Search for the double beta decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Pu</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>244</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Kj, Moody; Rw, Lougheed; Ek, Hulet

doi:10.1103/physrevc.46.2624

Cited by 10 publications

(7 citation statements)

References 35 publications

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“…are forbidden. In particular we predict a null result for the present search in 244 P u [6], a potential strong test of our model. Inclusion of pairing within the same truncation scheme will allow mixing of different pseudo SU(3) irreps, and is in progress [19].…”

Section: Resultsmentioning

confidence: 47%

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Neutrinoless double beta decay in heavy deformed nuclei

1995

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The pseudo SU(3) approach is used to describe low lying states and BE(2) intensities of rare earth and actinide nuclei which are ββ decay candidates. The ββ half lives of some of these nuclei to the ground and excited states of the final ones are evaluated for both the two and zero neutrino emitting modes. The existence of selection rules which strongly restricts the decays is discussed. These restrictions represent a possible test of the model. Up to now the predictions are in good agreement with the available experimental data. Resumen:El formalismo pseudo SU(3) es usado para describir los estados de menor energía y sus intensidades BE(2) de núcleos en la región de las tierras raras y los actinídos que son candidatos a decaimientos ββ. Las vidas medias de esta desintegración para algunos de estos núcleos al estado fundamental y estados excitados del núcleo hijo son evaluadas en los modos con y sin emisión de neutrinos. Se discute la existencia de reglas de selección que restringen fuertemente los decaimientos y representan una posible prueba para el modelo. Hasta el momento el acuerdo entre las predicciones y los datos experimentales disponibles es bueno.

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Section: Resultsmentioning

confidence: 47%

“…The experimental research on the double beta decay of heavy deformed nuclei enjoys an increasing activity. Thus, the ββ 2ν half-life of 238 U [3] and 150 Nd [2,4,5] have been measured and search is in progress for 244 P u [6].…”

Section: Introductionmentioning

confidence: 99%

Neutrinoless double beta decay in heavy deformed nuclei

1995

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“…It follows that the present version of theory predicts the complete suppression of the fl/32v decay for the following five nuclei: 154Sm, 16°Gd, 176yb, 23ZTh and 244pu [8]. In particular it predicts a null result for the present search in 244pu [8], a potentially strong test of our model. Inclusion of pairing within the same truncation scheme will allow mixing of different pseudo SU(3) irreps.…”

Section: Forbidden Decayssupporting

confidence: 47%

Untitled

Hirsch

Castaños²,

Hess³

et al. 1998

Czechoslovak Journal of Physics

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The pseudo SU(3) model is shown to be a powerful scheme for describing the excitation spectra as well as B(E2) and B(MI) transition strengths in heavy deformed nuclei. It is also useful for describing double beta decay amplitudes for transitions from the ground state of an even-even nucleus to the ground and excited states of the daughter nucleus, both for the two and zero neutrino emitting modes. The existence of selection rules which strongly restricts the decays is discussed. Anti-correlations between the quadrupole deformation and the Gamow-Teller (GT +) strength axe found in an extension of the pseudo SU(3) model which explicitly includes pa~ring, which is also able to describe the fragmentation of the scissors mode. The projected shell model is introduced and proposed as an alternate means for studying single and double beta decay processes.

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“…Current possibilities to create radioactive ion beams on accelerators and accumulate them in storage rings are on the level of 10 19 nuclei per year [21]. As concerning the reactor-produced isotopes, such an approach was already employed once in radiochemical search for 2β decay of 244 Pu where the limit (on all modes) was set as T 1/2 ≥ 1.1×10 18 yr [22].…”

Section: Introductionmentioning

confidence: 99%

On the possibility to search for 2β decay of initially unstable (α/β radioactive) nuclei

et al. 2005

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Possibilities to search for 2β decay of α/β unstable nuclei, many of which have higher energy release than "conventional" (β stable) 2β candidates, are discussed. First experimental halflife limits on 2β decay of radioactive nuclides from U and Th families (trace contaminants of the CaWO 4 , CdWO 4 and Gd 2 SiO 5 scintillators) were established by reanalyzing the data of low-background measurements in the Solotvina Underground Laboratory with these detectors (1734 h with CaWO 4 , 13316 h with CdWO 4 , and 13949 h with Gd 2 SiO 5 crystals).

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Search for the double beta decay ofPu244

Cited by 10 publications

References 35 publications

Neutrinoless double beta decay in heavy deformed nuclei

Neutrinoless double beta decay in heavy deformed nuclei

Untitled

On the possibility to search for 2β decay of initially unstable (α/β radioactive) nuclei

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