Nuclear Data Sheets for A = 36

Nica, N.; Cameron, J. A.; Singh, Balraj

doi:10.1016/j.nds.2012.01.001

Cited by 76 publications

(43 citation statements)

References 309 publications

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“…The excitation energy of the first 2 + state of 38 S is 1292 keV [55] and this suggests that a particle-core coupling description is appropriate for the 1517-keV J π = (11/2 − ) state of 39 S. in relation to the odd-A isotopes is rather sparse. The data presented in the figure were taken from Nuclear Data Sheet references [49,52,[55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72]. For the isotopes of sulfur and argon, the figure shows a good correlation between the behavior of the excitation energy of the first 2 + states of the even-A isotopes and the excitation energy differences of the first 11/2 − and first 7/2 − states of the odd-A isotopes with neutron number.…”

Section: Resultsmentioning

confidence: 85%

First in-beamγ-ray study of the level structure of neutron-richS39

et al. 2016

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The neutron-rich 39 S nucleus has been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of 36 S ions with a thin 208 Pb target. The magnetic spectrometer, PRISMA, and the γ -ray array, CLARA, were used in the measurements. Gamma-ray transitions of the following energies were observed: 339, 398, 466, 705, 1517, 1656, and 1724 keV. Five of the observed transitions have been tentatively assigned to the decay of excited states with spins up to (11/2 − ). The results of a state-of-the-art shell-model calculation of the level scheme of 39 S using the SDPF-U effective interaction are also presented. The systematic behavior of the excitation energy of the first 11/2 − states in the odd-A isotopes of sulfur and argon is discussed in relation to the excitation energy of the first excited 2 + states of the adjacent even-A isotopes. The states of 39 S that have the components in their wave functions corresponding to three neutrons in the 1f 7/2 orbital outside the N = 20 core have also been discussed within the context of the 0 ω shell-model calculations presented here.

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Section: Resultsmentioning

confidence: 85%

First in-beamγ-ray study of the level structure of neutron-richS39

et al. 2016

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“…For the 36 Cl decay constant, we use λ 36 = (2.301 ± 0.011) × 10 −6 yr −1 (Nica et al. ). For the radioactive decay of 41 Ca, we use the new decay constant of λ 41 = (6.97 ± 0.11) × 10 −6 yr −1 from Jörg et al.…”

Section: Resultsmentioning

confidence: 99%

The constancy of galactic cosmic rays as recorded by cosmogenic nuclides in iron meteorites

Smith

Cook

Merchel

et al. 2019

Meteorit & Planetary Scien

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We measured the He, Ne, and Ar isotopic concentrations and the 10Be, 26Al, 36Cl, and 41Ca concentrations in 56 iron meteorites of groups IIIAB, IIAB, IVA, IC, IIA, IIB, and one ungrouped. From 41Ca and 36Cl data, we calculated terrestrial ages indistinguishable from zero for six samples, indicating recent falls, up to 562 ± 86 ka. Three of the studied meteorites are falls. The data for the other 47 irons confirm that terrestrial ages for iron meteorites can be as long as a few hundred thousand years even in relatively humid conditions. The 36Cl‐36Ar cosmic ray exposure (CRE) ages range from 4.3 ± 0.4 Ma to 652 ± 99 Ma. By including literature data, we established a consistent and reliable CRE age database for 67 iron meteorites. The high quality of the CRE ages enables us to study structures in the CRE age histogram more reliably. At first sight, the CRE age histogram shows peaks at about 400 and 630 Ma. After correction for pairing, the updated CRE age histogram comprises 41 individual samples and shows no indications of temporal periodicity, especially not if one considers each iron meteorite group separately. Our study contradicts the hypothesis of periodic GCR intensity variations (Shaviv 2002, 2003), confirming other studies indicating that there are no periodic structures in the CRE age histogram (e.g., Rahmstorf et al. 2004; Jahnke 2005). The data contradict the hypothesis that periodic GCR intensity variations might have triggered periodic Earth climate changes. The 36Cl‐36Ar CRE ages are on average 40% lower than the 41K‐K CRE ages (e.g., Voshage 1967). This offset can either be due to an offset in the 41K‐K dating system or due to a significantly lower GCR intensity in the time interval 195–656 Ma compared to the recent past. A 40% lower GCR intensity, however, would have increased the Earth temperature by up to 2 °C, which seems unrealistic and leaves an ill‐defined 41K‐K CRE age system the most likely explanation. Finally, we present new 26Al/21Ne and 10Be/21Ne production rate ratios of 0.32 ± 0.01 and 0.44 ± 0.03, respectively.

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“…The state tentatively proposed at an excitation energy of 4196 keV is a possible candidate corresponding to the coupling of the odd neutron in the 1f 7/2 orbital to the J π = 3 − state of the 36 S core at an excitation energy of 4193 keV [32]. On this basis, a tentative J π value of 13/2 + is proposed.…”

Section: -4mentioning

confidence: 88%

“…Earlier related studies have been mainly concerned with the role of negative-parity intruder orbitals in the structure of neutron-rich nuclei on the periphery of the tightly circumscribed island of inversion, centered on 32 Mg, and on the description of such nuclei using state-ofthe-art shell-model calculations. See, for example, Ref.…”

Section: Introductionmentioning

confidence: 99%

Particle-core coupling inS37

Chapman¹,

Wang²,

Haas³

et al. 2016

Phys. Rev. C

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Excited states of the neutron-rich N = 21 37 S nucleus have been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of 36 S ions with a thin 208 Pb target. The magnetic spectrometer, PRISMA, and the γ -ray array, CLARA, were used in the measurements. The level scheme of 37 S was established to an excitation energy of 4196 keV and a number of new transitions were observed, in particular that corresponding to the decay of the proposed J π = (11/2 − ) level at an excitation energy of 2776 keV. The structure of the state is discussed within the context of state-of-the-art shell-model calculations using the SDPF-U effective interaction; the main component of the wave function corresponds to the coupling of the odd 1f 7/2 neutron to the first 2 + state of the 36 S core. The electromagnetic decay properties of the state are discussed within the context of a particle-core coupling model and the shell model. The other members of the multiplet of states are also discussed.

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Nuclear Data Sheets for A = 36

Cited by 76 publications

References 309 publications

First in-beamγ-ray study of the level structure of neutron-richS39

First in-beamγ-ray study of the level structure of neutron-richS39

The constancy of galactic cosmic rays as recorded by cosmogenic nuclides in iron meteorites

Particle-core coupling inS37

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