The decay of 12.9 d Cs136

Reising, R.; Pate, Brian D.

doi:10.1016/0029-5582(65)90328-7

Cited by 21 publications

(5 citation statements)

References 13 publications

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“…The two new levels seen in this work are those at 2356.6 and 2373.7 keV. For discussions of the other levels, we refer thy reader to previous works on this nucleus [2][3][4][5][6][7]. The 2374-keV level decays by four gamma rays rays with a total intensity of 0.21, which gives a log-ft value of 8.0 for beta decay to this level.…”

Section: Experimental Results and Decay Schemementioning

confidence: 95%

“…They include decay scheme studies of 136La E5, 6], neutron capture gamma-ray studies [8,12], and reaction spectroscopy studies [7]. Except for our initial report [3], no new data have been added on the decay of 136Cs since Reising and Pate [2], except for the note of Frana et al [4]. The gamma-ray spectrum detected from the decay of 136Cs cannot be improved over that given by these authors using ordinary singles gamma-ray spectroscopy.…”

Section: Discussionmentioning

confidence: 98%

“…Presumably it occurs at a lower energy than the 2-and 1 = levels from the (d3/~sL.z) state because of the extra energy gained in the coupling of the h./~2 hole to a d3i 2 hole. The population of the 2 140-keV 5 level [2,3] has a log-J? value of 8.4, which is consistent with the assumption that this level is predominately a two-neutron level.…”

Section: Discussionmentioning

confidence: 99%

“…This paper is one of a series on our investigation of the levels of the even-even barium nuclei. The decay of 136Cs was last studied by Reising and Pate [2] using magnetic electron spectrometry, NaIscintillation spectrometry, and 7-~ coincidence spectrometry. Other than our initial report [3] the only work is that of Frana et al [4].…”

Section: Introductionmentioning

confidence: 99%

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Two quasi-particle levels in136Ba and the decay of136Cs

1975

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Section: Experimental Results and Decay Schemementioning

confidence: 95%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Two quasi-particle levels in136Ba and the decay of136Cs

1975

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“…The Q * β − value for this transition can be deduced from the sub-keVprecision energy-level E * data in [32] and the gs-to-gs Q value of 2548.2 (19) keV from AME2020 [33]. The gs-to-gs Q value of 136 Cs in AME2020 is evaluated primarily using data from two 136 Cs(β − ) 136 Ba-decay experiments performed more than 60 years ago [34,35]. Previous studies have already demonstrated that Q values derived in indirect methods, such as decay spectroscopy, show large discrepancies with those from direct mass measurements and can be inaccurate over a wide range of mass numbers [20,36,37].…”

Section: Introductionmentioning

confidence: 99%

β− decay Q -value measurement of Cs136 and its implications for neutrino studies

Ge,

Eronen,

de Roubin

et al. 2023

Phys. Rev. C

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The β − decay Q value of 136 Cs (J π = 5 + , t 1/2 ≈ 13 d) was measured with the JYFLTRAP Penning trap setup at the Ion Guide Isotope Separator On-Line facility of the University of Jyväskylä, Finland. The monoisotopic samples required in the measurements were prepared with a new scheme utilized for the cleaning, based on the coupling of dipolar excitation with Ramsey's method of time-separated oscillatory fields and the phase-imaging ion-cyclotron-resonance technique. The Q value is determined to be 2536.83(45) keV, which is ≈4 times more precise and 11.4(20) keV (≈6σ ) smaller than the adopted value in the most recent Atomic Mass Evaluation AME2020. The daughter, 136 Ba, has a 4 + state at 2544.481(24) keV and a 3 − state at 2532.653(23) keV, both of which can potentially be ultralow Q-value end states for the 136 Cs decay. With our new ground-to-ground state Q value, the decay energies to these two states become −7.65(45) keV and 4.18(45) keV, respectively. The former is confirmed to be negative at the level of ≈17σ , which verifies that this transition is not a suitable candidate for neutrino mass determination. On the other hand, the slightly negative Q value makes this transition an interesting candidate for the study of virtual β-γ transitions. The decay to the 3 − state is validated to have a positive low Q value which makes it a viable candidate for neutrino mass determination. For this transition, we obtained a shell-model-based half-life estimate of 2.1 +1.6 −0.8 × 10 12 yr. Furthermore, the newly determined low reaction threshold of 79.08(54) keV for the charged-current ν e + 136 Xe (0 + ) → 136 Cs * + e − neutrino capture process is used to update the cross sections for a set of neutrino energies relevant to solar 7 Be, pep, and CNO neutrinos. Based on our shell-model calculations, the new lower threshold shows event rates of 2-4 percent higher than the old threshold for several final states reached by the different species of solar neutrinos.

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Some Problems in the Study of Spherical Odd—Odd Nuclei

Peker

1969

Structure of Complex Nuclei / Struktura Slozhnykh Yader / CTPYKTYPA CЛOЖHЫX ЯдEP

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The decay of 12.9 d Cs136

Cited by 21 publications

References 13 publications

Two quasi-particle levels in136Ba and the decay of136Cs

Two quasi-particle levels in136Ba and the decay of136Cs

β− decay Q -value measurement of Cs136 and its implications for neutrino studies

Some Problems in the Study of Spherical Odd—Odd Nuclei

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