An empirical formula for the half-lives of exotic two-proton emission

Sreeja, I.; Balasubramaniam, M.

doi:10.1140/epja/i2019-12694-5

Cited by 42 publications

(41 citation statements)

References 60 publications

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“…In addition, by comparing the halflives within the ELDM [34] and an empirical formula of Ref. [51] with the experimental ones, the same conclusion can be obtained. So, it can be drawn that the GLDM has a comparable accuracy with the two other methods.…”

Section: Resultssupporting

confidence: 65%

“…Note that Mukha et al measured the 2p decay halflife of the 21 + isomer state of 94 Ag [52]. The measured half-life is 80 s. However, the calculated half-life with the GLDM is as long as 5.0×10 4 s. Previous studies suggested that the 21 + isomer of 94 Ag is assumed to be very strongly deformed nucleus [4,34,51,52]. A recent work of Goigoux et al suggested that the deformation of a nucleus played crucial role in the 2p decay half-life [10].…”

Section: Resultsmentioning

confidence: 96%

“…The calculated logarithm half-lives by the GLDM, the ELDM [34], and an empirical formula of Ref. [51] are listed in the 4th-6th columns. In calculations the orbital angular momenta carried by the 2p pair are all zero which is determined by the spin-parity selection rule.…”

Section: Resultsmentioning

confidence: 99%

“…For the empirical formula of Ref. [51], the parameters are fitted by the predicted 2p decay half-lives of the ELDM. This may be the reason why the experimental half-lives of the 21 + isomer of 94 Ag are not reproduced by the three models.…”

Section: Resultsmentioning

confidence: 99%

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Two-proton radioactivity within a generalized liquid drop model

et al. 2020

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The generalized liquid drop model (GLDM) is firstly extended to study the two-proton (2p) radioactivity half-lives of the ground-state of nuclei. According to the comparison between the calculated half-lives and the experimental data, it is shown that the GLDM describes the 2p radioactivity half-lives well. In addition, by comparing its accuracy with other models, it is found that the GLDM has a comparable accuracy with them. Finally, the 2p radioactivity half-lives of some most probable candidates are predicted with the GLDM by inputting the Q2p values (the released energy of the 2p radioactivity) from the updated AME 2016 Mass Table, which may be useful for future experiments.

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Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Two-proton radioactivity within a generalized liquid drop model

et al. 2020

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“…For benchmark, the predicted results using GLDM, ELDM and the four-parameter empirical formula, which are extracted from Ref. [37], [33] and [36], are also listed in this table. From this table, we can clearly see that for the cases of l = 0, the predicted results using our empirical formula are more close to the predicted ones using ELDM comparing with the predicted results using the four-parameter empirical formula, most of the predicted results are of the same order of magnitude.…”

Section: Resultsmentioning

confidence: 99%

New Geiger-Nuttall law for two-proton radioactivity *

Zou

Pan

et al. 2021

Chinese Phys. C

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In the present work, combining with the Geiger-Nuttall law, a two-parameter empirical formula is proposed to study the two-proton (2p) radioactivity. Using this formula, the calculated 2p radioactivity half-lives are in good agreement with the experimental data as well as the calculated ones obtained by Goncalves et al. ([Phys. Lett. B 774, 14 (2017)]) using the effective liquid drop model (ELDM), Sreeja et al. ([Eur. Phys. J. A 55, 33 (2019)]) using a four-parameter empirical formula and Cui et al. ([Phys. Rev. C 101: 014301 (2020)]) using a generalized liquid drop model (GLDM). In addition, this two-parameter empirical formula is extended to predict the half-lives of 22 possible 2p radioactivity candidates, whose the 2p radioactivity released energy Q2p>0, obtained from the latest evaluated atomic mass table AME2016. The predicted results have good consistency with ones using other theoretical models such as the ELDM, GLDM and four-parameter empirical formula.

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