low breakup thresholds in the daughter nuclei allow channels with feeding to continuum states and delayed emission of nucleons and light ions. We report experimental results obtained using a technique where the radioactive nuclei are implanted in a finely segmented detector, and the decay channels are identified through the correlation between the implanted nuclei and subsequent decays. Decays involving cluster and halo states in 12 C , 6 He , 11 Li and 11 Be were measured.

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Review of fundamental nuclear-geophysical researches in OSENU: i. standard beta decay theory elements and new cooperative electron-β-nuclear spectroscopy

Ukrainian hydrometeorological journal ◽

10.31481/uhmj.16.2015.03 ◽

2017 ◽

pp. 24-29

Author(s):

A.V. Glushkov

Keyword(s):

Beta Decay ◽

Nuclear Reactions ◽

Nuclear Spectroscopy ◽

Β Decay ◽

Geophysical Research ◽

Modern Approach ◽

Decay Channels ◽

Exotic Decay ◽

Nuclear Geophysics ◽

Integral Energy

This paper opens a series of publications, devoted to review of new results of the original nuclear-geophysical researches at the OSENU mathematics department and its laboratories (computational and quantum mathematics and mechanics, environmental radioactivity, nuclear geophysics). Primarily the first material will focus on fundamental issues that constitute the theoretical basis of the further applied nuclear-geophysical research. It is shortly presented a modern approach to computing the key parameters of the beta decay processes. There are discussed the cooperative electron β-nuclear processes in atoms and molecules, including the excitation, ionization, electronic rearrangement, induced by the nuclear reactions and β-decay. A few factors are taken into account: changing the integration limits in the Fermi function integral, energy corrections for different chemical substances, and the possibility of the bound β-decay or other exotic decay channels.

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K shell X-ray intensity ratios, K-Li, K-L, and K-M vacancy transfer probabilities of Ba and Tl following internal conversion process

Canadian Journal of Physics ◽

10.1139/cjp-2014-0105 ◽

2014 ◽

Vol 92 (11) ◽

pp. 1489-1493 ◽

Cited By ~ 4

Author(s):

P.V. Sreevidya ◽

S.B. Gudennavar ◽

Daisy Joseph ◽

S.G. Bubbly

Keyword(s):

Beta Decay ◽

Internal Conversion ◽

Experimental Results ◽

Conversion Process ◽

X Rays ◽

X Ray ◽

Multichannel Analyser ◽

Intensity Ratios

K shell X-rays of barium and thallium following internal conversion decay in Cs137 and Hg203, respectively, were detected using a Si(Li) X-ray detector coupled to PC-based 8k multichannel analyser employing the method suggested earlier by our group. The K shell X-ray intensity ratios and vacancy transfer probabilities for thallium and barium were calculated. The obtained results are compared with theoretical, semiempirical, and others’ experimental results obtained via photoionization as well as decay processes. The effects of beta decay and internal conversion on X-ray emission probabilities are discussed.

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The Resonant and Normal Auger Spectra of Ozone

Symmetry ◽

10.3390/sym13030516 ◽

2021 ◽

Vol 13 (3) ◽

pp. 516

Author(s):

Simone Taioli ◽

Stefano Simonucci

Keyword(s):

Bound States ◽

Point Group ◽

Coulomb Repulsion ◽

Theoretical Description ◽

Incoming Wave ◽

Decay Channels ◽

Continuum States ◽

Symmetric Molecule ◽

Accurate Treatment ◽

Auger Spectra

In this work, we outline a general method for calculating Auger spectra in molecules, which accounts for the underlying symmetry of the system. This theory starts from Fano’s formulation of the interaction between discrete and continuum states, and it generalizes this formalism to deal with the simultaneous presence of several intermediate quasi-bound states and several non-interacting decay channels. Our theoretical description is specifically tailored to resonant autoionization and Auger processes, and it explicitly includes the incoming wave boundary conditions for the continuum states and an accurate treatment of the Coulomb repulsion. This approach is implemented and applied to the calculation of the K−LL Auger and autoionization spectra of ozone, which is a C2v symmetric molecule, whose importance in our atmosphere to filter out radiation has been widely confirmed. We also show the effect that the molecular point group and, in particular, the localization of the core-hole in the oxygen atoms related by symmetry operations, has on the electronic structure of the Auger states and on the spectral lineshape by comparing our results with the experimental data.

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β -decay Q values among the A=50 Ti-V-Cr isobaric triplet and atomic masses of Ti46,47,49,50,V50,51 , and Cr50,52–54

Physical Review C ◽

10.1103/physrevc.96.044321 ◽

2017 ◽

Vol 96 (4) ◽

Cited By ~ 8

Author(s):

R. M. E. B. Kandegedara ◽

G. Bollen ◽

M. Eibach ◽

N. D. Gamage ◽

K. Gulyuz ◽

...

Keyword(s):

Β Decay ◽

Atomic Masses ◽

Q Values

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Results from the Cuore Experiment †

Universe ◽

10.3390/universe5010010 ◽

2019 ◽

Vol 5 (1) ◽

pp. 10 ◽

Cited By ~ 2

Author(s):

Alessio Caminata ◽

Douglas Adams ◽

Chris Alduino ◽

Krystal Alfonso ◽

Frank Avignone ◽

...

Keyword(s):

Beta Decay ◽

Energy Resolution ◽

Half Life ◽

Precise Measurement ◽

Region Of Interest ◽

Neutrinoless Double Beta Decay ◽

Double Beta Decay ◽

Effective Energy ◽

Β Decay ◽

Compact Structure

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO 2 crystals arranged in a cylindrical compact structure of 19 towers, each of them made of 52 crystals. The construction of the experiment was completed in August 2016 and the data taking started in spring 2017 after a period of commissioning and tests. In this work we present the neutrinoless double beta decay results of CUORE from examining a total TeO 2 exposure of 86.3 kg yr , characterized by an effective energy resolution of 7.7 keV FWHM and a background in the region of interest of 0.014 counts / ( keV kg yr ) . In this physics run, CUORE placed a lower limit on the decay half-life of neutrinoless double beta decay of 130 Te > 1.3 · 10 25 yr (90% C.L.). Moreover, an analysis of the background of the experiment is presented as well as the measurement of the 130 Te 2 ν β β decay with a resulting half-life of T 1 / 2 2 ν = [ 7.9 ± 0.1 ( stat . ) ± 0.2 ( syst . ) ] × 10 20 yr which is the most precise measurement of the half-life and compatible with previous results.

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